/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:33:07,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:33:07,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:33:07,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:33:07,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:33:07,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:33:07,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:33:07,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:33:07,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:33:07,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:33:07,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:33:07,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:33:07,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:33:07,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:33:07,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:33:07,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:33:07,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:33:07,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:33:07,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:33:07,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:33:07,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:33:07,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:33:07,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:33:07,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:33:07,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:33:07,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:33:07,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:33:07,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:33:07,880 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 [2020-07-07 11:33:07,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:33:07,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:33:07,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:33:07,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:33:07,905 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:33:07,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:33:07,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:33:07,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:33:07,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:33:07,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:33:07,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:33:07,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:33:07,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:33:07,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:33:07,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:33:07,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:33:07,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:33:07,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:33:07,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:33:07,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:33:07,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:33:07,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:33:07,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:33:07,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:33:07,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:33:07,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:33:07,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:33:07,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:33:07,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:33:07,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:33:08,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:33:08,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:33:08,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:33:08,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:33:08,253 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:33:08,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 11:33:08,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc81b014d/56af1f68b8dc48738961f49e8260daa8/FLAG3d5875dd0 [2020-07-07 11:33:08,873 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:33:08,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 11:33:08,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc81b014d/56af1f68b8dc48738961f49e8260daa8/FLAG3d5875dd0 [2020-07-07 11:33:09,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc81b014d/56af1f68b8dc48738961f49e8260daa8 [2020-07-07 11:33:09,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:33:09,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:33:09,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:33:09,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:33:09,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:33:09,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fe5064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09, skipping insertion in model container [2020-07-07 11:33:09,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:33:09,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:33:09,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:33:09,508 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:33:09,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:33:09,675 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:33:09,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09 WrapperNode [2020-07-07 11:33:09,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:33:09,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:33:09,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:33:09,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:33:09,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (1/1) ... [2020-07-07 11:33:09,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:33:09,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:33:09,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:33:09,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:33:09,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (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 [2020-07-07 11:33:09,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:33:09,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:33:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:33:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-07 11:33:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-07 11:33:09,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:33:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:33:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:33:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:33:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-07 11:33:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-07 11:33:09,803 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-07 11:33:09,803 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-07 11:33:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-07 11:33:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-07 11:33:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-07 11:33:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-07 11:33:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-07 11:33:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-07 11:33:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-07 11:33:09,806 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-07 11:33:09,806 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-07 11:33:09,806 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-07 11:33:09,806 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-07 11:33:09,807 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-07 11:33:09,808 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-07 11:33:09,808 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-07 11:33:09,808 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-07 11:33:09,809 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-07 11:33:09,810 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-07 11:33:09,810 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-07 11:33:09,810 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:33:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:33:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:33:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:33:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:33:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:33:10,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:33:10,357 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-07 11:33:10,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:33:10 BoogieIcfgContainer [2020-07-07 11:33:10,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:33:10,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:33:10,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:33:10,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:33:10,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:33:09" (1/3) ... [2020-07-07 11:33:10,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111f4170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:33:10, skipping insertion in model container [2020-07-07 11:33:10,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:33:09" (2/3) ... [2020-07-07 11:33:10,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111f4170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:33:10, skipping insertion in model container [2020-07-07 11:33:10,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:33:10" (3/3) ... [2020-07-07 11:33:10,372 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 11:33:10,384 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:33:10,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:33:10,409 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:33:10,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:33:10,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:33:10,431 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:33:10,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:33:10,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:33:10,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:33:10,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:33:10,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:33:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-07 11:33:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:33:10,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:10,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:10,461 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-07-07 11:33:10,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:10,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958346795] [2020-07-07 11:33:10,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:10,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958346795] [2020-07-07 11:33:10,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:33:10,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:33:10,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259127416] [2020-07-07 11:33:10,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:33:10,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:33:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:33:10,748 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-07-07 11:33:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:10,950 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-07-07 11:33:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:33:10,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-07-07 11:33:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:10,963 INFO L225 Difference]: With dead ends: 104 [2020-07-07 11:33:10,964 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:33:10,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:33:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:33:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-07 11:33:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:33:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-07-07 11:33:11,017 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-07-07 11:33:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:11,018 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-07-07 11:33:11,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:33:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-07-07 11:33:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:33:11,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:11,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:11,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:33:11,021 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-07-07 11:33:11,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:11,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249316277] [2020-07-07 11:33:11,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:11,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249316277] [2020-07-07 11:33:11,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924354998] [2020-07-07 11:33:11,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-07 11:33:11,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:33:11,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:11,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-07 11:33:11,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280325269] [2020-07-07 11:33:11,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:33:11,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:33:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:33:11,325 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 3 states. [2020-07-07 11:33:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:11,345 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-07-07 11:33:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:33:11,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-07 11:33:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:11,348 INFO L225 Difference]: With dead ends: 84 [2020-07-07 11:33:11,348 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:33:11,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:33:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:33:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-07 11:33:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 11:33:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-07-07 11:33:11,361 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2020-07-07 11:33:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:11,362 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-07-07 11:33:11,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:33:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-07-07 11:33:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:33:11,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:11,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:11,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:33:11,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash 446687854, now seen corresponding path program 1 times [2020-07-07 11:33:11,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:11,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155637308] [2020-07-07 11:33:11,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:11,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155637308] [2020-07-07 11:33:11,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446608550] [2020-07-07 11:33:11,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:11,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:33:11,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:11,773 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:33:11,788 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:33:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:33:11,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:11,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-07-07 11:33:11,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485970306] [2020-07-07 11:33:11,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:33:11,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:11,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:33:11,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:33:11,805 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-07-07 11:33:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:11,904 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-07-07 11:33:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:33:11,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-07 11:33:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:11,909 INFO L225 Difference]: With dead ends: 109 [2020-07-07 11:33:11,909 INFO L226 Difference]: Without dead ends: 73 [2020-07-07 11:33:11,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:33:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-07 11:33:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-07-07 11:33:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 11:33:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-07-07 11:33:11,925 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 38 [2020-07-07 11:33:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:11,925 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-07-07 11:33:11,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:33:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-07-07 11:33:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:33:11,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:11,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:12,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:12,141 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -140118160, now seen corresponding path program 1 times [2020-07-07 11:33:12,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:12,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623451832] [2020-07-07 11:33:12,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:12,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623451832] [2020-07-07 11:33:12,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382581017] [2020-07-07 11:33:12,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:33:12,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:12,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:12,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-07 11:33:12,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749215888] [2020-07-07 11:33:12,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:33:12,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:33:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:33:12,356 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 6 states. [2020-07-07 11:33:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:12,545 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-07-07 11:33:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:33:12,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-07 11:33:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:12,549 INFO L225 Difference]: With dead ends: 100 [2020-07-07 11:33:12,549 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 11:33:12,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:33:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 11:33:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-07 11:33:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:33:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-07-07 11:33:12,572 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 38 [2020-07-07 11:33:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:12,572 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-07-07 11:33:12,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:33:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-07-07 11:33:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:33:12,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:12,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:12,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:12,792 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1477568014, now seen corresponding path program 2 times [2020-07-07 11:33:12,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:12,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469073667] [2020-07-07 11:33:12,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:12,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469073667] [2020-07-07 11:33:12,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536582564] [2020-07-07 11:33:12,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:12,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:33:12,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:12,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:33:12,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:33:13,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:13,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-07-07 11:33:13,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009003481] [2020-07-07 11:33:13,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:33:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:33:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:33:13,064 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-07-07 11:33:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:13,231 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-07-07 11:33:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:33:13,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-07-07 11:33:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:13,233 INFO L225 Difference]: With dead ends: 147 [2020-07-07 11:33:13,233 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 11:33:13,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:33:13,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 11:33:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-07-07 11:33:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-07 11:33:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-07-07 11:33:13,245 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 40 [2020-07-07 11:33:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:13,245 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-07-07 11:33:13,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:33:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-07-07 11:33:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:33:13,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:13,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:13,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:13,463 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1128455540, now seen corresponding path program 1 times [2020-07-07 11:33:13,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:13,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72362237] [2020-07-07 11:33:13,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:13,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72362237] [2020-07-07 11:33:13,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320648362] [2020-07-07 11:33:13,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:13,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:33:13,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:13,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:13,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-07 11:33:13,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396915124] [2020-07-07 11:33:13,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:33:13,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:33:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:33:13,628 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 7 states. [2020-07-07 11:33:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:13,759 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-07-07 11:33:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:33:13,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-07 11:33:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:13,761 INFO L225 Difference]: With dead ends: 116 [2020-07-07 11:33:13,761 INFO L226 Difference]: Without dead ends: 65 [2020-07-07 11:33:13,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:33:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-07 11:33:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-07-07 11:33:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 11:33:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-07-07 11:33:13,775 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2020-07-07 11:33:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:13,778 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-07-07 11:33:13,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:33:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-07-07 11:33:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 11:33:13,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:13,780 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:13,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:33:13,982 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash 34367350, now seen corresponding path program 2 times [2020-07-07 11:33:13,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:13,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219188299] [2020-07-07 11:33:13,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:14,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219188299] [2020-07-07 11:33:14,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667955469] [2020-07-07 11:33:14,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:14,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:33:14,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:14,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:33:14,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 11:33:14,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:14,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-07-07 11:33:14,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324620192] [2020-07-07 11:33:14,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:33:14,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:33:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:33:14,207 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 5 states. [2020-07-07 11:33:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:14,347 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-07-07 11:33:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:33:14,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-07-07 11:33:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:14,350 INFO L225 Difference]: With dead ends: 134 [2020-07-07 11:33:14,350 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:33:14,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:33:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:33:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-07-07 11:33:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-07 11:33:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-07-07 11:33:14,358 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 42 [2020-07-07 11:33:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:14,359 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-07-07 11:33:14,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:33:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-07-07 11:33:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 11:33:14,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:14,360 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:14,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:14,561 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash -615754617, now seen corresponding path program 1 times [2020-07-07 11:33:14,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:14,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398007275] [2020-07-07 11:33:14,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:14,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398007275] [2020-07-07 11:33:14,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258364098] [2020-07-07 11:33:14,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:14,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:33:14,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:14,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:14,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-07 11:33:14,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907269892] [2020-07-07 11:33:14,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:33:14,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:33:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:33:14,743 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 8 states. [2020-07-07 11:33:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:14,880 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-07-07 11:33:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:33:14,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-07-07 11:33:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:14,882 INFO L225 Difference]: With dead ends: 108 [2020-07-07 11:33:14,882 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 11:33:14,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:33:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 11:33:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-07 11:33:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-07 11:33:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-07-07 11:33:14,890 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 47 [2020-07-07 11:33:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:14,890 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-07-07 11:33:14,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:33:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-07-07 11:33:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:33:14,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:14,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:15,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:15,105 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash -900340667, now seen corresponding path program 2 times [2020-07-07 11:33:15,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:15,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72436698] [2020-07-07 11:33:15,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:15,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72436698] [2020-07-07 11:33:15,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858472151] [2020-07-07 11:33:15,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:15,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:33:15,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:15,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:33:15,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:15,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:33:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:33:15,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:15,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2020-07-07 11:33:15,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875845898] [2020-07-07 11:33:15,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:33:15,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:33:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:33:15,361 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2020-07-07 11:33:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:15,524 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2020-07-07 11:33:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:33:15,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-07-07 11:33:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:15,527 INFO L225 Difference]: With dead ends: 160 [2020-07-07 11:33:15,527 INFO L226 Difference]: Without dead ends: 115 [2020-07-07 11:33:15,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:33:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-07 11:33:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-07-07 11:33:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-07 11:33:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-07-07 11:33:15,556 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 49 [2020-07-07 11:33:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:15,557 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-07-07 11:33:15,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:33:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-07-07 11:33:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:33:15,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:15,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:15,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:33:15,777 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1705682887, now seen corresponding path program 1 times [2020-07-07 11:33:15,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:15,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165327701] [2020-07-07 11:33:15,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:15,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165327701] [2020-07-07 11:33:15,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313807219] [2020-07-07 11:33:15,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:15,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:33:15,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:15,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:15,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-07 11:33:15,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018659154] [2020-07-07 11:33:15,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:33:15,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:15,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:33:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:33:15,975 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 9 states. [2020-07-07 11:33:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:16,131 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-07-07 11:33:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:33:16,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-07-07 11:33:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:16,133 INFO L225 Difference]: With dead ends: 154 [2020-07-07 11:33:16,133 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 11:33:16,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:33:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 11:33:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-07 11:33:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-07 11:33:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2020-07-07 11:33:16,155 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 49 [2020-07-07 11:33:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:16,156 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2020-07-07 11:33:16,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:33:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2020-07-07 11:33:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 11:33:16,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:16,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:16,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:16,359 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1198571515, now seen corresponding path program 2 times [2020-07-07 11:33:16,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:16,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498086374] [2020-07-07 11:33:16,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:33:16,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498086374] [2020-07-07 11:33:16,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632927959] [2020-07-07 11:33:16,440 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:16,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:33:16,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:16,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:33:16,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:16,541 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:33:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 11:33:16,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:33:16,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2020-07-07 11:33:16,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903223669] [2020-07-07 11:33:16,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:33:16,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:33:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:33:16,575 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 5 states. [2020-07-07 11:33:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:16,642 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-07-07 11:33:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:33:16,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-07-07 11:33:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:16,643 INFO L225 Difference]: With dead ends: 86 [2020-07-07 11:33:16,643 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:33:16,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:33:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:33:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:33:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:33:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:33:16,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-07-07 11:33:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:16,646 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:33:16,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:33:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:33:16,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:33:16,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:16,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:33:16,932 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-07-07 11:33:16,932 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-07-07 11:33:16,932 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-07-07 11:33:16,933 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-07-07 11:33:16,933 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-07-07 11:33:16,934 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-07-07 11:33:16,934 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-07 11:33:16,934 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-07-07 11:33:16,934 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-07-07 11:33:16,934 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-07 11:33:16,934 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-07-07 11:33:16,935 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-07 11:33:16,935 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-07-07 11:33:16,935 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-07-07 11:33:16,935 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-07-07 11:33:16,935 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-07 11:33:16,935 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-07-07 11:33:16,935 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-07-07 11:33:16,936 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-07-07 11:33:16,936 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-07-07 11:33:16,937 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:33:16,937 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-07 11:33:16,937 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:33:16,937 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-07-07 11:33:16,937 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-07-07 11:33:16,937 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-07-07 11:33:16,937 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:33:16,938 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:33:16,938 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:33:16,938 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:33:16,938 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-07 11:33:16,938 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-07-07 11:33:16,938 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-07-07 11:33:16,938 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-07 11:33:16,939 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:33:16,940 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-07 11:33:16,940 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-07 11:33:16,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:33:16 BoogieIcfgContainer [2020-07-07 11:33:16,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:33:16,954 INFO L168 Benchmark]: Toolchain (without parser) took 7746.61 ms. Allocated memory was 142.1 MB in the beginning and 276.8 MB in the end (delta: 134.7 MB). Free memory was 102.2 MB in the beginning and 139.7 MB in the end (delta: -37.4 MB). Peak memory consumption was 97.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,954 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.07 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 102.0 MB in the beginning and 179.2 MB in the end (delta: -77.2 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,956 INFO L168 Benchmark]: Boogie Preprocessor took 54.46 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,957 INFO L168 Benchmark]: RCFGBuilder took 631.12 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 147.5 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,957 INFO L168 Benchmark]: TraceAbstraction took 6587.93 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 146.9 MB in the beginning and 139.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:16,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 467.07 ms. Allocated memory was 142.1 MB in the beginning and 202.4 MB in the end (delta: 60.3 MB). Free memory was 102.0 MB in the beginning and 179.2 MB in the end (delta: -77.2 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.46 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 631.12 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 147.5 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6587.93 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 146.9 MB in the beginning and 139.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.4s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 562 SDtfs, 251 SDslu, 1336 SDs, 0 SdLazy, 769 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 532 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=10, 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, 11 MinimizatonAttempts, 97 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 64 PreInvPairs, 94 NumberOfFragments, 35 HoareAnnotationTreeSize, 64 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 896 NumberOfCodeBlocks, 858 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 875 ConstructedInterpolants, 0 QuantifiedInterpolants, 62932 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 72/188 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 correct! Received shutdown request...