/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 BIGGEST_EQUIVALENCE_CLASS --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/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:36:40,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:36:40,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:36:40,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:36:40,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:36:40,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:36:40,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:36:40,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:36:40,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:36:40,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:36:40,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:36:40,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:36:40,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:36:40,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:36:40,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:36:40,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:36:40,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:36:40,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:36:40,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:36:40,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:36:40,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:36:40,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:36:40,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:36:40,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:36:40,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:36:40,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:36:40,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:36:40,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:36:40,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:36:40,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:36:40,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:36:40,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:36:40,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:36:40,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:36:40,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:36:40,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:36:40,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:36:40,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:36:40,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:36:40,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:36:40,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:36:40,604 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 [2020-07-21 22:36:40,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:36:40,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:36:40,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:36:40,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:36:40,626 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:36:40,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:36:40,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:36:40,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:36:40,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:36:40,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:36:40,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:36:40,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:36:40,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:36:40,628 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:36:40,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:36:40,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:36:40,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:36:40,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:36:40,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:36:40,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:36:40,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:36:40,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:36:40,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:36:40,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:36:40,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:36:40,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:36:40,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:40,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:36:40,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:36:40,631 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:36:41,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:36:41,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:36:41,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:36:41,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:36:41,077 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:36:41,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 22:36:41,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33645cde/1fb37d7232b041eeae928913895c60f0/FLAG9d20079a7 [2020-07-21 22:36:41,982 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:36:41,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2020-07-21 22:36:42,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33645cde/1fb37d7232b041eeae928913895c60f0/FLAG9d20079a7 [2020-07-21 22:36:42,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e33645cde/1fb37d7232b041eeae928913895c60f0 [2020-07-21 22:36:42,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:36:42,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:36:42,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:36:42,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:36:42,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:36:42,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:36:42" (1/1) ... [2020-07-21 22:36:42,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798c2c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:42, skipping insertion in model container [2020-07-21 22:36:42,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:36:42" (1/1) ... [2020-07-21 22:36:42,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:36:42,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:36:42,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:36:42,979 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:36:43,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:36:43,126 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:36:43,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43 WrapperNode [2020-07-21 22:36:43,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:36:43,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:36:43,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:36:43,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:36:43,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... [2020-07-21 22:36:43,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:36:43,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:36:43,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:36:43,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:36:43,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:36:43,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:36:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:36:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 22:36:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 22:36:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 22:36:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 22:36:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 22:36:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 22:36:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2020-07-21 22:36:43,296 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2020-07-21 22:36:43,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:36:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:36:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 22:36:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 22:36:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 22:36:43,297 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 22:36:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 22:36:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 22:36:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 22:36:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 22:36:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 22:36:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 22:36:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 22:36:43,301 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 22:36:43,302 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 22:36:43,303 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 22:36:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 22:36:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 22:36:43,306 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 22:36:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 22:36:43,308 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 22:36:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 22:36:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 22:36:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 22:36:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 22:36:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 22:36:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 22:36:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 22:36:43,312 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 22:36:43,313 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 22:36:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 22:36:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 22:36:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 22:36:43,314 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2020-07-21 22:36:43,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 22:36:43,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:36:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:36:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:36:43,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:36:44,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:36:44,009 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 22:36:44,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:36:44 BoogieIcfgContainer [2020-07-21 22:36:44,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:36:44,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:36:44,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:36:44,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:36:44,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:36:42" (1/3) ... [2020-07-21 22:36:44,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49248cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:36:44, skipping insertion in model container [2020-07-21 22:36:44,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:36:43" (2/3) ... [2020-07-21 22:36:44,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49248cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:36:44, skipping insertion in model container [2020-07-21 22:36:44,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:36:44" (3/3) ... [2020-07-21 22:36:44,031 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-07-21 22:36:44,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:36:44,062 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:36:44,084 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:36:44,122 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:36:44,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:36:44,122 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:36:44,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:36:44,123 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:36:44,123 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:36:44,123 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:36:44,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:36:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 22:36:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 22:36:44,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:44,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:36:44,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash -125905961, now seen corresponding path program 1 times [2020-07-21 22:36:44,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:44,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890190120] [2020-07-21 22:36:44,181 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 [2020-07-21 22:36:44,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:36:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:36:44,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:36:44,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:36:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:36:44,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890190120] [2020-07-21 22:36:44,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:36:44,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 22:36:44,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803774754] [2020-07-21 22:36:44,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 22:36:44,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 22:36:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:36:44,891 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 7 states. [2020-07-21 22:36:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:45,292 INFO L93 Difference]: Finished difference Result 95 states and 133 transitions. [2020-07-21 22:36:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:36:45,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-07-21 22:36:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:45,312 INFO L225 Difference]: With dead ends: 95 [2020-07-21 22:36:45,312 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 22:36:45,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:36:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 22:36:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-07-21 22:36:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 22:36:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 22:36:45,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 45 [2020-07-21 22:36:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:45,403 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 22:36:45,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 22:36:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 22:36:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 22:36:45,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:45,408 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:36:45,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:45,625 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 874015054, now seen corresponding path program 1 times [2020-07-21 22:36:45,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:45,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838548251] [2020-07-21 22:36:45,628 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 [2020-07-21 22:36:47,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:47,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:36:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:36:47,155 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 22:36:47,157 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:47,168 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:47,170 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:36:47,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2020-07-21 22:36:47,255 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:47,262 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:47,314 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 22:36:47,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:36:47,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838548251] [2020-07-21 22:36:47,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:36:47,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 22:36:47,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195763501] [2020-07-21 22:36:47,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:36:47,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:36:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:36:47,402 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-07-21 22:36:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:47,816 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-07-21 22:36:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:36:47,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-07-21 22:36:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:47,822 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:36:47,823 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:36:47,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:36:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:36:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-21 22:36:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:36:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 22:36:47,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 47 [2020-07-21 22:36:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:47,838 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 22:36:47,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:36:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 22:36:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-21 22:36:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:47,841 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:36:48,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:48,048 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 480988044, now seen corresponding path program 1 times [2020-07-21 22:36:48,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:48,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800133628] [2020-07-21 22:36:48,051 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 [2020-07-21 22:36:49,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 22:36:49,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 22:36:49,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:36:49,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800133628] [2020-07-21 22:36:49,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:36:49,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 22:36:49,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389129959] [2020-07-21 22:36:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 22:36:49,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 22:36:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:36:49,086 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-07-21 22:36:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:49,213 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 22:36:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:36:49,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-07-21 22:36:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:49,216 INFO L225 Difference]: With dead ends: 54 [2020-07-21 22:36:49,217 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:36:49,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:36:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:36:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 22:36:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:36:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-07-21 22:36:49,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 47 [2020-07-21 22:36:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:49,230 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-07-21 22:36:49,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 22:36:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-07-21 22:36:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 22:36:49,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:49,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:36:49,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:49,448 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2060209205, now seen corresponding path program 1 times [2020-07-21 22:36:49,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:49,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212675473] [2020-07-21 22:36:49,451 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 [2020-07-21 22:36:50,374 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:50,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 80 conjunts are in the unsatisfiable core [2020-07-21 22:36:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:50,427 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 [2020-07-21 22:36:50,428 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,435 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:50,436 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 22:36:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:36:50,466 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 22:36:50,467 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,474 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:50,476 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2020-07-21 22:36:50,655 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 [2020-07-21 22:36:50,656 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,679 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:50,688 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 13 treesize of output 9 [2020-07-21 22:36:50,689 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:50,710 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:50,712 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:36:50,713 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:49 [2020-07-21 22:36:51,707 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:36:52,788 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:36:52,820 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:52,821 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 17 treesize of output 21 [2020-07-21 22:36:52,823 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:52,826 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:52,842 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:36:52,852 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 36 treesize of output 24 [2020-07-21 22:36:52,854 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:52,865 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:52,867 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:36:52,868 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2020-07-21 22:36:53,027 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:53,029 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:53,112 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:36:53,255 INFO L440 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|], 2=[|#memory_int|]} [2020-07-21 22:36:53,269 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 27 treesize of output 15 [2020-07-21 22:36:53,271 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:36:53,276 INFO L624 ElimStorePlain]: treesize reduction 29, result has 3.3 percent of original size [2020-07-21 22:36:53,277 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-21 22:36:53,277 INFO L512 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2020-07-21 22:36:53,277 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:36:53,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:1 [2020-07-21 22:36:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:36:53,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:36:53,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:36:53,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:36:53,874 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:36:53,883 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:36:53,885 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 22:36:53,886 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2020-07-21 22:36:53,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212675473] [2020-07-21 22:36:53,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:36:53,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 22:36:53,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209017595] [2020-07-21 22:36:53,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:36:53,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:36:53,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:36:53,961 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2020-07-21 22:36:55,183 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:36:57,329 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:36:59,678 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:37:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:37:00,515 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-07-21 22:37:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 22:37:00,516 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 22:37:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:37:00,518 INFO L225 Difference]: With dead ends: 60 [2020-07-21 22:37:00,519 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 22:37:00,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 22:37:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 22:37:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-07-21 22:37:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 22:37:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-07-21 22:37:00,533 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 50 [2020-07-21 22:37:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:37:00,534 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-07-21 22:37:00,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:37:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-07-21 22:37:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 22:37:00,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:37:00,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:37:00,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:37:00,751 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:37:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:37:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1841731081, now seen corresponding path program 1 times [2020-07-21 22:37:00,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:37:00,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042110041] [2020-07-21 22:37:00,753 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 [2020-07-21 22:37:01,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:37:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:37:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:37:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:37:01,815 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 [2020-07-21 22:37:01,816 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:01,818 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:01,819 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:37:01,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-21 22:37:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:37:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:37:02,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:37:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 22:37:02,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042110041] [2020-07-21 22:37:02,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:37:02,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-07-21 22:37:02,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449011415] [2020-07-21 22:37:02,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:37:02,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:37:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:37:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:37:02,314 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-07-21 22:37:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:37:03,065 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-21 22:37:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:37:03,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-07-21 22:37:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:37:03,070 INFO L225 Difference]: With dead ends: 60 [2020-07-21 22:37:03,070 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:37:03,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:37:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:37:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 22:37:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 22:37:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 22:37:03,084 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 50 [2020-07-21 22:37:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:37:03,084 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 22:37:03,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:37:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 22:37:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 22:37:03,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:37:03,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2020-07-21 22:37:03,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:37:03,296 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:37:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:37:03,297 INFO L82 PathProgramCache]: Analyzing trace with hash -65733586, now seen corresponding path program 2 times [2020-07-21 22:37:03,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:37:03,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811292424] [2020-07-21 22:37:03,299 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 [2020-07-21 22:37:04,354 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:37:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:37:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 110 conjunts are in the unsatisfiable core [2020-07-21 22:37:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:37:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:04,434 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 22:37:04,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,442 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:04,444 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2020-07-21 22:37:04,521 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 [2020-07-21 22:37:04,522 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,536 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:04,536 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,537 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2020-07-21 22:37:04,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2020-07-21 22:37:04,617 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,657 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:04,669 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 [2020-07-21 22:37:04,670 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:04,698 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:04,701 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:04,703 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:52 [2020-07-21 22:37:05,660 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 22:37:06,844 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 22:37:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:06,891 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:06,892 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 58 [2020-07-21 22:37:06,894 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:06,895 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:06,936 INFO L624 ElimStorePlain]: treesize reduction 24, result has 68.0 percent of original size [2020-07-21 22:37:06,938 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:37:06,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:48 [2020-07-21 22:37:07,123 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:07,173 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:07,179 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:07,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:07,224 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:07,253 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:07,258 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:07,278 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:07,281 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:07,281 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:120, output treesize:66 [2020-07-21 22:37:14,317 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:37:19,213 WARN L193 SmtUtils]: Spent 4.83 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:37:19,231 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:19,235 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:19,238 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:19,367 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:19,368 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 [2020-07-21 22:37:19,370 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,392 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:19,393 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 [2020-07-21 22:37:19,394 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,508 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:37:19,508 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:19,511 INFO L440 ElimStorePlain]: Different costs {4=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_26|, |v_#memory_$Pointer$.offset_BEFORE_CALL_2|], 9=[|v_old(#memory_int)_AFTER_CALL_26|]} [2020-07-21 22:37:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:19,557 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 24 treesize of output 27 [2020-07-21 22:37:19,558 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:19,598 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 28 treesize of output 31 [2020-07-21 22:37:19,600 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,795 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-07-21 22:37:19,797 INFO L624 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2020-07-21 22:37:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:19,827 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 24 treesize of output 27 [2020-07-21 22:37:19,830 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:19,857 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 24 treesize of output 27 [2020-07-21 22:37:19,858 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:19,951 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:19,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:20,010 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:20,011 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 88 [2020-07-21 22:37:20,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 22:37:20,013 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:20,015 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 22:37:20,016 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:20,017 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 22:37:20,019 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 22:37:20,022 INFO L544 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:37:20,044 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 30 treesize of output 18 [2020-07-21 22:37:20,045 INFO L544 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:20,296 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-07-21 22:37:20,297 INFO L624 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2020-07-21 22:37:20,299 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 22:37:20,299 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:189, output treesize:143 [2020-07-21 22:37:20,968 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:21,118 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 2, 1] term [2020-07-21 22:37:21,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:37:21,136 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 22:37:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:37:21,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:37:21,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:37:21,802 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:37:22,074 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 22:37:22,216 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:37:22,249 INFO L440 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_100|, |v_#memory_$Pointer$.offset_93|], 2=[|v_#memory_int_92|], 3=[|v_#memory_$Pointer$.offset_94|, |v_#memory_$Pointer$.base_99|]} [2020-07-21 22:37:22,255 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:22,294 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:22,303 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:37:22,336 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:22,340 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:22,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:22,373 INFO L544 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:22,398 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:22,401 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:22,414 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:37:22,418 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-07-21 22:37:22,418 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:129, output treesize:63 [2020-07-21 22:37:22,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811292424] [2020-07-21 22:37:22,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:37:22,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-21 22:37:22,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829384943] [2020-07-21 22:37:22,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:37:22,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:37:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:37:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=756, Unknown=1, NotChecked=0, Total=870 [2020-07-21 22:37:22,511 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 23 states. [2020-07-21 22:37:42,454 WARN L193 SmtUtils]: Spent 15.53 s on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-07-21 22:38:15,433 WARN L193 SmtUtils]: Spent 32.76 s on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-07-21 22:38:38,045 WARN L193 SmtUtils]: Spent 16.11 s on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-07-21 22:38:42,570 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:38:43,172 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:38:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:38:43,607 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-07-21 22:38:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 22:38:43,608 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-07-21 22:38:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:38:43,610 INFO L225 Difference]: With dead ends: 64 [2020-07-21 22:38:43,610 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 22:38:43,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 85.2s TimeCoverageRelationStatistics Valid=264, Invalid=1625, Unknown=3, NotChecked=0, Total=1892 [2020-07-21 22:38:43,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 22:38:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-07-21 22:38:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 22:38:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-07-21 22:38:43,625 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 53 [2020-07-21 22:38:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:38:43,626 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-07-21 22:38:43,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:38:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-07-21 22:38:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 22:38:43,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:38:43,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:38:43,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:38:43,833 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:38:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:38:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash -458760596, now seen corresponding path program 2 times [2020-07-21 22:38:43,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:38:43,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312106152] [2020-07-21 22:38:43,835 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 [2020-07-21 22:38:44,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:38:44,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:38:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 22:38:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:38:44,965 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 [2020-07-21 22:38:44,965 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:44,974 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:44,975 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:38:44,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 22:38:44,995 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 [2020-07-21 22:38:44,996 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:45,008 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:45,010 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:38:45,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-21 22:38:45,130 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_96|], 2=[|v_#memory_$Pointer$.base_105|, |v_#memory_$Pointer$.base_103|]} [2020-07-21 22:38:45,138 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 [2020-07-21 22:38:45,139 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:45,159 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:45,163 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:45,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:45,179 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:38:45,196 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:45,198 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:38:45,199 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:62, output treesize:31 [2020-07-21 22:38:47,062 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:38:48,404 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 22:38:48,433 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:48,434 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 [2020-07-21 22:38:48,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:48,450 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:38:48,460 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 25 treesize of output 28 [2020-07-21 22:38:48,461 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:48,473 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:48,475 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:38:48,476 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:34 [2020-07-21 22:38:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:38:48,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:38:48,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:38:49,309 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.base_117|], 3=[|v_#memory_$Pointer$.base_118|]} [2020-07-21 22:38:49,313 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:38:49,327 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:49,330 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:38:49,338 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:38:49,341 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 22:38:49,341 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 22:38:49,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312106152] [2020-07-21 22:38:49,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 22:38:49,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-21 22:38:49,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029321311] [2020-07-21 22:38:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:38:49,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:38:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:38:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:38:49,426 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 18 states. [2020-07-21 22:38:52,590 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-21 22:39:00,128 WARN L193 SmtUtils]: Spent 7.45 s on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-07-21 22:39:04,195 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2020-07-21 22:39:07,352 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-07-21 22:39:15,226 WARN L193 SmtUtils]: Spent 7.80 s on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-21 22:39:19,269 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-07-21 22:39:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:39:20,351 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-07-21 22:39:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 22:39:20,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-07-21 22:39:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:39:20,354 INFO L225 Difference]: With dead ends: 64 [2020-07-21 22:39:20,354 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:39:20,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 22:39:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:39:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-07-21 22:39:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 22:39:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-21 22:39:20,369 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2020-07-21 22:39:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:39:20,370 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-21 22:39:20,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:39:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-21 22:39:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 22:39:20,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:39:20,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:39:20,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:39:20,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:39:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:39:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash 779859179, now seen corresponding path program 3 times [2020-07-21 22:39:20,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:39:20,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530669576] [2020-07-21 22:39:20,585 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 [2020-07-21 22:39:23,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:39:23,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:39:23,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:39:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:39:23,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:39:23,677 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:39:23,677 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:39:23,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:39:23,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:39:23 BoogieIcfgContainer [2020-07-21 22:39:23,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:39:23,987 INFO L168 Benchmark]: Toolchain (without parser) took 161726.84 ms. Allocated memory was 137.4 MB in the beginning and 383.8 MB in the end (delta: 246.4 MB). Free memory was 95.8 MB in the beginning and 314.0 MB in the end (delta: -218.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:39:23,988 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 137.4 MB. Free memory is still 114.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 22:39:23,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 862.32 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 95.4 MB in the beginning and 165.5 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:39:23,989 INFO L168 Benchmark]: Boogie Preprocessor took 80.71 ms. Allocated memory is still 199.8 MB. Free memory was 165.5 MB in the beginning and 163.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:39:23,989 INFO L168 Benchmark]: RCFGBuilder took 807.21 ms. Allocated memory is still 199.8 MB. Free memory was 162.6 MB in the beginning and 117.6 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:39:23,990 INFO L168 Benchmark]: TraceAbstraction took 159966.81 ms. Allocated memory was 199.8 MB in the beginning and 383.8 MB in the end (delta: 184.0 MB). Free memory was 117.6 MB in the beginning and 314.0 MB in the end (delta: -196.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 22:39:23,992 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 137.4 MB. Free memory is still 114.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 862.32 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 95.4 MB in the beginning and 165.5 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.71 ms. Allocated memory is still 199.8 MB. Free memory was 165.5 MB in the beginning and 163.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 807.21 ms. Allocated memory is still 199.8 MB. Free memory was 162.6 MB in the beginning and 117.6 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 159966.81 ms. Allocated memory was 199.8 MB in the beginning and 383.8 MB in the end (delta: 184.0 MB). Free memory was 117.6 MB in the beginning and 314.0 MB in the end (delta: -196.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L522] mlist *head; VAL [\old(head)=9, \old(head)=10, head={0:0}] [L543] int i; [L544] mlist *mylist, *temp; VAL [\old(head)=0, \old(head)=0, head={0:0}] [L545] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L533] COND TRUE head==((void *)0) [L534] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-1:0}, k=2, l={11:12}, l={-1:0}, malloc(sizeof(mlist))={-1:0}] [L545] RET insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, head={-1:0}, insert_list(mylist,2)=0, mylist={11:12}] [L546] CALL insert_list(mylist,5) VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-1, \old(k)=5, \result=0, head={-3:0}, k=5, l={-3:0}, l={11:12}, malloc(sizeof(mlist))={-3:0}] [L546] RET insert_list(mylist,5) VAL [\old(head)=0, \old(head)=0, head={-3:0}, insert_list(mylist,5)=0, mylist={11:12}] [L547] CALL insert_list(mylist,1) VAL [\old(head)=-3, \old(head)=0, \old(k)=1, head={-3:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, k=1, l={-4:0}, l={11:12}, malloc(sizeof(mlist))={-4:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=0, \old(head)=-3, \old(k)=1, head={-3:0}, k=1, l={-4:0}, l={11:12}, malloc(sizeof(mlist))={-4:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-3, \old(k)=1, \result=0, head={-4:0}, k=1, l={-4:0}, l={11:12}, malloc(sizeof(mlist))={-4:0}] [L547] RET insert_list(mylist,1) VAL [\old(head)=0, \old(head)=0, head={-4:0}, insert_list(mylist,1)=0, mylist={11:12}] [L548] CALL insert_list(mylist,3) VAL [\old(head)=-4, \old(head)=0, \old(k)=3, head={-4:0}, l={11:12}] [L531] l = (mlist*)malloc(sizeof(mlist)) [L532] l->key = k VAL [\old(head)=0, \old(head)=-4, \old(k)=3, head={-4:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L533] COND FALSE !(head==((void *)0)) [L536] l->key = k [L537] l->next = head VAL [\old(head)=-4, \old(head)=0, \old(k)=3, head={-4:0}, k=3, l={-2:0}, l={11:12}, malloc(sizeof(mlist))={-2:0}] [L539] head = l [L540] return 0; VAL [\old(head)=0, \old(head)=-4, \old(k)=3, \result=0, head={-2:0}, k=3, l={11:12}, l={-2:0}, malloc(sizeof(mlist))={-2:0}] [L548] RET insert_list(mylist,3) VAL [\old(head)=0, \old(head)=0, head={-2:0}, insert_list(mylist,3)=0, mylist={11:12}] [L549] CALL, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, l={-2:0}] [L524] l = head VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-2:0}, l={-2:0}] [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-2:0}, l={-2:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-2:0}, l={-4:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-3:0}, l={-2:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L525] COND TRUE l!=((void *)0) && l->key!=k [L526] EXPR l->next [L526] l = l->next [L525] l!=((void *)0) && l->key!=k [L525] EXPR l->key [L525] l!=((void *)0) && l->key!=k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={-2:0}, k=2, l={-1:0}, l={-2:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L525] COND FALSE !(l!=((void *)0) && l->key!=k) [L528] return l; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result={-1:0}, head={-2:0}, k=2, l={-1:0}, l={-2:0}] [L549] RET, EXPR search_list(head,2) VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, search_list(head,2)={-1:0}] [L549] temp = search_list(head,2) [L550] EXPR temp->key VAL [\old(head)=0, \old(head)=0, head={-2:0}, mylist={11:12}, temp={-1:0}, temp->key=2] [L550] CALL __VERIFIER_assert(temp->key==1) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, head={-2:0}] [L3] COND TRUE !(cond) VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] [L4] __VERIFIER_error() VAL [\old(cond)=0, \old(head)=0, \old(head)=0, cond=0, head={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 159.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 120.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 193 SDtfs, 432 SDslu, 632 SDs, 0 SdLazy, 1786 SolverSat, 300 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 392 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 128.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 401 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 431 ConstructedInterpolants, 12 QuantifiedInterpolants, 295498 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2256 ConjunctsInSsa, 309 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 216/297 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...