/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_unwindbound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:28:13,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:28:13,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:28:13,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:28:13,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:28:13,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:28:13,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:28:13,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:28:13,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:28:13,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:28:13,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:28:13,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:28:13,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:28:13,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:28:13,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:28:13,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:28:13,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:28:13,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:28:13,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:28:13,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:28:13,292 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 14:28:13,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:28:13,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:28:13,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:28:13,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:28:13,332 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:28:13,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:28:13,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:28:13,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:28:13,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:28:13,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:28:13,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:28:13,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:28:13,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:28:13,334 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:28:13,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:28:13,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:28:13,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:28:13,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:28:13,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:28:13,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:28:13,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:28:13,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:28:13,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:28:13,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:28:13,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:28:13,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:28:13,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:28:13,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:28:13,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:28:13,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:28:13,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:28:13,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:28:13,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:28:13,732 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:28:13,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-02 14:28:13,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6339460ee/1de844b4b9934c5ab51576b8f493392a/FLAG443cbcd81 [2021-05-02 14:28:14,229 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:28:14,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound2.i [2021-05-02 14:28:14,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6339460ee/1de844b4b9934c5ab51576b8f493392a/FLAG443cbcd81 [2021-05-02 14:28:14,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6339460ee/1de844b4b9934c5ab51576b8f493392a [2021-05-02 14:28:14,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:28:14,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:28:14,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:28:14,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:28:14,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:28:14,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d05b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14, skipping insertion in model container [2021-05-02 14:28:14,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:28:14,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:28:14,382 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_unwindbound2.i[959,972] [2021-05-02 14:28:14,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:28:14,400 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:28:14,433 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_unwindbound2.i[959,972] [2021-05-02 14:28:14,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:28:14,473 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:28:14,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14 WrapperNode [2021-05-02 14:28:14,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:28:14,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:28:14,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:28:14,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:28:14,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (1/1) ... [2021-05-02 14:28:14,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:28:14,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:28:14,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:28:14,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:28:14,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (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 14:28:14,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:28:14,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:28:14,599 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:28:14,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:28:14,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:28:14,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:28:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:28:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:28:14,600 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:28:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:28:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:28:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:28:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:28:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:28:14,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:28:14,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:28:14,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:28:14,920 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:28:14,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:28:14 BoogieIcfgContainer [2021-05-02 14:28:14,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:28:14,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:28:14,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:28:14,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:28:14,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:28:14" (1/3) ... [2021-05-02 14:28:14,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c8da90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:28:14, skipping insertion in model container [2021-05-02 14:28:14,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:14" (2/3) ... [2021-05-02 14:28:14,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c8da90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:28:14, skipping insertion in model container [2021-05-02 14:28:14,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:28:14" (3/3) ... [2021-05-02 14:28:14,945 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-05-02 14:28:14,950 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:28:14,953 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:28:14,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:28:14,994 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:28:14,994 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:28:14,994 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:28:14,994 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:28:14,994 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:28:14,994 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:28:14,995 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:28:14,995 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:28:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:28:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 14:28:15,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:15,011 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:15,011 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2021-05-02 14:28:15,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:15,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258753151] [2021-05-02 14:28:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:28:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:15,186 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 14:28:15,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:15,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258753151] [2021-05-02 14:28:15,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258753151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:15,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:15,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:28:15,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724476355] [2021-05-02 14:28:15,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:28:15,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:28:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:15,204 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:15,287 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 14:28:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:28:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 14:28:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:15,296 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:28:15,296 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 14:28:15,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 14:28:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 14:28:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-02 14:28:15,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-02 14:28:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:15,336 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-02 14:28:15,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-02 14:28:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 14:28:15,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:15,337 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:15,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:28:15,338 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2021-05-02 14:28:15,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:15,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879438902] [2021-05-02 14:28:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:15,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:28:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:15,522 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 14:28:15,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:15,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879438902] [2021-05-02 14:28:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879438902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:15,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:15,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:28:15,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326303037] [2021-05-02 14:28:15,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:15,525 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:15,708 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 14:28:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 14:28:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:15,712 INFO L225 Difference]: With dead ends: 35 [2021-05-02 14:28:15,712 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 14:28:15,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 14:28:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 14:28:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 14:28:15,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-02 14:28:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:15,723 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 14:28:15,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 14:28:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 14:28:15,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:15,724 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:15,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:28:15,726 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2021-05-02 14:28:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:15,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6489198] [2021-05-02 14:28:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:15,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:15,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565476970] [2021-05-02 14:28:15,754 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 14:28:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:28:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:15,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:15,947 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 14:28:15,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:15,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6489198] [2021-05-02 14:28:15,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:15,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565476970] [2021-05-02 14:28:15,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565476970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:15,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:15,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:28:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113687202] [2021-05-02 14:28:15,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:15,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:15,950 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:15,971 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 14:28:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:28:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 14:28:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:15,973 INFO L225 Difference]: With dead ends: 34 [2021-05-02 14:28:15,973 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 14:28:15,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 14:28:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 14:28:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-02 14:28:15,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-02 14:28:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:15,978 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-02 14:28:15,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-02 14:28:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 14:28:15,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:15,979 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:16,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:28:16,202 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2021-05-02 14:28:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:16,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248172703] [2021-05-02 14:28:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:16,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:16,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171016214] [2021-05-02 14:28:16,217 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 14:28:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:16,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:28:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:16,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,400 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 14:28:16,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248172703] [2021-05-02 14:28:16,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171016214] [2021-05-02 14:28:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171016214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:16,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:16,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:28:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213810980] [2021-05-02 14:28:16,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:16,403 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:16,453 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-02 14:28:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 14:28:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:16,455 INFO L225 Difference]: With dead ends: 35 [2021-05-02 14:28:16,455 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:28:16,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:28:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:28:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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 14:28:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 14:28:16,461 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-02 14:28:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:16,461 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 14:28:16,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 14:28:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:28:16,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:16,462 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:16,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:16,671 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2021-05-02 14:28:16,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:16,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62552220] [2021-05-02 14:28:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:16,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:16,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244237496] [2021-05-02 14:28:16,701 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 14:28:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:28:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:16,838 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 14:28:16,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62552220] [2021-05-02 14:28:16,839 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:16,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244237496] [2021-05-02 14:28:16,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244237496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:16,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:16,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:28:16,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903400507] [2021-05-02 14:28:16,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:16,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:16,841 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:16,868 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-05-02 14:28:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 14:28:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:16,869 INFO L225 Difference]: With dead ends: 46 [2021-05-02 14:28:16,869 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:28:16,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:28:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:28:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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 14:28:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 14:28:16,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-02 14:28:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:16,875 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 14:28:16,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 14:28:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:28:16,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:16,876 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:17,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:17,097 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2021-05-02 14:28:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734273336] [2021-05-02 14:28:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:17,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:17,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518467875] [2021-05-02 14:28:17,106 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 14:28:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:28:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:17,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:17,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734273336] [2021-05-02 14:28:17,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518467875] [2021-05-02 14:28:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518467875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:17,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:17,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:28:17,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168831276] [2021-05-02 14:28:17,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:17,313 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:17,414 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-05-02 14:28:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 14:28:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:17,416 INFO L225 Difference]: With dead ends: 46 [2021-05-02 14:28:17,416 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:28:17,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:28:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 14:28:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 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 14:28:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-05-02 14:28:17,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 18 [2021-05-02 14:28:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:17,422 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-05-02 14:28:17,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 14:28:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-05-02 14:28:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:28:17,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:17,425 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:17,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:17,647 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 1 times [2021-05-02 14:28:17,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:17,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485001802] [2021-05-02 14:28:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:17,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:17,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754901265] [2021-05-02 14:28:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:28:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:17,748 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 14:28:17,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:17,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485001802] [2021-05-02 14:28:17,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:17,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754901265] [2021-05-02 14:28:17,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754901265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:17,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:17,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:28:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082156131] [2021-05-02 14:28:17,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:28:17,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:28:17,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:17,750 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:17,763 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 14:28:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:28:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-02 14:28:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:17,764 INFO L225 Difference]: With dead ends: 55 [2021-05-02 14:28:17,764 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:28:17,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:28:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:28:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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 14:28:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-02 14:28:17,768 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-02 14:28:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:17,769 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-02 14:28:17,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-02 14:28:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:28:17,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:17,770 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] [2021-05-02 14:28:17,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:28:17,985 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:17,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 1 times [2021-05-02 14:28:17,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:17,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177306278] [2021-05-02 14:28:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:18,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:18,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669411938] [2021-05-02 14:28:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:28:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:18,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 14:28:18,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177306278] [2021-05-02 14:28:18,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:18,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669411938] [2021-05-02 14:28:18,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669411938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:18,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:18,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:28:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006344453] [2021-05-02 14:28:18,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:18,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:18,175 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:18,207 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 14:28:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 14:28:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:18,207 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:28:18,208 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:28:18,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:28:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:28:18,208 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 14:28:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:28:18,209 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-05-02 14:28:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:18,209 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:28:18,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:28:18,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:28:18,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:18,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:28:18,731 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:28:18,733 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)|) (= ~counter~0 |old(~counter~0)|) (= |#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 14:28:18,733 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 14:28:18,733 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:18,733 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 47) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0))) (or (and (<= 1 (mod main_~r~0 4294967296)) .cse0 .cse1) (and .cse0 (= main_~b~0 1) .cse1) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0))) (or (and (<= 1 (mod main_~r~0 4294967296)) (<= 1 ~counter~0) .cse0 .cse1) (and .cse0 .cse1 (= main_~B~0 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~B~0 1)) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:28:18,734 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 26 50) the Hoare annotation is: (or (not (= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:18,734 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (or (and (= main_~q~0 0) (= main_~A~0 main_~r~0) (< (mod main_~r~0 4294967296) (mod main_~b~0 4294967296)) (= main_~B~0 main_~b~0) (= main_~B~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 14:28:18,734 INFO L198 CegarLoopUtils]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-05-02 14:28:18,735 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-05-02 14:28:18,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:28:18 BoogieIcfgContainer [2021-05-02 14:28:18,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:28:18,754 INFO L168 Benchmark]: Toolchain (without parser) took 4502.79 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 156.5 MB in the beginning and 183.0 MB in the end (delta: -26.5 MB). Peak memory consumption was 93.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:18,754 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:28:18,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.37 ms. Allocated memory is still 191.9 MB. Free memory was 156.3 MB in the beginning and 174.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:18,754 INFO L168 Benchmark]: Boogie Preprocessor took 43.10 ms. Allocated memory is still 191.9 MB. Free memory was 174.4 MB in the beginning and 172.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:18,754 INFO L168 Benchmark]: RCFGBuilder took 402.27 ms. Allocated memory is still 191.9 MB. Free memory was 172.7 MB in the beginning and 157.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:18,754 INFO L168 Benchmark]: TraceAbstraction took 3829.97 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 156.6 MB in the beginning and 183.0 MB in the end (delta: -26.4 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:18,755 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 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.37 ms. Allocated memory is still 191.9 MB. Free memory was 156.3 MB in the beginning and 174.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.10 ms. Allocated memory is still 191.9 MB. Free memory was 174.4 MB in the beginning and 172.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 402.27 ms. Allocated memory is still 191.9 MB. Free memory was 172.7 MB in the beginning and 157.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3829.97 ms. Allocated memory was 191.9 MB in the beginning and 239.1 MB in the end (delta: 47.2 MB). Free memory was 156.6 MB in the beginning and 183.0 MB in the end (delta: -26.4 MB). Peak memory consumption was 94.4 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: 3421.3ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 10.9ms, AutomataDifference: 554.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 318.9ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 182 SDtfs, 46 SDslu, 348 SDs, 0 SdLazy, 204 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 292.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 274.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 22 PreInvPairs, 27 NumberOfFragments, 133 HoareAnnotationTreeSize, 22 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 68.1ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 168 FormulaSimplificationTreeSizeReductionInter, 244.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 63.2ms SsaConstructionTime, 227.5ms SatisfiabilityAnalysisTime, 798.6ms InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 11 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 11/16 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 && 1 <= counter) && q == 0) && A == r) || ((((q == 0 && A == r) && B == b) && counter == \old(counter)) && B == 1)) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...