/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:16:56,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:16:56,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:16:56,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:16:56,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:16:56,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:16:56,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:16:56,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:16:56,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:16:56,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:16:56,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:16:56,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:16:56,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:16:56,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:16:56,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:16:56,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:16:56,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:16:56,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:16:56,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:16:56,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:16:56,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:16:56,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:16:56,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:16:56,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:16:56,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:16:56,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:16:56,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:16:56,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:16:56,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:16:56,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:16:56,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:16:56,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:16:56,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:16:56,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:16:56,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:16:56,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:16:56,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:16:56,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:16:56,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:16:56,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:16:56,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:16:56,206 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 [2020-07-20 17:16:56,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:16:56,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:16:56,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:16:56,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:16:56,234 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:16:56,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:16:56,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:16:56,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:16:56,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:16:56,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:16:56,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:16:56,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:16:56,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:16:56,235 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:16:56,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:16:56,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:16:56,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:16:56,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:16:56,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:16:56,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:16:56,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:16:56,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:16:56,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:16:56,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:16:56,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:16:56,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:16:56,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:56,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:16:56,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:16:56,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:16:56,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:16:56,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:16:56,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:16:56,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:16:56,710 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:16:56,713 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 17:16:56,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d34e7170/8b8118aa9b964242ba6b86fdf0fa75a0/FLAGcc131d146 [2020-07-20 17:16:57,489 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:16:57,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 17:16:57,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d34e7170/8b8118aa9b964242ba6b86fdf0fa75a0/FLAGcc131d146 [2020-07-20 17:16:57,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d34e7170/8b8118aa9b964242ba6b86fdf0fa75a0 [2020-07-20 17:16:57,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:16:57,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:16:57,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:16:57,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:16:57,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:16:57,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:16:57" (1/1) ... [2020-07-20 17:16:57,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6492a76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:57, skipping insertion in model container [2020-07-20 17:16:57,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:16:57" (1/1) ... [2020-07-20 17:16:57,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:16:57,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:16:58,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:16:58,508 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:16:58,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:16:58,625 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:16:58,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58 WrapperNode [2020-07-20 17:16:58,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:16:58,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:16:58,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:16:58,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:16:58,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (1/1) ... [2020-07-20 17:16:58,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:16:58,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:16:58,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:16:58,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:16:58,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (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 [2020-07-20 17:16:58,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:16:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:16:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:16:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:16:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:16:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:16:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:16:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:16:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:16:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:16:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:16:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:16:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:16:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:16:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:16:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:16:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:16:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:16:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:16:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:16:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:16:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:16:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:16:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:16:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:16:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:16:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:16:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:16:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:16:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:16:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:16:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:16:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:16:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:16:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:16:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:16:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:16:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:16:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:16:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:16:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:16:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:16:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:16:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:16:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:16:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:16:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:16:59,692 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:16:59,692 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 17:16:59,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:16:59 BoogieIcfgContainer [2020-07-20 17:16:59,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:16:59,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:16:59,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:16:59,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:16:59,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:16:57" (1/3) ... [2020-07-20 17:16:59,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe993e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:16:59, skipping insertion in model container [2020-07-20 17:16:59,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:58" (2/3) ... [2020-07-20 17:16:59,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe993e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:16:59, skipping insertion in model container [2020-07-20 17:16:59,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:16:59" (3/3) ... [2020-07-20 17:16:59,718 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-07-20 17:16:59,732 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:16:59,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 17:16:59,767 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 17:16:59,813 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:16:59,814 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:16:59,818 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:16:59,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:16:59,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:16:59,819 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:16:59,819 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:16:59,819 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:16:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-07-20 17:16:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 17:16:59,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:59,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:16:59,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:16:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-07-20 17:16:59,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:59,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033368476] [2020-07-20 17:16:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:00,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:17:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:00,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:00,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033368476] [2020-07-20 17:17:00,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:00,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:00,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840496128] [2020-07-20 17:17:00,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:00,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:00,175 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 3 states. [2020-07-20 17:17:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:00,300 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-07-20 17:17:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:00,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 17:17:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:00,316 INFO L225 Difference]: With dead ends: 188 [2020-07-20 17:17:00,317 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 17:17:00,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 17:17:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-20 17:17:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 17:17:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-07-20 17:17:00,376 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-07-20 17:17:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:00,377 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-07-20 17:17:00,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-07-20 17:17:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:17:00,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:00,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:00,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:00,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-07-20 17:17:00,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:00,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467043270] [2020-07-20 17:17:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:00,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:17:00,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:17:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:00,815 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 13 treesize of output 9 [2020-07-20 17:17:00,816 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:00,829 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:00,835 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 13 treesize of output 9 [2020-07-20 17:17:00,836 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:00,848 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:00,849 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:00,849 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:17:00,881 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:00,883 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:00,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:00,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467043270] [2020-07-20 17:17:00,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:00,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:00,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318137923] [2020-07-20 17:17:00,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:00,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:00,903 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2020-07-20 17:17:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:01,069 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2020-07-20 17:17:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:17:01,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:17:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:01,073 INFO L225 Difference]: With dead ends: 208 [2020-07-20 17:17:01,073 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 17:17:01,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 17:17:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2020-07-20 17:17:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 17:17:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-07-20 17:17:01,099 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-07-20 17:17:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:01,099 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-07-20 17:17:01,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-07-20 17:17:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:17:01,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:01,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:01,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:01,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:01,318 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-07-20 17:17:01,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:01,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185066757] [2020-07-20 17:17:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:01,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:17:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:01,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:17:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:01,467 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 13 treesize of output 9 [2020-07-20 17:17:01,468 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:01,475 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:01,480 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 13 treesize of output 9 [2020-07-20 17:17:01,481 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:01,487 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:01,488 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:01,488 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:17:01,502 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:01,505 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:01,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:01,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185066757] [2020-07-20 17:17:01,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:01,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:01,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055004821] [2020-07-20 17:17:01,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:01,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:01,520 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 4 states. [2020-07-20 17:17:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:01,669 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2020-07-20 17:17:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:01,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:17:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:01,673 INFO L225 Difference]: With dead ends: 139 [2020-07-20 17:17:01,673 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 17:17:01,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 17:17:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 17:17:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 17:17:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-07-20 17:17:01,688 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 14 [2020-07-20 17:17:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:01,689 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-07-20 17:17:01,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-07-20 17:17:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:17:01,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:01,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:01,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:01,905 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:01,906 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-07-20 17:17:01,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:01,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250263881] [2020-07-20 17:17:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:02,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:17:02,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:17:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:02,057 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 [2020-07-20 17:17:02,058 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,061 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:02,062 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:17:02,109 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:02,109 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 17:17:02,111 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,135 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:02,138 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_36|], 8=[|v_#memory_$Pointer$.base_36|]} [2020-07-20 17:17:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:02,145 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,157 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:02,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:02,166 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 17:17:02,167 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,180 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:02,181 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:02,182 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-20 17:17:02,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:17:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:02,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:02,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250263881] [2020-07-20 17:17:02,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:02,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:02,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228851698] [2020-07-20 17:17:02,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:02,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:02,216 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 5 states. [2020-07-20 17:17:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:02,420 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2020-07-20 17:17:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:02,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 17:17:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:02,425 INFO L225 Difference]: With dead ends: 223 [2020-07-20 17:17:02,425 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 17:17:02,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 17:17:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-07-20 17:17:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 17:17:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-07-20 17:17:02,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-07-20 17:17:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:02,438 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-07-20 17:17:02,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-07-20 17:17:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:17:02,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:02,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:02,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:02,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash 283662425, now seen corresponding path program 1 times [2020-07-20 17:17:02,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:02,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093373776] [2020-07-20 17:17:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:02,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:17:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:02,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:02,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093373776] [2020-07-20 17:17:02,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:02,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:02,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194318467] [2020-07-20 17:17:02,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:02,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:02,801 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 3 states. [2020-07-20 17:17:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:02,857 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-07-20 17:17:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:02,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 17:17:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:02,859 INFO L225 Difference]: With dead ends: 85 [2020-07-20 17:17:02,859 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 17:17:02,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 17:17:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-20 17:17:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 17:17:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-20 17:17:02,868 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2020-07-20 17:17:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:02,869 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-20 17:17:02,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-20 17:17:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:17:02,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:02,870 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] [2020-07-20 17:17:03,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:03,084 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:03,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 203604783, now seen corresponding path program 1 times [2020-07-20 17:17:03,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:03,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029564363] [2020-07-20 17:17:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:03,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:17:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:03,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:03,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029564363] [2020-07-20 17:17:03,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:03,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:03,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947613334] [2020-07-20 17:17:03,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:03,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:03,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:03,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:03,214 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 4 states. [2020-07-20 17:17:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:03,297 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-07-20 17:17:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:17:03,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 17:17:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:03,299 INFO L225 Difference]: With dead ends: 138 [2020-07-20 17:17:03,300 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 17:17:03,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 17:17:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2020-07-20 17:17:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:17:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-07-20 17:17:03,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 20 [2020-07-20 17:17:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:03,309 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-07-20 17:17:03,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-07-20 17:17:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:17:03,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:03,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:03,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:03,524 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash -249563430, now seen corresponding path program 1 times [2020-07-20 17:17:03,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:03,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019076714] [2020-07-20 17:17:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:03,654 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:17:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:17:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:03,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019076714] [2020-07-20 17:17:03,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:03,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:03,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081686074] [2020-07-20 17:17:03,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:03,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:03,672 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 3 states. [2020-07-20 17:17:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:03,696 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-07-20 17:17:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:03,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 17:17:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:03,698 INFO L225 Difference]: With dead ends: 103 [2020-07-20 17:17:03,698 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 17:17:03,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 17:17:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-07-20 17:17:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 17:17:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-07-20 17:17:03,707 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-07-20 17:17:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:03,707 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-07-20 17:17:03,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-07-20 17:17:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:17:03,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:03,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:03,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:03,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash 853457808, now seen corresponding path program 1 times [2020-07-20 17:17:03,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:03,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542402186] [2020-07-20 17:17:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:04,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:04,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:17:04,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:04,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:04,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542402186] [2020-07-20 17:17:04,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:04,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:04,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717816317] [2020-07-20 17:17:04,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:04,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:04,063 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 3 states. [2020-07-20 17:17:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:04,080 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-07-20 17:17:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:04,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 17:17:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:04,082 INFO L225 Difference]: With dead ends: 79 [2020-07-20 17:17:04,082 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 17:17:04,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 17:17:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-20 17:17:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:17:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-07-20 17:17:04,091 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-07-20 17:17:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:04,091 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-07-20 17:17:04,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-07-20 17:17:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:17:04,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:04,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:04,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:04,307 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1681365399, now seen corresponding path program 1 times [2020-07-20 17:17:04,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:04,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177061960] [2020-07-20 17:17:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:04,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:17:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:17:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:04,467 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 13 treesize of output 9 [2020-07-20 17:17:04,467 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:04,474 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:04,480 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 13 treesize of output 9 [2020-07-20 17:17:04,480 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:04,486 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:04,487 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:04,488 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:17:04,499 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:04,501 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:04,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:04,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177061960] [2020-07-20 17:17:04,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:04,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:04,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17364836] [2020-07-20 17:17:04,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:04,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:04,514 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 4 states. [2020-07-20 17:17:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:04,618 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-20 17:17:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:04,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 17:17:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:04,620 INFO L225 Difference]: With dead ends: 87 [2020-07-20 17:17:04,620 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 17:17:04,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 17:17:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-07-20 17:17:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 17:17:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-07-20 17:17:04,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 27 [2020-07-20 17:17:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:04,627 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-07-20 17:17:04,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-07-20 17:17:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:17:04,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:04,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:04,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:04,843 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1679518357, now seen corresponding path program 1 times [2020-07-20 17:17:04,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:04,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902275812] [2020-07-20 17:17:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:05,000 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 17:17:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:05,018 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 [2020-07-20 17:17:05,019 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,023 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,024 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:17:05,070 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,071 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 17:17:05,073 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,110 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,113 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_38|], 8=[|v_#memory_$Pointer$.base_38|]} [2020-07-20 17:17:05,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:05,118 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,127 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:05,156 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 17:17:05,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-20 17:17:05,157 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,166 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,169 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:05,170 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 17:17:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:05,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:05,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902275812] [2020-07-20 17:17:05,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:05,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:05,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329474475] [2020-07-20 17:17:05,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:05,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:05,233 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 5 states. [2020-07-20 17:17:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:05,460 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2020-07-20 17:17:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:05,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 17:17:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:05,462 INFO L225 Difference]: With dead ends: 148 [2020-07-20 17:17:05,462 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 17:17:05,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 17:17:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-07-20 17:17:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:17:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-07-20 17:17:05,475 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 27 [2020-07-20 17:17:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:05,475 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-07-20 17:17:05,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-07-20 17:17:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:17:05,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:05,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:05,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:05,697 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash -840739825, now seen corresponding path program 1 times [2020-07-20 17:17:05,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:05,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588777382] [2020-07-20 17:17:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:05,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:17:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:05,820 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 13 treesize of output 9 [2020-07-20 17:17:05,821 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,828 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,835 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 13 treesize of output 9 [2020-07-20 17:17:05,836 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,846 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,846 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,847 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:17:05,886 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 19 treesize of output 7 [2020-07-20 17:17:05,887 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,904 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,910 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 19 treesize of output 7 [2020-07-20 17:17:05,912 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,923 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:05,926 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:05,927 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 17:17:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:05,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:05,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588777382] [2020-07-20 17:17:05,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:05,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:17:05,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004093625] [2020-07-20 17:17:05,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:05,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:05,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:05,948 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-07-20 17:17:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:06,190 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2020-07-20 17:17:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:17:06,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-20 17:17:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:06,193 INFO L225 Difference]: With dead ends: 179 [2020-07-20 17:17:06,193 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 17:17:06,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:17:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 17:17:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-07-20 17:17:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 17:17:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-07-20 17:17:06,212 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 28 [2020-07-20 17:17:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:06,212 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-07-20 17:17:06,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-07-20 17:17:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:17:06,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:06,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:06,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:06,436 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-07-20 17:17:06,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:06,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198591842] [2020-07-20 17:17:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:06,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:17:06,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:06,563 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 [2020-07-20 17:17:06,564 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,566 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,567 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:17:06,598 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,599 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 [2020-07-20 17:17:06,601 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:06,601 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:06,664 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 17:17:06,665 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-20 17:17:06,665 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,686 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:06,702 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-20 17:17:06,702 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,721 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,723 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,724 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:353, output treesize:72 [2020-07-20 17:17:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:06,851 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:06,876 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,877 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 99 [2020-07-20 17:17:06,880 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 17:17:06,882 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 17:17:06,883 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:17:06,886 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 17:17:06,887 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 17:17:06,889 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:17:06,892 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:06,938 INFO L624 ElimStorePlain]: treesize reduction 50, result has 47.9 percent of original size [2020-07-20 17:17:06,958 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,959 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 34 [2020-07-20 17:17:06,961 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,967 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:06,969 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:06,970 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:114, output treesize:7 [2020-07-20 17:17:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:06,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:07,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198591842] [2020-07-20 17:17:07,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:07,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:17:07,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075127621] [2020-07-20 17:17:07,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:17:07,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:17:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:07,003 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 7 states. [2020-07-20 17:17:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:07,833 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2020-07-20 17:17:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:17:07,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 17:17:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:07,837 INFO L225 Difference]: With dead ends: 231 [2020-07-20 17:17:07,837 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 17:17:07,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:17:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 17:17:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 99. [2020-07-20 17:17:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 17:17:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-07-20 17:17:07,848 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 28 [2020-07-20 17:17:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:07,849 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-07-20 17:17:07,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:17:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-07-20 17:17:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 17:17:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:07,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:08,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:08,066 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1932526751, now seen corresponding path program 1 times [2020-07-20 17:17:08,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:08,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533878434] [2020-07-20 17:17:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:08,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:17:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:17:08,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:08,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533878434] [2020-07-20 17:17:08,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:08,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:08,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828408119] [2020-07-20 17:17:08,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:08,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:08,196 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 3 states. [2020-07-20 17:17:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:08,261 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-07-20 17:17:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:08,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 17:17:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:08,262 INFO L225 Difference]: With dead ends: 99 [2020-07-20 17:17:08,262 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 17:17:08,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 17:17:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-07-20 17:17:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-20 17:17:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-07-20 17:17:08,273 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 30 [2020-07-20 17:17:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:08,273 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-07-20 17:17:08,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-07-20 17:17:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:17:08,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:08,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:08,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:08,491 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-07-20 17:17:08,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:08,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217966457] [2020-07-20 17:17:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:08,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:08,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 17:17:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:08,615 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 [2020-07-20 17:17:08,616 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,619 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,620 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 17:17:08,643 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,644 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 [2020-07-20 17:17:08,646 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:17:08,646 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,694 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:08,721 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 17:17:08,722 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-20 17:17:08,722 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,748 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:08,758 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-20 17:17:08,759 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,783 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,785 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,786 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 17:17:08,911 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,911 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 53 [2020-07-20 17:17:08,913 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:17:08,916 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:17:08,917 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:08,947 INFO L624 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2020-07-20 17:17:08,960 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,960 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 32 [2020-07-20 17:17:08,961 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,967 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:08,969 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:08,969 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:90, output treesize:7 [2020-07-20 17:17:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:09,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:09,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217966457] [2020-07-20 17:17:09,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:09,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:17:09,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490084554] [2020-07-20 17:17:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:17:09,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:17:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:17:09,019 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 7 states. [2020-07-20 17:17:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:09,826 INFO L93 Difference]: Finished difference Result 219 states and 246 transitions. [2020-07-20 17:17:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:17:09,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 17:17:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:09,829 INFO L225 Difference]: With dead ends: 219 [2020-07-20 17:17:09,829 INFO L226 Difference]: Without dead ends: 217 [2020-07-20 17:17:09,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:17:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-20 17:17:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 100. [2020-07-20 17:17:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 17:17:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-07-20 17:17:09,840 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 31 [2020-07-20 17:17:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:09,841 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-07-20 17:17:09,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:17:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-07-20 17:17:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:17:09,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:09,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:10,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,058 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2127974144, now seen corresponding path program 1 times [2020-07-20 17:17:10,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:10,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267593481] [2020-07-20 17:17:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:17:10,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:10,164 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 13 treesize of output 9 [2020-07-20 17:17:10,165 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,171 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,173 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 13 treesize of output 9 [2020-07-20 17:17:10,173 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,178 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,179 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,179 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:17:10,196 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 19 treesize of output 7 [2020-07-20 17:17:10,196 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,202 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,204 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 19 treesize of output 7 [2020-07-20 17:17:10,205 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,215 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,216 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,216 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 17:17:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:17:10,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:10,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267593481] [2020-07-20 17:17:10,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:10,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:17:10,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64705300] [2020-07-20 17:17:10,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:17:10,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:10,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:17:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:17:10,231 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 4 states. [2020-07-20 17:17:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:10,342 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-07-20 17:17:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:10,342 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-07-20 17:17:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:10,344 INFO L225 Difference]: With dead ends: 144 [2020-07-20 17:17:10,344 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 17:17:10,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 17:17:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 17:17:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 17:17:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-07-20 17:17:10,355 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 33 [2020-07-20 17:17:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:10,356 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-07-20 17:17:10,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:17:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-07-20 17:17:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:17:10,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:10,357 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:10,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,571 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1679328926, now seen corresponding path program 1 times [2020-07-20 17:17:10,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:10,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991213884] [2020-07-20 17:17:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:10,667 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:17:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:10,688 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 [2020-07-20 17:17:10,689 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,695 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,700 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 [2020-07-20 17:17:10,700 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,706 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,707 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,707 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-20 17:17:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:10,725 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 21 treesize of output 20 [2020-07-20 17:17:10,726 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,737 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:10,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-20 17:17:10,748 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,758 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,759 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,759 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:36 [2020-07-20 17:17:10,826 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 [2020-07-20 17:17:10,827 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,849 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,855 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,856 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 1 case distinctions, treesize of input 22 treesize of output 10 [2020-07-20 17:17:10,858 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,865 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:10,866 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:10,866 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2020-07-20 17:17:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:10,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:10,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991213884] [2020-07-20 17:17:10,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:10,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 17:17:10,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187692727] [2020-07-20 17:17:10,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:17:10,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:17:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:17:10,999 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 9 states. [2020-07-20 17:17:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:11,371 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2020-07-20 17:17:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:17:11,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-07-20 17:17:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:11,373 INFO L225 Difference]: With dead ends: 207 [2020-07-20 17:17:11,373 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 17:17:11,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:17:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 17:17:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 123. [2020-07-20 17:17:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-20 17:17:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-07-20 17:17:11,385 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 33 [2020-07-20 17:17:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:11,385 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-07-20 17:17:11,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:17:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-07-20 17:17:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 17:17:11,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:11,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:11,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:11,602 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1814124928, now seen corresponding path program 1 times [2020-07-20 17:17:11,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:11,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367214592] [2020-07-20 17:17:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:11,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:11,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 17:17:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:11,713 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 [2020-07-20 17:17:11,713 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,717 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,718 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 17:17:11,748 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,748 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 [2020-07-20 17:17:11,749 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,788 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:11,808 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 17:17:11,809 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-20 17:17:11,809 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,832 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:11,839 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-20 17:17:11,840 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,861 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:11,862 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:11,862 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 17:17:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:11,957 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 17:17:11,958 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-20 17:17:11,961 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:17:11,965 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:17:11,966 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:11,997 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-20 17:17:12,010 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,011 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-20 17:17:12,012 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,020 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,021 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,021 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-20 17:17:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:17:12,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:12,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367214592] [2020-07-20 17:17:12,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:12,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:17:12,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645995847] [2020-07-20 17:17:12,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:17:12,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:17:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:17:12,047 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 6 states. [2020-07-20 17:17:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:12,431 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2020-07-20 17:17:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:17:12,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-20 17:17:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:12,433 INFO L225 Difference]: With dead ends: 162 [2020-07-20 17:17:12,434 INFO L226 Difference]: Without dead ends: 160 [2020-07-20 17:17:12,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:17:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-20 17:17:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2020-07-20 17:17:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 17:17:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-07-20 17:17:12,445 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 33 [2020-07-20 17:17:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:12,445 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-07-20 17:17:12,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:17:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-07-20 17:17:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:17:12,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:12,446 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:12,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:12,662 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:12,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash 270360779, now seen corresponding path program 1 times [2020-07-20 17:17:12,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:12,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143950882] [2020-07-20 17:17:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:12,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:17:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:12,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:17:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:12,761 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 [2020-07-20 17:17:12,762 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,766 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,769 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 [2020-07-20 17:17:12,770 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,779 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,780 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,780 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-07-20 17:17:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:12,808 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 21 treesize of output 20 [2020-07-20 17:17:12,809 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,820 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:12,826 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 21 treesize of output 20 [2020-07-20 17:17:12,827 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,835 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,835 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,835 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2020-07-20 17:17:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:12,861 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 24 treesize of output 10 [2020-07-20 17:17:12,862 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,876 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,879 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 17:17:12,880 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2020-07-20 17:17:12,881 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,884 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:12,885 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:12,885 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-20 17:17:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:17:12,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:17:12,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143950882] [2020-07-20 17:17:12,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:12,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2020-07-20 17:17:12,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840083227] [2020-07-20 17:17:12,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:17:12,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:17:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:12,943 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 5 states. [2020-07-20 17:17:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:13,078 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2020-07-20 17:17:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:17:13,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-20 17:17:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:13,080 INFO L225 Difference]: With dead ends: 161 [2020-07-20 17:17:13,081 INFO L226 Difference]: Without dead ends: 129 [2020-07-20 17:17:13,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:17:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-20 17:17:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-07-20 17:17:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 17:17:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-07-20 17:17:13,091 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 36 [2020-07-20 17:17:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:13,092 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-07-20 17:17:13,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:17:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-07-20 17:17:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:17:13,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:13,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:13,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:13,294 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1026452049, now seen corresponding path program 1 times [2020-07-20 17:17:13,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:13,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474392770] [2020-07-20 17:17:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:13,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:13,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 17:17:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:13,431 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 [2020-07-20 17:17:13,431 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,436 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,437 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 17:17:13,473 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 17:17:13,475 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,498 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,500 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_52|], 8=[|v_#memory_$Pointer$.base_52|]} [2020-07-20 17:17:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:13,504 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,518 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:13,524 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 17:17:13,525 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,547 INFO L624 ElimStorePlain]: treesize reduction 4, result has 88.6 percent of original size [2020-07-20 17:17:13,548 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,549 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:189, output treesize:40 [2020-07-20 17:17:13,589 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:13,590 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2020-07-20 17:17:13,591 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,604 INFO L624 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2020-07-20 17:17:13,605 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:13,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:4 [2020-07-20 17:17:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:13,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:13,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474392770] [2020-07-20 17:17:13,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:13,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:17:13,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135564856] [2020-07-20 17:17:13,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:17:13,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:17:13,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:17:13,624 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 6 states. [2020-07-20 17:17:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:14,000 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2020-07-20 17:17:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:17:14,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-07-20 17:17:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:14,003 INFO L225 Difference]: With dead ends: 167 [2020-07-20 17:17:14,003 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 17:17:14,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:17:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 17:17:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 120. [2020-07-20 17:17:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 17:17:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2020-07-20 17:17:14,015 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 36 [2020-07-20 17:17:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:14,015 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2020-07-20 17:17:14,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:17:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2020-07-20 17:17:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:17:14,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:14,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:14,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:14,230 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-07-20 17:17:14,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:14,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497380798] [2020-07-20 17:17:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:14,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:17:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:17:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:14,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:14,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497380798] [2020-07-20 17:17:14,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:14,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:14,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514738832] [2020-07-20 17:17:14,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:14,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:14,423 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand 3 states. [2020-07-20 17:17:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:14,455 INFO L93 Difference]: Finished difference Result 159 states and 186 transitions. [2020-07-20 17:17:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:14,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 17:17:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:14,458 INFO L225 Difference]: With dead ends: 159 [2020-07-20 17:17:14,458 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 17:17:14,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 17:17:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 149. [2020-07-20 17:17:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 17:17:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-07-20 17:17:14,476 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 36 [2020-07-20 17:17:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:14,478 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-07-20 17:17:14,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-07-20 17:17:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:17:14,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:14,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:14,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:14,697 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1632051366, now seen corresponding path program 1 times [2020-07-20 17:17:14,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:14,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837368518] [2020-07-20 17:17:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:14,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:17:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:14,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:17:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837368518] [2020-07-20 17:17:14,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:17:14,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:17:14,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996153764] [2020-07-20 17:17:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:17:14,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:14,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:17:14,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:14,850 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 3 states. [2020-07-20 17:17:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:17:14,874 INFO L93 Difference]: Finished difference Result 258 states and 306 transitions. [2020-07-20 17:17:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:17:14,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 17:17:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:17:14,877 INFO L225 Difference]: With dead ends: 258 [2020-07-20 17:17:14,877 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 17:17:14,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:17:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 17:17:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2020-07-20 17:17:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 17:17:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2020-07-20 17:17:14,890 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 36 [2020-07-20 17:17:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:17:14,891 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2020-07-20 17:17:14,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:17:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2020-07-20 17:17:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 17:17:14,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:17:14,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:17:15,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:15,108 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:17:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:17:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash -366933706, now seen corresponding path program 1 times [2020-07-20 17:17:15,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:17:15,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664723102] [2020-07-20 17:17:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:17:15,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:17:15,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:17:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 17:17:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:17:15,237 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 [2020-07-20 17:17:15,237 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,240 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,240 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,240 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:17:15,248 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 13 treesize of output 9 [2020-07-20 17:17:15,248 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,260 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 13 treesize of output 9 [2020-07-20 17:17:15,261 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,268 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,269 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,269 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:24 [2020-07-20 17:17:15,317 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,318 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 [2020-07-20 17:17:15,319 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,363 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:15,372 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 37 treesize of output 27 [2020-07-20 17:17:15,372 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,392 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:15,403 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 37 treesize of output 27 [2020-07-20 17:17:15,404 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,423 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,425 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:15,425 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:86, output treesize:54 [2020-07-20 17:17:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:15,485 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 49 treesize of output 50 [2020-07-20 17:17:15,485 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,504 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:15,597 INFO L350 Elim1Store]: treesize reduction 46, result has 65.2 percent of original size [2020-07-20 17:17:15,598 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 124 [2020-07-20 17:17:15,602 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-07-20 17:17:15,602 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-07-20 17:17:15,603 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:15,654 INFO L624 ElimStorePlain]: treesize reduction 64, result has 57.0 percent of original size [2020-07-20 17:17:15,657 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:15,657 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:101, output treesize:85 [2020-07-20 17:17:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:17,841 INFO L350 Elim1Store]: treesize reduction 10, result has 85.1 percent of original size [2020-07-20 17:17:17,842 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 92 [2020-07-20 17:17:17,843 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:17:17,844 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 17:17:17,845 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:17:17,846 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 17:17:17,847 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 17:17:17,887 INFO L624 ElimStorePlain]: treesize reduction 26, result has 66.7 percent of original size [2020-07-20 17:17:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:17:17,894 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 17:17:17,894 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2020-07-20 17:17:17,895 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:17,902 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:17:17,903 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:17,903 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:103, output treesize:7 [2020-07-20 17:17:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:17,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:17:18,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:17:22,193 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 17:17:22,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:17:29,084 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 17:17:47,680 WARN L193 SmtUtils]: Spent 12.20 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 17:17:49,857 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:17:49,861 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:17:49,864 INFO L624 ElimStorePlain]: treesize reduction 57, result has 1.7 percent of original size [2020-07-20 17:17:49,865 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-20 17:17:49,865 INFO L544 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:17:49,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:117, output treesize:1 [2020-07-20 17:17:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:17:49,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664723102] [2020-07-20 17:17:49,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:17:49,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 17:17:49,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97676430] [2020-07-20 17:17:49,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:17:49,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:17:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:17:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=154, Unknown=3, NotChecked=0, Total=210 [2020-07-20 17:17:49,894 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand 15 states. [2020-07-20 17:18:02,382 WARN L193 SmtUtils]: Spent 12.15 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:18:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:18:22,070 INFO L93 Difference]: Finished difference Result 412 states and 487 transitions. [2020-07-20 17:18:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 17:18:22,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-07-20 17:18:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:18:22,078 INFO L225 Difference]: With dead ends: 412 [2020-07-20 17:18:22,078 INFO L226 Difference]: Without dead ends: 360 [2020-07-20 17:18:22,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=295, Invalid=822, Unknown=5, NotChecked=0, Total=1122 [2020-07-20 17:18:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-07-20 17:18:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 169. [2020-07-20 17:18:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-20 17:18:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2020-07-20 17:18:22,093 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 40 [2020-07-20 17:18:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:18:22,093 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2020-07-20 17:18:22,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:18:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2020-07-20 17:18:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 17:18:22,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:18:22,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:18:22,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:18:22,308 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:18:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:18:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1659756179, now seen corresponding path program 1 times [2020-07-20 17:18:22,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:18:22,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673351781] [2020-07-20 17:18:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:18:22,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:18:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:18:22,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:18:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:18:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:18:22,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:18:22,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673351781] [2020-07-20 17:18:22,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:18:22,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:18:22,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989819022] [2020-07-20 17:18:22,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:18:22,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:18:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:18:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:18:22,422 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand 3 states. [2020-07-20 17:18:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:18:22,457 INFO L93 Difference]: Finished difference Result 271 states and 320 transitions. [2020-07-20 17:18:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:18:22,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-07-20 17:18:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:18:22,460 INFO L225 Difference]: With dead ends: 271 [2020-07-20 17:18:22,460 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 17:18:22,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:18:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 17:18:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2020-07-20 17:18:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-20 17:18:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2020-07-20 17:18:22,472 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 40 [2020-07-20 17:18:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:18:22,472 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2020-07-20 17:18:22,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:18:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2020-07-20 17:18:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 17:18:22,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:18:22,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:18:22,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:18:22,687 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:18:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:18:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-07-20 17:18:22,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:18:22,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950468130] [2020-07-20 17:18:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:18:22,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:18:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:18:22,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:18:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:18:22,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:18:22,846 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:18:22,846 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:18:23,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:18:23,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:18:23 BoogieIcfgContainer [2020-07-20 17:18:23,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:18:23,109 INFO L168 Benchmark]: Toolchain (without parser) took 85378.83 ms. Allocated memory was 143.1 MB in the beginning and 372.2 MB in the end (delta: 229.1 MB). Free memory was 98.0 MB in the beginning and 177.5 MB in the end (delta: -79.5 MB). Peak memory consumption was 149.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,110 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 889.36 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 97.6 MB in the beginning and 169.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,111 INFO L168 Benchmark]: Boogie Preprocessor took 95.40 ms. Allocated memory is still 201.9 MB. Free memory was 169.0 MB in the beginning and 165.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,111 INFO L168 Benchmark]: RCFGBuilder took 983.20 ms. Allocated memory is still 201.9 MB. Free memory was 165.5 MB in the beginning and 110.2 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,111 INFO L168 Benchmark]: TraceAbstraction took 83399.20 ms. Allocated memory was 201.9 MB in the beginning and 372.2 MB in the end (delta: 170.4 MB). Free memory was 109.5 MB in the beginning and 177.5 MB in the end (delta: -68.0 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:18:23,113 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 889.36 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 97.6 MB in the beginning and 169.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.40 ms. Allocated memory is still 201.9 MB. Free memory was 169.0 MB in the beginning and 165.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 983.20 ms. Allocated memory is still 201.9 MB. Free memory was 165.5 MB in the beginning and 110.2 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 83399.20 ms. Allocated memory was 201.9 MB in the beginning and 372.2 MB in the end (delta: 170.4 MB). Free memory was 109.5 MB in the beginning and 177.5 MB in the end (delta: -68.0 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1025]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L991] SLL* list = malloc(sizeof(SLL)); [L992] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L993] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L993] COND FALSE !(__VERIFIER_nondet_int()) [L993] list->inner = malloc(sizeof(SLL)) [L993] EXPR list->inner [L993] list->inner->next = ((void*)0) [L993] EXPR list->inner [L993] list->inner->inner = ((void*)0) [L993] EXPR list->inner [L993] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={1143:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L993] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L995] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L998] COND FALSE !(__VERIFIER_nondet_int()) [L1008] end = ((void*)0) [L1009] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1012] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1014] COND TRUE ((void*)0) != end [L1016] int len = 0; [L1017] EXPR end->inner [L1017] SLL* inner = end->inner; [L1018] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={1143:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1020] COND TRUE len == 0 [L1021] len = 1 VAL [end={-1:0}, inner={1143:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={1143:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1025] EXPR inner->inner VAL [end={-1:0}, inner={1143:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={1143:0}] [L1025] COND FALSE !(!(((void*)0) == inner->inner)) [L1026] EXPR inner->next VAL [end={-1:0}, inner={1143:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1026] COND FALSE !(!(((void*)0) == inner->next)) [L1027] EXPR inner->inner [L1027] inner = inner->inner [L1028] COND TRUE len == 1 [L1029] EXPR inner->inner [L1029] inner = inner->inner [L1018] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={1143:282}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={1143:0}] [L1020] COND FALSE !(len == 0) [L1023] len = 2 VAL [end={-1:0}, inner={1143:282}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={1143:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={1143:282}, len=2, list={-1:0}, malloc(sizeof(SLL))={1143:0}, malloc(sizeof(SLL))={-1:0}] [L1025] EXPR inner->inner VAL [end={-1:0}, inner={1143:282}, inner->inner={12:13}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={1143:0}] [L1025] COND TRUE !(((void*)0) == inner->inner) [L1025] __VERIFIER_error() VAL [end={-1:0}, inner={1143:282}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={1143:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 89 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 83.2s, OverallIterations: 24, TraceHistogramMax: 2, AutomataDifference: 36.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1826 SDtfs, 2500 SDslu, 3641 SDs, 0 SdLazy, 1871 SolverSat, 220 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 17.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 772 GetRequests, 645 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 52.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 913 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 37.7s InterpolantComputationTime, 672 NumberOfCodeBlocks, 418 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 715 ConstructedInterpolants, 42 QuantifiedInterpolants, 348644 SizeOfPredicates, 138 NumberOfNonLiveVariables, 1799 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 26 InterpolantComputations, 20 PerfectInterpolantSequences, 18/26 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...