/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/loop-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 00:08:08,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 00:08:08,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 00:08:08,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 00:08:08,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 00:08:08,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 00:08:08,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 00:08:08,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 00:08:08,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 00:08:08,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 00:08:08,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 00:08:08,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 00:08:08,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 00:08:08,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 00:08:08,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 00:08:08,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 00:08:08,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 00:08:08,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 00:08:08,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 00:08:08,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 00:08:08,330 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 [2021-05-06 00:08:08,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 00:08:08,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 00:08:08,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 00:08:08,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 00:08:08,379 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 00:08:08,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 00:08:08,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 00:08:08,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 00:08:08,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 00:08:08,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 00:08:08,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 00:08:08,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 00:08:08,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 00:08:08,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 00:08:08,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 00:08:08,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:08:08,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 00:08:08,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 00:08:08,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 00:08:08,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 00:08:08,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 00:08:08,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 00:08:08,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 00:08:08,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 00:08:08,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 00:08:08,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 00:08:08,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 00:08:08,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 00:08:08,735 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 00:08:08,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2021-05-06 00:08:08,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c2855c4/fd26c0ee60284c72bc16c0cb5bdf880b/FLAG548006f94 [2021-05-06 00:08:09,207 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 00:08:09,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2021-05-06 00:08:09,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c2855c4/fd26c0ee60284c72bc16c0cb5bdf880b/FLAG548006f94 [2021-05-06 00:08:09,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c2855c4/fd26c0ee60284c72bc16c0cb5bdf880b [2021-05-06 00:08:09,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 00:08:09,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 00:08:09,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 00:08:09,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 00:08:09,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 00:08:09,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252722bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09, skipping insertion in model container [2021-05-06 00:08:09,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 00:08:09,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 00:08:09,410 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i[895,908] [2021-05-06 00:08:09,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:08:09,433 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 00:08:09,444 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i[895,908] [2021-05-06 00:08:09,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:08:09,463 INFO L208 MainTranslator]: Completed translation [2021-05-06 00:08:09,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09 WrapperNode [2021-05-06 00:08:09,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 00:08:09,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 00:08:09,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 00:08:09,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 00:08:09,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... [2021-05-06 00:08:09,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 00:08:09,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 00:08:09,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 00:08:09,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 00:08:09,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:08:09,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 00:08:09,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 00:08:09,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 00:08:09,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 00:08:09,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 00:08:09,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 00:08:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 00:08:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 00:08:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 00:08:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 00:08:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 00:08:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 00:08:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 00:08:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 00:08:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 00:08:09,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 00:08:09,878 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 00:08:09,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:08:09 BoogieIcfgContainer [2021-05-06 00:08:09,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 00:08:09,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 00:08:09,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 00:08:09,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 00:08:09,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:08:09" (1/3) ... [2021-05-06 00:08:09,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea5e315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:08:09, skipping insertion in model container [2021-05-06 00:08:09,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:08:09" (2/3) ... [2021-05-06 00:08:09,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea5e315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:08:09, skipping insertion in model container [2021-05-06 00:08:09,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:08:09" (3/3) ... [2021-05-06 00:08:09,885 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2021-05-06 00:08:09,901 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 00:08:09,904 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 00:08:09,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 00:08:09,940 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 00:08:09,940 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 00:08:09,941 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 00:08:09,941 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 00:08:09,941 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 00:08:09,941 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 00:08:09,941 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 00:08:09,941 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 00:08:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 00:08:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 00:08:09,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:08:09,961 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:08:09,962 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:08:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:08:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash 253912119, now seen corresponding path program 1 times [2021-05-06 00:08:09,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:08:09,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488131080] [2021-05-06 00:08:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:08:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:10,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 00:08:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:08:10,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:08:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488131080] [2021-05-06 00:08:10,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488131080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 00:08:10,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 00:08:10,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 00:08:10,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552432871] [2021-05-06 00:08:10,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 00:08:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:08:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 00:08:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 00:08:10,207 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-05-06 00:08:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:08:10,315 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 00:08:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 00:08:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2021-05-06 00:08:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:08:10,321 INFO L225 Difference]: With dead ends: 33 [2021-05-06 00:08:10,321 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 00:08:10,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 00:08:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 00:08:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 00:08:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-05-06 00:08:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 00:08:10,355 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 00:08:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:08:10,356 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 00:08:10,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2021-05-06 00:08:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 00:08:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 00:08:10,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:08:10,357 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:08:10,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 00:08:10,358 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:08:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:08:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -684163825, now seen corresponding path program 1 times [2021-05-06 00:08:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:08:10,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132950289] [2021-05-06 00:08:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:08:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:10,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 00:08:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:08:10,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:08:10,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132950289] [2021-05-06 00:08:10,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132950289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:08:10,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366676639] [2021-05-06 00:08:10,624 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 [2021-05-06 00:08:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 00:08:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:08:10,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:08:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366676639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:08:10,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 00:08:10,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-06 00:08:10,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419157468] [2021-05-06 00:08:10,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:08:10,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:08:10,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:08:10,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:08:10,981 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:08:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:08:11,207 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-06 00:08:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:08:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 00:08:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:08:11,208 INFO L225 Difference]: With dead ends: 20 [2021-05-06 00:08:11,208 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 00:08:11,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:08:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 00:08:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 00:08:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-05-06 00:08:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 00:08:11,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-06 00:08:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:08:11,214 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 00:08:11,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:08:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 00:08:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 00:08:11,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:08:11,215 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:08:11,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 00:08:11,437 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:08:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:08:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash 300252983, now seen corresponding path program 2 times [2021-05-06 00:08:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:08:11,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951968881] [2021-05-06 00:08:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:08:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:11,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 00:08:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:08:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:08:11,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:08:11,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951968881] [2021-05-06 00:08:11,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951968881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:08:11,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988085045] [2021-05-06 00:08:11,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:08:11,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:08:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:08:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 00:08:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:08:11,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:11,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:12,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:12,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:12,884 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 606 [2021-05-06 00:08:12,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:08:13,000 WARN L159 QuantifierPusher]: Ignoring assumption.