/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:29:18,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:29:18,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:29:18,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:29:18,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:29:18,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:29:18,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:29:18,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:29:18,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:29:18,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:29:18,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:29:18,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:29:18,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:29:18,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:29:18,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:29:18,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:29:18,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:29:18,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:29:18,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:29:18,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:29:18,402 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 [2021-05-02 14:29:18,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:29:18,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:29:18,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:29:18,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:29:18,428 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:29:18,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:29:18,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:29:18,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:29:18,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:29:18,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:29:18,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:29:18,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:29:18,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:29:18,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:29:18,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:29:18,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:29:18,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:29:18,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:29:18,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:29:18,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:29:18,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:29:18,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:29:18,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:29:18,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:29:18,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:29:18,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:29:18,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:29:18,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:29:18,749 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:29:18,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i [2021-05-02 14:29:18,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6c501d2/eb03d89446da48689564fcafb08c8aef/FLAG547cbf33c [2021-05-02 14:29:19,271 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:29:19,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i [2021-05-02 14:29:19,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6c501d2/eb03d89446da48689564fcafb08c8aef/FLAG547cbf33c [2021-05-02 14:29:19,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc6c501d2/eb03d89446da48689564fcafb08c8aef [2021-05-02 14:29:19,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:29:19,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:29:19,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:29:19,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:29:19,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:29:19,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa0b94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19, skipping insertion in model container [2021-05-02 14:29:19,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:29:19,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:29:19,447 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i[959,972] [2021-05-02 14:29:19,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:29:19,475 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:29:19,498 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound1.i[959,972] [2021-05-02 14:29:19,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:29:19,547 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:29:19,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19 WrapperNode [2021-05-02 14:29:19,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:29:19,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:29:19,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:29:19,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:29:19,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (1/1) ... [2021-05-02 14:29:19,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:29:19,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:29:19,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:29:19,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:29:19,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (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 [2021-05-02 14:29:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:29:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:29:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:29:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:29:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:29:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:29:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:29:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:29:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:29:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:29:19,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:29:19,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:29:19,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:29:19 BoogieIcfgContainer [2021-05-02 14:29:19,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:29:19,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:29:19,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:29:19,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:29:19,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:29:19" (1/3) ... [2021-05-02 14:29:19,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee90b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:29:19, skipping insertion in model container [2021-05-02 14:29:19,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:29:19" (2/3) ... [2021-05-02 14:29:19,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee90b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:29:19, skipping insertion in model container [2021-05-02 14:29:19,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:29:19" (3/3) ... [2021-05-02 14:29:19,926 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2021-05-02 14:29:19,930 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:29:19,932 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:29:19,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:29:19,961 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:29:19,962 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:29:19,962 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:29:19,962 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:29:19,962 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:29:19,962 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:29:19,962 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:29:19,962 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:29:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:29:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:29:19,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:19,977 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:29:19,978 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-02 14:29:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987060322] [2021-05-02 14:29:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:29:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:20,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:29:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:29:20,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987060322] [2021-05-02 14:29:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987060322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:29:20,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:29:20,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:29:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962366736] [2021-05-02 14:29:20,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:29:20,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:29:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:29:20,289 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:20,388 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-02 14:29:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:29:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 14:29:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:20,396 INFO L225 Difference]: With dead ends: 51 [2021-05-02 14:29:20,396 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 14:29:20,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:29:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 14:29:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 14:29:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:29:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 14:29:20,428 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 14:29:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:20,429 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 14:29:20,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 14:29:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 14:29:20,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:20,430 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:29:20,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:29:20,430 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-02 14:29:20,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:20,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299274546] [2021-05-02 14:29:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:20,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:29:20,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490494159] [2021-05-02 14:29:20,447 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 [2021-05-02 14:29:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:29:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:29:20,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:29:20,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299274546] [2021-05-02 14:29:20,808 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:29:20,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490494159] [2021-05-02 14:29:20,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490494159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:29:20,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:29:20,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:29:20,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459561849] [2021-05-02 14:29:20,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:29:20,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:29:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:29:20,811 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:20,987 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 14:29:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:29:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 14:29:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:20,989 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:29:20,989 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:29:20,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:29:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:29:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:29:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:29:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 14:29:20,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 14:29:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:21,000 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 14:29:21,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 14:29:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 14:29:21,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:21,001 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:29:21,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:29:21,221 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-02 14:29:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339678278] [2021-05-02 14:29:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:21,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:29:21,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640158161] [2021-05-02 14:29:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:29:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:21,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:29:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:29:21,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:21,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:29:21,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339678278] [2021-05-02 14:29:21,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:29:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640158161] [2021-05-02 14:29:21,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640158161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:29:21,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:29:21,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:29:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793118897] [2021-05-02 14:29:21,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:29:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:29:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:29:21,632 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:21,806 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-02 14:29:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:29:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 14:29:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:21,808 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:29:21,808 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:29:21,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:29:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:29:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:29:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:29:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 14:29:21,816 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 14:29:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:21,817 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 14:29:21,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:29:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 14:29:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:29:21,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:21,818 INFO L523 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, 1, 1] [2021-05-02 14:29:22,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:29:22,042 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-02 14:29:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:22,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777528487] [2021-05-02 14:29:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:22,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:29:22,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652600265] [2021-05-02 14:29:22,056 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 [2021-05-02 14:29:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:29:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:29:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:29:22,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777528487] [2021-05-02 14:29:22,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:29:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652600265] [2021-05-02 14:29:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652600265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:29:22,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:29:22,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:29:22,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013114574] [2021-05-02 14:29:22,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:29:22,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:29:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:29:22,211 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:29:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:22,240 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 14:29:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:29:22,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 14:29:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:22,242 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:29:22,242 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:29:22,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:29:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:29:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:29:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:29:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 14:29:22,259 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 14:29:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:22,259 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 14:29:22,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:29:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 14:29:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:29:22,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:22,262 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:29:22,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:29:22,477 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-02 14:29:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:22,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009654921] [2021-05-02 14:29:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:22,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:29:22,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307406165] [2021-05-02 14:29:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 14:29:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:29:22,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:29:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:29:22,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:22,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:22,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:22,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:29:22,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:22,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009654921] [2021-05-02 14:29:22,774 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:29:22,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307406165] [2021-05-02 14:29:22,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307406165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:29:22,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:29:22,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:29:22,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711913349] [2021-05-02 14:29:22,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:29:22,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:29:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:29:22,776 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:29:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:22,910 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-02 14:29:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:29:22,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:29:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:22,913 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:29:22,913 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:29:22,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:29:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:29:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:29:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:29:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-02 14:29:22,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 29 [2021-05-02 14:29:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:22,926 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-02 14:29:22,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:29:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-02 14:29:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:29:22,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:29:22,929 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:29:23,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:29:23,152 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:29:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:29:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash -758101483, now seen corresponding path program 2 times [2021-05-02 14:29:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:29:23,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639105105] [2021-05-02 14:29:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:29:23,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:29:23,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646369474] [2021-05-02 14:29:23,163 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 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 [2021-05-02 14:29:23,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:29:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:29:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:29:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:29:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:23,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:23,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:29:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:29:23,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:29:23,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639105105] [2021-05-02 14:29:23,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:29:23,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646369474] [2021-05-02 14:29:23,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646369474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:29:23,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:29:23,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:29:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900313112] [2021-05-02 14:29:23,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:29:23,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:29:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:29:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:29:23,495 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:29:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:29:23,584 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 14:29:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:29:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 14:29:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:29:23,585 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:29:23,585 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:29:23,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:29:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:29:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:29:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:29:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:29:23,586 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-05-02 14:29:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:29:23,587 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:29:23,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:29:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:29:23,587 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:29:23,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:29:23,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:29:24,075 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-05-02 14:29:24,194 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-05-02 14:29:24,286 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:29:24,287 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:29:24,287 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2021-05-02 14:29:24,287 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L201 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L194 CegarLoopUtils]: At program point L38-1(lines 38 47) the Hoare annotation is: (let ((.cse3 (mod main_~r~0 4294967296)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse1 (= main_~b~0 1)) (.cse4 (<= (mod main_~A~0 4294967296) 1))) (or (and .cse0 .cse1 .cse2 (< .cse3 (mod main_~b~0 4294967296))) (and (<= 1 .cse3) .cse0 .cse2 .cse4) (let ((.cse5 (+ main_~b~0 main_~r~0))) (and .cse1 (= .cse5 main_~A~0) (<= 1 (mod .cse5 4294967296)) (= main_~q~0 1) .cse4)))) [2021-05-02 14:29:24,288 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= (mod main_~A~0 4294967296) 1)) (.cse3 (= main_~B~0 1))) (or (and (<= 1 (mod main_~r~0 4294967296)) .cse0 .cse1 (= main_~b~0 2) .cse2 .cse3) (and .cse0 .cse1 (= main_~B~0 main_~b~0) .cse2 .cse3))) [2021-05-02 14:29:24,288 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 25 50) the Hoare annotation is: true [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L198 CegarLoopUtils]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:29:24,288 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse1 (= main_~B~0 main_~b~0)) (.cse6 (mod main_~r~0 4294967296)) (.cse4 (= main_~q~0 0)) (.cse5 (= main_~A~0 main_~r~0)) (.cse2 (<= (mod main_~A~0 4294967296) 1)) (.cse3 (= main_~B~0 1))) (or (let ((.cse0 (+ main_~b~0 main_~r~0))) (and (= .cse0 main_~A~0) .cse1 (<= 1 (mod .cse0 4294967296)) (= main_~q~0 1) .cse2 .cse3)) (and .cse4 .cse5 (< .cse6 (mod main_~b~0 4294967296)) .cse1 .cse3) (and (<= 1 .cse6) .cse4 .cse5 (= main_~b~0 2) .cse2 .cse3))) [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-05-02 14:29:24,289 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-05-02 14:29:24,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:29:24 BoogieIcfgContainer [2021-05-02 14:29:24,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:29:24,302 INFO L168 Benchmark]: Toolchain (without parser) took 5007.34 ms. Allocated memory was 181.4 MB in the beginning and 235.9 MB in the end (delta: 54.5 MB). Free memory was 145.5 MB in the beginning and 180.0 MB in the end (delta: -34.5 MB). Peak memory consumption was 108.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:29:24,302 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:29:24,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.78 ms. Allocated memory is still 181.4 MB. Free memory was 145.3 MB in the beginning and 164.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:29:24,302 INFO L168 Benchmark]: Boogie Preprocessor took 30.50 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 162.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:29:24,302 INFO L168 Benchmark]: RCFGBuilder took 341.02 ms. Allocated memory is still 181.4 MB. Free memory was 162.7 MB in the beginning and 147.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:29:24,302 INFO L168 Benchmark]: TraceAbstraction took 4379.81 ms. Allocated memory was 181.4 MB in the beginning and 235.9 MB in the end (delta: 54.5 MB). Free memory was 146.5 MB in the beginning and 180.0 MB in the end (delta: -33.6 MB). Peak memory consumption was 110.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:29:24,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.78 ms. Allocated memory is still 181.4 MB. Free memory was 145.3 MB in the beginning and 164.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.50 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 162.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.02 ms. Allocated memory is still 181.4 MB. Free memory was 162.7 MB in the beginning and 147.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4379.81 ms. Allocated memory was 181.4 MB in the beginning and 235.9 MB in the end (delta: 54.5 MB). Free memory was 146.5 MB in the beginning and 180.0 MB in the end (delta: -33.6 MB). Peak memory consumption was 110.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3848.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 11.9ms, AutomataDifference: 745.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 477.3ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 139 SDtfs, 96 SDslu, 429 SDs, 0 SdLazy, 350 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 382.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 583.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 24 PreInvPairs, 32 NumberOfFragments, 203 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 92.0ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 354 FormulaSimplificationTreeSizeReductionInter, 377.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 78.0ms SsaConstructionTime, 211.4ms SatisfiabilityAnalysisTime, 1284.8ms InterpolantComputationTime, 151 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 781 SizeOfPredicates, 12 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 19/30 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((1 <= r % 4294967296 && q == 0) && A == r) && b == 2) && A % 4294967296 <= 1) && B == 1) || ((((q == 0 && A == r) && B == b) && A % 4294967296 <= 1) && B == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...