/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:29:08,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:29:08,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:29:08,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:29:08,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:29:08,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:29:08,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:29:08,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:29:09,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:29:09,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:29:09,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:29:09,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:29:09,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:29:09,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:29:09,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:29:09,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:29:09,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:29:09,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:29:09,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:29:09,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:29:09,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:29:09,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:29:09,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:29:09,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:29:09,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:29:09,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:29:09,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:29:09,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:29:09,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:29:09,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:29:09,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:29:09,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:29:09,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:29:09,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:29:09,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:29:09,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:29:09,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:29:09,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:29:09,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:29:09,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:29:09,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:29:09,065 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 [2020-11-06 22:29:09,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:29:09,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:29:09,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:29:09,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:29:09,093 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:29:09,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:29:09,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:29:09,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:29:09,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:29:09,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:29:09,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:29:09,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:29:09,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:29:09,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:29:09,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:29:09,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:29:09,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:29:09,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:29:09,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:29:09,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:29:09,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:29:09,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:29:09,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:29:09,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:29:09,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:29:09,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:29:09,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:29:09,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:29:09,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:29:09,468 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:29:09,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-11-06 22:29:09,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5717894/49d591c049b14544bdad84831c2706da/FLAG7ee0a4551 [2020-11-06 22:29:10,223 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:29:10,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-11-06 22:29:10,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5717894/49d591c049b14544bdad84831c2706da/FLAG7ee0a4551 [2020-11-06 22:29:10,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5717894/49d591c049b14544bdad84831c2706da [2020-11-06 22:29:10,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:29:10,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:29:10,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:10,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:29:10,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:29:10,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421cce31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10, skipping insertion in model container [2020-11-06 22:29:10,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:29:10,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:29:10,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:10,815 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:29:10,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:29:10,855 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:29:10,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10 WrapperNode [2020-11-06 22:29:10,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:29:10,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:29:10,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:29:10,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:29:10,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (1/1) ... [2020-11-06 22:29:10,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:29:10,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:29:10,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:29:10,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:29:10,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (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 [2020-11-06 22:29:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:29:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:29:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:29:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-06 22:29:10,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:29:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:29:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:29:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:29:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:29:10,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:29:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 22:29:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:29:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:29:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:29:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:29:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:29:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:29:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:29:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:29:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:29:11,358 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:29:11,359 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 22:29:11,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:11 BoogieIcfgContainer [2020-11-06 22:29:11,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:29:11,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:29:11,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:29:11,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:29:11,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:10" (1/3) ... [2020-11-06 22:29:11,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d16d1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:11, skipping insertion in model container [2020-11-06 22:29:11,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:10" (2/3) ... [2020-11-06 22:29:11,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d16d1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:11, skipping insertion in model container [2020-11-06 22:29:11,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:11" (3/3) ... [2020-11-06 22:29:11,371 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-11-06 22:29:11,388 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:29:11,391 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:29:11,405 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:29:11,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:29:11,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:29:11,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:29:11,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:29:11,500 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:29:11,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:29:11,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:29:11,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:29:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-06 22:29:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:29:11,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:11,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:11,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash 597245021, now seen corresponding path program 1 times [2020-11-06 22:29:11,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:11,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568368026] [2020-11-06 22:29:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:29:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568368026] [2020-11-06 22:29:11,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:11,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:29:11,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338586658] [2020-11-06 22:29:11,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:29:11,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:29:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:29:12,009 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-11-06 22:29:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:12,168 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-11-06 22:29:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:29:12,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-06 22:29:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:12,177 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:29:12,178 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:29:12,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:29:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:29:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-06 22:29:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:29:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-06 22:29:12,221 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-11-06 22:29:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:12,221 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-06 22:29:12,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:29:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-06 22:29:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:29:12,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:12,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:12,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:29:12,223 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:12,224 INFO L82 PathProgramCache]: Analyzing trace with hash -651701326, now seen corresponding path program 1 times [2020-11-06 22:29:12,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:12,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309332999] [2020-11-06 22:29:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-06 22:29:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:12,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309332999] [2020-11-06 22:29:12,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:29:12,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:29:12,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502239753] [2020-11-06 22:29:12,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:29:12,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:12,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:29:12,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:29:12,376 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-11-06 22:29:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:12,479 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-06 22:29:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:29:12,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:29:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:12,481 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:29:12,481 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:29:12,482 INFO L677 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 [2020-11-06 22:29:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:29:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-06 22:29:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-06 22:29:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-06 22:29:12,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-11-06 22:29:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:12,491 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-06 22:29:12,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:29:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-06 22:29:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:29:12,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:12,492 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] [2020-11-06 22:29:12,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:29:12,492 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1404900848, now seen corresponding path program 1 times [2020-11-06 22:29:12,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:12,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189147054] [2020-11-06 22:29:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:29:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189147054] [2020-11-06 22:29:12,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415576326] [2020-11-06 22:29:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:12,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:29:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:12,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:12,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:29:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095618510] [2020-11-06 22:29:12,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:29:12,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:29:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:29:12,876 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-11-06 22:29:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:12,992 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-06 22:29:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:29:12,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-06 22:29:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:12,994 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:29:12,994 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:29:12,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:29:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:29:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-06 22:29:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:29:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-06 22:29:13,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-11-06 22:29:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:13,004 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-06 22:29:13,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:29:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-06 22:29:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:29:13,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:13,005 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] [2020-11-06 22:29:13,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:29:13,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 619831534, now seen corresponding path program 2 times [2020-11-06 22:29:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:13,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065438279] [2020-11-06 22:29:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:13,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:29:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:29:13,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065438279] [2020-11-06 22:29:13,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436880614] [2020-11-06 22:29:13,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-06 22:29:13,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 22:29:13,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:29:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:13,718 INFO L348 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-11-06 22:29:13,719 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-11-06 22:29:13,722 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:13,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:13,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:13,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-11-06 22:29:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:29:13,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:29:13,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-06 22:29:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243687383] [2020-11-06 22:29:13,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:29:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:29:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:29:13,760 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-11-06 22:29:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:13,860 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-11-06 22:29:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:29:13,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-06 22:29:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:13,862 INFO L225 Difference]: With dead ends: 35 [2020-11-06 22:29:13,862 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:29:13,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:29:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:29:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:29:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:29:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:29:13,870 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-11-06 22:29:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:13,870 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:29:13,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:29:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:29:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:29:13,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:13,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:14,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:14,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash -262276973, now seen corresponding path program 1 times [2020-11-06 22:29:14,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:14,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508092579] [2020-11-06 22:29:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 22:29:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:29:14,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508092579] [2020-11-06 22:29:14,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800054527] [2020-11-06 22:29:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:29:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:29:14,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:14,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:29:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711849519] [2020-11-06 22:29:14,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:29:14,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:29:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:29:14,380 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-11-06 22:29:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:14,487 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-06 22:29:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:29:14,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-06 22:29:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:14,489 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:29:14,489 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:29:14,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:29:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:29:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-06 22:29:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:29:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-06 22:29:14,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-11-06 22:29:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:14,496 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-06 22:29:14,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:29:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-06 22:29:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:29:14,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:14,497 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] [2020-11-06 22:29:14,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:14,711 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash -119910287, now seen corresponding path program 2 times [2020-11-06 22:29:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:14,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864862655] [2020-11-06 22:29:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 22:29:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:29:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864862655] [2020-11-06 22:29:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095870547] [2020-11-06 22:29:14,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-06 22:29:14,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:29:14,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:29:14,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:29:15,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:15,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:29:15,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003557720] [2020-11-06 22:29:15,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:29:15,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:15,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:29:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:15,003 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-11-06 22:29:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:15,113 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-11-06 22:29:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:29:15,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-06 22:29:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:15,115 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:29:15,115 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:29:15,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:29:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:29:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-06 22:29:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:29:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-06 22:29:15,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-11-06 22:29:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:15,122 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-06 22:29:15,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:29:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-06 22:29:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:29:15,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:15,123 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] [2020-11-06 22:29:15,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:15,338 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash -744478513, now seen corresponding path program 3 times [2020-11-06 22:29:15,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:15,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167330930] [2020-11-06 22:29:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:15,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-06 22:29:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:29:15,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167330930] [2020-11-06 22:29:15,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137507691] [2020-11-06 22:29:15,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-06 22:29:15,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 22:29:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:29:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:15,886 INFO L348 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-11-06 22:29:15,887 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-11-06 22:29:15,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:15,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:15,893 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:15,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-11-06 22:29:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:29:15,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:15,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-11-06 22:29:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120262087] [2020-11-06 22:29:15,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:29:15,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:29:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:29:15,924 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-11-06 22:29:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:16,167 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-06 22:29:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:29:16,168 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-11-06 22:29:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:16,169 INFO L225 Difference]: With dead ends: 50 [2020-11-06 22:29:16,169 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:29:16,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:29:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:29:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-06 22:29:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:29:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-06 22:29:16,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-11-06 22:29:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:16,176 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-06 22:29:16,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:29:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-06 22:29:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:29:16,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:16,177 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:16,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:29:16,390 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2048899694, now seen corresponding path program 4 times [2020-11-06 22:29:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:16,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594131222] [2020-11-06 22:29:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:16,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:16,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:29:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:29:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594131222] [2020-11-06 22:29:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917961739] [2020-11-06 22:29:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-11-06 22:29:16,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:29:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 22:29:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:16,756 INFO L348 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-11-06 22:29:16,756 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-11-06 22:29:16,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:16,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:16,761 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:16,761 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-11-06 22:29:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:29:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:16,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-11-06 22:29:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70235232] [2020-11-06 22:29:16,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:29:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:29:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:29:16,791 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 14 states. [2020-11-06 22:29:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:17,104 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-11-06 22:29:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:29:17,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-11-06 22:29:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:17,106 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:29:17,106 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:29:17,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:29:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:29:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-06 22:29:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:29:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:29:17,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-11-06 22:29:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:17,116 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:29:17,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:29:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:29:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:29:17,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:17,117 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:17,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:17,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1137991317, now seen corresponding path program 5 times [2020-11-06 22:29:17,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:17,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380749564] [2020-11-06 22:29:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:17,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:17,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:29:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:29:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380749564] [2020-11-06 22:29:17,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330251105] [2020-11-06 22:29:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-11-06 22:29:19,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-06 22:29:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:29:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:29:19,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:19,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-06 22:29:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871910745] [2020-11-06 22:29:19,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:29:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:29:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:29:19,630 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-11-06 22:29:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:19,742 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-06 22:29:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:29:19,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-11-06 22:29:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:19,743 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:29:19,743 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:29:19,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:29:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:29:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-11-06 22:29:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:29:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-11-06 22:29:19,750 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-11-06 22:29:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:19,750 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-11-06 22:29:19,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:29:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-11-06 22:29:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:29:19,751 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:29:19,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:29:19,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:29:19,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:29:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:29:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash -819603085, now seen corresponding path program 6 times [2020-11-06 22:29:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:29:19,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825221529] [2020-11-06 22:29:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:29:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:29:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-06 22:29:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:29:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:29:20,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825221529] [2020-11-06 22:29:20,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743873336] [2020-11-06 22:29:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-11-06 22:29:20,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-06 22:29:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:29:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-06 22:29:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:29:20,426 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-06 22:29:20,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:20,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:20,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-06 22:29:20,449 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:29:20,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:29:20,461 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:29:20,462 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:43, output treesize:17 [2020-11-06 22:29:20,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:29:20,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:29:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-06 22:29:20,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:29:20,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-11-06 22:29:20,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553375298] [2020-11-06 22:29:20,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:29:20,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:29:20,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:29:20,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:29:20,728 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-11-06 22:29:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:29:21,182 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-11-06 22:29:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 22:29:21,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-11-06 22:29:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:29:21,184 INFO L225 Difference]: With dead ends: 59 [2020-11-06 22:29:21,184 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:29:21,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:29:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:29:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:29:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:29:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:29:21,187 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-11-06 22:29:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:29:21,187 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:29:21,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:29:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:29:21,188 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:29:21,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:29:21,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:29:21,522 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,523 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:29:21,523 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,523 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:29:21,523 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,523 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:21,523 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:29:21,524 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point L29-2(lines 29 32) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L269 CegarLoopResult]: At program point L29-3(lines 29 32) the Hoare annotation is: true [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point L29-4(lines 23 52) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point L50(line 50) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2020-11-06 22:29:21,524 INFO L266 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-11-06 22:29:21,525 INFO L266 CegarLoopResult]: For program point L42-1(lines 42 44) no Hoare annotation was computed. [2020-11-06 22:29:21,525 INFO L266 CegarLoopResult]: For program point L34(lines 34 46) no Hoare annotation was computed. [2020-11-06 22:29:21,525 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 22 52) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-11-06 22:29:21,525 INFO L262 CegarLoopResult]: At program point L43(lines 23 52) the Hoare annotation is: false [2020-11-06 22:29:21,525 INFO L266 CegarLoopResult]: For program point L39-1(lines 39 41) no Hoare annotation was computed. [2020-11-06 22:29:21,525 INFO L266 CegarLoopResult]: For program point L37(lines 37 45) no Hoare annotation was computed. [2020-11-06 22:29:21,525 INFO L262 CegarLoopResult]: At program point L39-3(lines 39 41) the Hoare annotation is: (and (= (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|) main_~pa~0.base) (< main_~i~0 (+ (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset) 1)) (= (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4) main_~pa~0.offset)) [2020-11-06 22:29:21,525 INFO L262 CegarLoopResult]: At program point L39-4(lines 39 41) the Hoare annotation is: (let ((.cse0 (select (select |#memory_$Pointer$.base| |main_~#cont~0.base|) |main_~#cont~0.offset|)) (.cse1 (+ (select (select |#memory_$Pointer$.offset| |main_~#cont~0.base|) |main_~#cont~0.offset|) 4))) (and (= .cse0 main_~pa~0.base) (< main_~i~0 (+ (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset) 1)) (<= (select (select |#memory_int| .cse0) .cse1) main_~i~0) (= .cse1 main_~pa~0.offset))) [2020-11-06 22:29:21,525 INFO L269 CegarLoopResult]: At program point checkENTRY(lines 17 20) the Hoare annotation is: true [2020-11-06 22:29:21,526 INFO L266 CegarLoopResult]: For program point checkFINAL(lines 17 20) no Hoare annotation was computed. [2020-11-06 22:29:21,526 INFO L266 CegarLoopResult]: For program point checkEXIT(lines 17 20) no Hoare annotation was computed. [2020-11-06 22:29:21,541 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-11-06 22:29:21,542 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-11-06 22:29:21,543 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,543 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:21,544 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,545 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-11-06 22:29:21,546 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-11-06 22:29:21,546 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,546 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:21,546 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:29:21 BoogieIcfgContainer [2020-11-06 22:29:21,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:29:21,553 INFO L168 Benchmark]: Toolchain (without parser) took 10966.93 ms. Allocated memory was 155.2 MB in the beginning and 204.5 MB in the end (delta: 49.3 MB). Free memory was 129.7 MB in the beginning and 78.9 MB in the end (delta: 50.8 MB). Peak memory consumption was 101.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,554 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory was 128.6 MB in the beginning and 128.3 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:29:21,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 155.2 MB. Free memory was 129.2 MB in the beginning and 119.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,564 INFO L168 Benchmark]: Boogie Preprocessor took 42.93 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,564 INFO L168 Benchmark]: RCFGBuilder took 459.83 ms. Allocated memory is still 155.2 MB. Free memory was 117.5 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,566 INFO L168 Benchmark]: TraceAbstraction took 10188.48 ms. Allocated memory was 155.2 MB in the beginning and 204.5 MB in the end (delta: 49.3 MB). Free memory was 100.3 MB in the beginning and 78.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:29:21,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory was 128.6 MB in the beginning and 128.3 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.43 ms. Allocated memory is still 155.2 MB. Free memory was 129.2 MB in the beginning and 119.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.93 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 459.83 ms. Allocated memory is still 155.2 MB. Free memory was 117.5 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10188.48 ms. Allocated memory was 155.2 MB in the beginning and 204.5 MB in the end (delta: 49.3 MB). Free memory was 100.3 MB in the beginning and 78.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 23]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 39]: Loop Invariant [2020-11-06 22:29:21,585 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-11-06 22:29:21,585 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-11-06 22:29:21,585 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,585 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:21,586 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,586 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-11-06 22:29:21,587 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-11-06 22:29:21,587 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-11-06 22:29:21,587 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-06 22:29:21,587 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: (#memory_$Pointer$[cont][cont] == pa && i < unknown-#memory_int-unknown[pa][pa] + 1) && #memory_$Pointer$[cont][cont] + 4 == pa - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.9s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 176 SDtfs, 71 SDslu, 563 SDs, 0 SdLazy, 681 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 335 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 29 PreInvPairs, 42 NumberOfFragments, 113 HoareAnnotationTreeSize, 29 FomulaSimplifications, 132 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 505 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 487 ConstructedInterpolants, 9 QuantifiedInterpolants, 49599 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1413 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 155/360 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...