/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/loop-invariants/even.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:07:02,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:07:02,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:07:02,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 14:07:02,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 14:07:02,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 14:07:02,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 14:07:02,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 14:07:02,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 14:07:02,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 14:07:02,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 14:07:02,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 14:07:02,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:07:02,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:07:02,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:07:02,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:07:02,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:07:02,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:07:02,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:07:02,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:07:02,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:07:02,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:07:02,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:07:02,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:07:02,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 14:07:02,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 14:07:02,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 14:07:02,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 14:07:02,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 14:07:02,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 14:07:02,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 14:07:02,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 14:07:02,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 14:07:02,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 14:07:02,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 14:07:02,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 14:07:02,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 14:07:02,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 14:07:02,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:07:02,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:07:02,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:07:02,520 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 [2021-02-23 14:07:02,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:07:02,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:07:02,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:07:02,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:07:02,587 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:07:02,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:07:02,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:07:02,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:07:02,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:07:02,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:07:02,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:07:02,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:07:02,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:07:02,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:07:02,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:07:02,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:07:02,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:07:02,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:07:02,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:07:02,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:07:02,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:07:02,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:07:02,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:07:02,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:07:02,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:07:02,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:07:02,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:07:02,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:07:02,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:07:03,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:07:03,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:07:03,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:07:03,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:07:03,098 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:07:03,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/even.c [2021-02-23 14:07:03,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e285f9864/56810ecc22694f619279d5a2f67ce5cd/FLAGd395a5dbe [2021-02-23 14:07:03,873 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:07:03,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c [2021-02-23 14:07:03,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e285f9864/56810ecc22694f619279d5a2f67ce5cd/FLAGd395a5dbe [2021-02-23 14:07:04,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e285f9864/56810ecc22694f619279d5a2f67ce5cd [2021-02-23 14:07:04,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:07:04,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:07:04,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:07:04,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:07:04,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:07:04,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8551c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04, skipping insertion in model container [2021-02-23 14:07:04,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:07:04,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:07:04,449 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[351,364] [2021-02-23 14:07:04,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:07:04,475 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:07:04,490 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[351,364] [2021-02-23 14:07:04,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:07:04,510 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:07:04,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04 WrapperNode [2021-02-23 14:07:04,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:07:04,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:07:04,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:07:04,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:07:04,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (1/1) ... [2021-02-23 14:07:04,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:07:04,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:07:04,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:07:04,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:07:04,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (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 [2021-02-23 14:07:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:07:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:07:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:07:04,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 14:07:04,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:07:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:07:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:07:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:07:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:07:04,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:07:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:07:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:07:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:07:04,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:07:04,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 14:07:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:07:04 BoogieIcfgContainer [2021-02-23 14:07:04,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:07:04,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:07:04,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:07:04,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:07:04,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:07:04" (1/3) ... [2021-02-23 14:07:04,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5416fcbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:07:04, skipping insertion in model container [2021-02-23 14:07:04,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:07:04" (2/3) ... [2021-02-23 14:07:04,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5416fcbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:07:04, skipping insertion in model container [2021-02-23 14:07:04,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:07:04" (3/3) ... [2021-02-23 14:07:04,903 INFO L111 eAbstractionObserver]: Analyzing ICFG even.c [2021-02-23 14:07:04,912 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:07:04,919 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:07:04,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:07:05,017 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:07:05,017 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:07:05,018 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:07:05,018 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:07:05,023 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:07:05,024 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:07:05,024 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:07:05,024 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:07:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-02-23 14:07:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-23 14:07:05,084 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:07:05,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:07:05,086 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:07:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:07:05,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1035305623, now seen corresponding path program 1 times [2021-02-23 14:07:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:07:05,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969985075] [2021-02-23 14:07:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:07:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:05,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:07:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:05,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:07:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969985075] [2021-02-23 14:07:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:07:05,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 14:07:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149105320] [2021-02-23 14:07:05,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 14:07:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:07:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 14:07:05,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 14:07:05,504 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-02-23 14:07:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:07:05,567 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-02-23 14:07:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 14:07:05,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-02-23 14:07:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:07:05,579 INFO L225 Difference]: With dead ends: 32 [2021-02-23 14:07:05,579 INFO L226 Difference]: Without dead ends: 13 [2021-02-23 14:07:05,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 14:07:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-02-23 14:07:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-02-23 14:07:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-02-23 14:07:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-02-23 14:07:05,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-02-23 14:07:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:07:05,628 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-02-23 14:07:05,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 14:07:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-02-23 14:07:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 14:07:05,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:07:05,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:07:05,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:07:05,630 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:07:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:07:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2042096758, now seen corresponding path program 1 times [2021-02-23 14:07:05,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:07:05,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058745320] [2021-02-23 14:07:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:07:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:05,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:05,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 14:07:05,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 14:07:05,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:07:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:05,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:05,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:07:05,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058745320] [2021-02-23 14:07:05,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:07:05,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:07:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415914825] [2021-02-23 14:07:05,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:07:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:07:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:07:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:07:05,803 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2021-02-23 14:07:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:07:05,958 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-02-23 14:07:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 14:07:05,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-02-23 14:07:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:07:05,960 INFO L225 Difference]: With dead ends: 20 [2021-02-23 14:07:05,961 INFO L226 Difference]: Without dead ends: 15 [2021-02-23 14:07:05,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 14:07:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-02-23 14:07:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-02-23 14:07:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-02-23 14:07:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-02-23 14:07:05,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-02-23 14:07:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:07:05,972 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-02-23 14:07:05,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:07:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-02-23 14:07:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-23 14:07:05,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:07:05,973 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:07:05,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:07:05,974 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:07:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:07:05,975 INFO L82 PathProgramCache]: Analyzing trace with hash 615626395, now seen corresponding path program 1 times [2021-02-23 14:07:05,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:07:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704176524] [2021-02-23 14:07:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:07:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:06,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,103 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 14:07:06,107 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 14:07:06,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 14:07:06,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 14:07:06,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:07:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:06,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:07:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704176524] [2021-02-23 14:07:06,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190707662] [2021-02-23 14:07:06,271 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 [2021-02-23 14:07:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:07:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-23 14:07:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-23 14:07:06,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:07:06,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 14:07:06,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:07:06,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 14:07:06,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:07:06,499 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-23 14:07:06,500 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-23 14:07:06,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:07:06,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:07:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:07:06,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-23 14:07:06,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-23 14:07:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326122590] [2021-02-23 14:07:06,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 14:07:06,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:07:06,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 14:07:06,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-23 14:07:06,508 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2021-02-23 14:07:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:07:06,732 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-02-23 14:07:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 14:07:06,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-02-23 14:07:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:07:06,734 INFO L225 Difference]: With dead ends: 18 [2021-02-23 14:07:06,734 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 14:07:06,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-23 14:07:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 14:07:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 14:07:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 14:07:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 14:07:06,736 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-02-23 14:07:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:07:06,736 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 14:07:06,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 14:07:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 14:07:06,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 14:07:06,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-23 14:07:06,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 14:07:07,203 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 14:07:07,203 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 14:07:07,203 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 14:07:07,203 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 14:07:07,204 INFO L185 CegarLoopUtils]: 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|)) [2021-02-23 14:07:07,204 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 14:07:07,204 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 14:07:07,204 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 14:07:07,204 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 14:07:07,204 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 14:07:07,205 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-02-23 14:07:07,205 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2021-02-23 14:07:07,205 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-02-23 14:07:07,205 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2021-02-23 14:07:07,205 INFO L189 CegarLoopUtils]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2021-02-23 14:07:07,205 INFO L185 CegarLoopUtils]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2021-02-23 14:07:07,206 INFO L185 CegarLoopUtils]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2021-02-23 14:07:07,206 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-23 14:07:07,206 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-02-23 14:07:07,206 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-23 14:07:07,206 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-02-23 14:07:07,206 INFO L189 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-02-23 14:07:07,207 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-02-23 14:07:07,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 02:07:07 BoogieIcfgContainer [2021-02-23 14:07:07,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 14:07:07,225 INFO L168 Benchmark]: Toolchain (without parser) took 2984.52 ms. Allocated memory was 155.2 MB in the beginning and 187.7 MB in the end (delta: 32.5 MB). Free memory was 131.0 MB in the beginning and 96.9 MB in the end (delta: 34.1 MB). Peak memory consumption was 67.9 MB. Max. memory is 8.0 GB. [2021-02-23 14:07:07,226 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 14:07:07,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.64 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 14:07:07,227 INFO L168 Benchmark]: Boogie Preprocessor took 38.74 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 14:07:07,228 INFO L168 Benchmark]: RCFGBuilder took 340.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 106.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-23 14:07:07,228 INFO L168 Benchmark]: TraceAbstraction took 2330.02 ms. Allocated memory was 155.2 MB in the beginning and 187.7 MB in the end (delta: 32.5 MB). Free memory was 106.0 MB in the beginning and 96.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 42.8 MB. Max. memory is 8.0 GB. [2021-02-23 14:07:07,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.64 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.74 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 106.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2330.02 ms. Allocated memory was 155.2 MB in the beginning and 187.7 MB in the end (delta: 32.5 MB). Free memory was 106.0 MB in the beginning and 96.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 42.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 31 SDslu, 45 SDs, 0 SdLazy, 68 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 15 NumberOfFragments, 69 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 298 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 2491 SizeOfPredicates, 1 NumberOfNonLiveVariables, 107 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 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...