/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/fermat1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:01:12,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:01:12,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:01:12,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:01:12,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:01:12,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:01:12,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:01:12,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:01:12,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:01:12,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:01:12,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:01:12,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:01:12,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:01:12,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:01:12,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:01:12,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:01:12,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:01:12,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:01:12,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:01:12,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:01:12,873 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 15:01:12,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:01:12,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:01:12,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:01:12,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:01:12,912 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:01:12,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:01:12,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:01:12,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:01:12,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:01:12,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:01:12,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:01:12,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:01:12,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:12,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:01:12,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:01:12,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:01:13,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:01:13,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:01:13,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:01:13,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:01:13,200 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:01:13,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-05-02 15:01:13,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51ac51b/09ab4023b20e418984be1b8eee4ec8f3/FLAG4e0149377 [2021-05-02 15:01:13,651 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:01:13,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-05-02 15:01:13,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51ac51b/09ab4023b20e418984be1b8eee4ec8f3/FLAG4e0149377 [2021-05-02 15:01:13,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51ac51b/09ab4023b20e418984be1b8eee4ec8f3 [2021-05-02 15:01:13,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:01:13,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:01:13,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:13,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:01:13,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:01:13,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71891601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13, skipping insertion in model container [2021-05-02 15:01:13,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:01:13,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:01:13,824 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/fermat1-ll_unwindbound1.c[535,548] [2021-05-02 15:01:13,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:13,881 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:01:13,890 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/fermat1-ll_unwindbound1.c[535,548] [2021-05-02 15:01:13,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:13,905 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:01:13,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13 WrapperNode [2021-05-02 15:01:13,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:13,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:01:13,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:01:13,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:01:13,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (1/1) ... [2021-05-02 15:01:13,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:01:13,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:01:13,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:01:13,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:01:13,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (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 15:01:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:01:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:01:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:01:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:01:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:01:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:01:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:01:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:01:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:01:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:01:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:01:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:01:13,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:01:13,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:01:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:01:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:01:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:01:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:01:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:01:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:01:14,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:01:14,266 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:01:14,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:14 BoogieIcfgContainer [2021-05-02 15:01:14,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:01:14,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:01:14,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:01:14,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:01:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:01:13" (1/3) ... [2021-05-02 15:01:14,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2732acca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:14, skipping insertion in model container [2021-05-02 15:01:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:13" (2/3) ... [2021-05-02 15:01:14,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2732acca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:14, skipping insertion in model container [2021-05-02 15:01:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:14" (3/3) ... [2021-05-02 15:01:14,272 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound1.c [2021-05-02 15:01:14,275 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:01:14,279 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:01:14,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:01:14,316 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:01:14,316 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:01:14,316 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:01:14,316 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:01:14,317 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:01:14,317 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:01:14,317 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:01:14,317 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:01:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:01:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:01:14,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:14,330 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:14,331 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2021-05-02 15:01:14,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:14,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206365775] [2021-05-02 15:01:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:14,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:14,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483701211] [2021-05-02 15:01:14,400 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 15:01:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:01:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:01:14,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206365775] [2021-05-02 15:01:14,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:14,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483701211] [2021-05-02 15:01:14,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483701211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:14,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:14,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:01:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321976274] [2021-05-02 15:01:14,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:01:14,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:01:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:01:14,618 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:14,631 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2021-05-02 15:01:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:01:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:01:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:14,637 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:01:14,637 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:01:14,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:01:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:01:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:01:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:01:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 15:01:14,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-02 15:01:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:14,666 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 15:01:14,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 15:01:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:01:14,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:14,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:14,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:01:14,872 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2021-05-02 15:01:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:14,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544836457] [2021-05-02 15:01:14,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:14,889 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426530583] [2021-05-02 15:01:14,889 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 15:01:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:01:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:14,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:01:15,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:15,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544836457] [2021-05-02 15:01:15,090 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:15,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426530583] [2021-05-02 15:01:15,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426530583] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:15,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:15,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:01:15,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710984075] [2021-05-02 15:01:15,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:01:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:01:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:01:15,092 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:15,108 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 15:01:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:01:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:01:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:15,109 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:01:15,110 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:01:15,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:01:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:01:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:01:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:01:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 15:01:15,117 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-02 15:01:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:15,118 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 15:01:15,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 15:01:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:01:15,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:15,125 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:15,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:15,326 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:15,327 INFO L82 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2021-05-02 15:01:15,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:15,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894767597] [2021-05-02 15:01:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:15,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:15,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405117748] [2021-05-02 15:01:15,337 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 15:01:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:01:15,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:15,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:01:15,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894767597] [2021-05-02 15:01:15,533 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405117748] [2021-05-02 15:01:15,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405117748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:15,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:15,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031944212] [2021-05-02 15:01:15,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:15,535 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:21,717 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:01:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:01:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:01:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:21,718 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:01:21,719 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:01:21,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:01:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:01:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-02 15:01:21,728 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-02 15:01:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:21,729 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-02 15:01:21,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-02 15:01:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:01:21,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:21,730 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:21,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:21,937 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2021-05-02 15:01:21,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:21,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15809406] [2021-05-02 15:01:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:21,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:21,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691902687] [2021-05-02 15:01:21,948 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 15:01:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:01:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:22,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:01:22,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:22,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15809406] [2021-05-02 15:01:22,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691902687] [2021-05-02 15:01:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691902687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:22,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:22,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:01:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107961400] [2021-05-02 15:01:22,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:01:22,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:01:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:22,300 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:01:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:36,980 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2021-05-02 15:01:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:01:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:01:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:36,984 INFO L225 Difference]: With dead ends: 72 [2021-05-02 15:01:36,984 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:01:36,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:01:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:01:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-05-02 15:01:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 47 states have internal predecessors, (57), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:01:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2021-05-02 15:01:36,994 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 29 [2021-05-02 15:01:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:36,994 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2021-05-02 15:01:36,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:01:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2021-05-02 15:01:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 15:01:36,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:36,995 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:37,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:37,196 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2021-05-02 15:01:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:37,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760543856] [2021-05-02 15:01:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:37,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:37,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973195250] [2021-05-02 15:01:37,208 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 15:01:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:01:37,258 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:01:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:01:37,273 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:01:37,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:01:37,305 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:01:37,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:37,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:01:37 BoogieIcfgContainer [2021-05-02 15:01:37,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:01:37,533 INFO L168 Benchmark]: Toolchain (without parser) took 23848.26 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 138.8 MB in the beginning and 91.8 MB in the end (delta: 47.0 MB). Peak memory consumption was 83.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:37,533 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 174.1 MB. Free memory was 155.2 MB in the beginning and 155.1 MB in the end (delta: 104.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:01:37,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.75 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 155.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:37,533 INFO L168 Benchmark]: Boogie Preprocessor took 28.97 ms. Allocated memory is still 174.1 MB. Free memory was 155.7 MB in the beginning and 154.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:37,534 INFO L168 Benchmark]: RCFGBuilder took 331.75 ms. Allocated memory is still 174.1 MB. Free memory was 154.4 MB in the beginning and 137.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:37,534 INFO L168 Benchmark]: TraceAbstraction took 23264.36 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 137.2 MB in the beginning and 91.8 MB in the end (delta: 45.4 MB). Peak memory consumption was 82.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:37,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 174.1 MB. Free memory was 155.2 MB in the beginning and 155.1 MB in the end (delta: 104.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.75 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 155.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.97 ms. Allocated memory is still 174.1 MB. Free memory was 155.7 MB in the beginning and 154.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 331.75 ms. Allocated memory is still 174.1 MB. Free memory was 154.4 MB in the beginning and 137.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23264.36 ms. Allocated memory was 174.1 MB in the beginning and 209.7 MB in the end (delta: 35.7 MB). Free memory was 137.2 MB in the beginning and 91.8 MB in the end (delta: 45.4 MB). Peak memory consumption was 82.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=11, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=3, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=3, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=3, counter=0, r=1, R=2, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=1, counter++=0, r=1, R=2, u=5, v=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=1, r=1, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=3, counter=1, R=2, r=1, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=3, counter=2, counter++=1, R=2, r=1, u=5, v=1] [L39] COND FALSE !(counter++<1) [L47] EXPR counter++ VAL [\old(counter)=0, A=3, counter=3, counter++=2, R=2, r=1, u=5, v=1] [L47] COND FALSE !(counter++<1) [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=4, counter++=3, r=1, R=2, u=5, v=1] [L34] COND FALSE !(counter++<1) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23191.7ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 8.3ms, AutomataDifference: 20919.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 146 SDtfs, 78 SDslu, 435 SDs, 0 SdLazy, 282 SolverSat, 17 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 20656.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 232.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 58.5ms SsaConstructionTime, 127.9ms SatisfiabilityAnalysisTime, 640.1ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 7 QuantifiedInterpolants, 441 SizeOfPredicates, 9 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 11/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...