/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/fermat2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:07:44,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:07:44,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:07:44,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:07:44,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:07:44,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:07:44,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:07:44,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:07:44,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:07:44,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:07:44,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:07:44,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:07:44,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:07:44,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:07:44,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:07:44,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:07:44,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:07:44,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:07:44,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:07:44,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:07:44,424 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 15:07:44,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:07:44,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:07:44,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:07:44,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:07:44,464 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:07:44,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:07:44,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:07:44,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:07:44,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:07:44,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:07:44,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:07:44,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:07:44,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:07:44,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:07:44,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:07:44,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:07:44,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:07:44,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:07:44,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:07:44,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:07:44,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:07:44,704 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:07:44,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-02 15:07:44,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a73b768/9fc398f80c784223a42809e3602d3e7d/FLAGe75f501a5 [2021-05-02 15:07:45,118 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:07:45,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-02 15:07:45,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a73b768/9fc398f80c784223a42809e3602d3e7d/FLAGe75f501a5 [2021-05-02 15:07:45,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a73b768/9fc398f80c784223a42809e3602d3e7d [2021-05-02 15:07:45,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:07:45,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:07:45,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:07:45,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:07:45,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:07:45,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d93961f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45, skipping insertion in model container [2021-05-02 15:07:45,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:07:45,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:07:45,286 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/fermat2-ll_unwindbound1.c[524,537] [2021-05-02 15:07:45,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:07:45,306 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:07:45,316 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/fermat2-ll_unwindbound1.c[524,537] [2021-05-02 15:07:45,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:07:45,342 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:07:45,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45 WrapperNode [2021-05-02 15:07:45,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:07:45,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:07:45,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:07:45,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:07:45,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (1/1) ... [2021-05-02 15:07:45,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:07:45,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:07:45,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:07:45,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:07:45,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (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 15:07:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:07:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:07:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:07:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:07:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:07:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:07:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:07:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:07:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:07:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:07:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:07:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:07:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:07:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:07:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:07:45,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:07:45,640 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:07:45,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:07:45 BoogieIcfgContainer [2021-05-02 15:07:45,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:07:45,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:07:45,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:07:45,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:07:45,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:07:45" (1/3) ... [2021-05-02 15:07:45,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66313801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:07:45, skipping insertion in model container [2021-05-02 15:07:45,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:45" (2/3) ... [2021-05-02 15:07:45,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66313801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:07:45, skipping insertion in model container [2021-05-02 15:07:45,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:07:45" (3/3) ... [2021-05-02 15:07:45,646 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.c [2021-05-02 15:07:45,649 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:07:45,651 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:07:45,661 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:07:45,674 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:07:45,674 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:07:45,674 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:07:45,674 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:07:45,674 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:07:45,674 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:07:45,674 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:07:45,675 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:07:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:07:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:07:45,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:45,687 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 15:07:45,687 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 15:07:45,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:45,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109895590] [2021-05-02 15:07:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:45,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:45,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434824852] [2021-05-02 15:07:45,794 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 15:07:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:07:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:45,936 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 15:07:45,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:45,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109895590] [2021-05-02 15:07:45,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:45,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434824852] [2021-05-02 15:07:45,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434824852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:07:45,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:07:45,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:07:45,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24850767] [2021-05-02 15:07:45,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:07:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:45,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:07:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:07:45,955 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 15:07:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:45,971 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:07:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:07:45,972 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 15:07:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:45,977 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:07:45,977 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:07:45,979 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 15:07:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:07:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:07:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:07:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 15:07:46,007 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 15:07:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:46,007 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 15:07:46,007 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 15:07:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 15:07:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:07:46,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:46,009 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 15:07:46,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:07:46,224 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 15:07:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:46,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558573951] [2021-05-02 15:07:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:46,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:46,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622803009] [2021-05-02 15:07:46,253 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 15:07:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:07:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:46,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,371 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 15:07:46,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558573951] [2021-05-02 15:07:46,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:46,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622803009] [2021-05-02 15:07:46,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622803009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:07:46,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:07:46,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:07:46,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125300284] [2021-05-02 15:07:46,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:07:46,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:07:46,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:07:46,374 INFO L87 Difference]: Start difference. First operand 25 states and 29 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 15:07:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:46,383 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 15:07:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:07:46,383 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 15:07:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:46,384 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:07:46,384 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:07:46,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:07:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:07:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:07:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:07:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:07:46,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 15:07:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:46,389 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:07:46,389 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 15:07:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:07:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:07:46,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:46,390 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 15:07:46,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:46,605 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 15:07:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:46,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051246128] [2021-05-02 15:07:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:46,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:46,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215398857] [2021-05-02 15:07:46,618 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 15:07:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:07:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:46,868 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 15:07:46,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051246128] [2021-05-02 15:07:46,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215398857] [2021-05-02 15:07:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215398857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:46,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:46,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:07:46,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490749400] [2021-05-02 15:07:46,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:07:46,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:46,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:07:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:07:46,870 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 15:07:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:56,489 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 15:07:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:07:56,489 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 15:07:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:56,490 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:07:56,490 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:07:56,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:07:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:07:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 15:07:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:07:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:07:56,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:07:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:56,496 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:07:56,497 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 15:07:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:07:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:07:56,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:56,497 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 15:07:56,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:56,701 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 15:07:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:56,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-02 15:07:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:56,712 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:56,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716024296] [2021-05-02 15:07:56,712 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 15:07:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:56,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:07:56,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:56,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,042 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 15:07:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-02 15:07:57,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716024296] [2021-05-02 15:07:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716024296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:07:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381282386] [2021-05-02 15:07:57,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:07:57,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:07:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:07:57,044 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 15:08:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:08:07,551 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 15:08:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:08:07,552 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 15:08:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:08:07,553 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:08:07,553 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:08:07,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2148.1ms TimeCoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2021-05-02 15:08:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:08:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:08:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:08:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:08:07,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-05-02 15:08:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:08:07,558 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:08:07,559 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 15:08:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:08:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:08:07,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:08:07,559 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] [2021-05-02 15:08:07,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:08:07,773 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:08:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:08:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 15:08:07,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:08:07,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404043942] [2021-05-02 15:08:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:08:07,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:08:07,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63625312] [2021-05-02 15:08:07,789 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 15:08:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:08:07,868 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:08:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:08:07,882 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:08:07,940 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:08:07,940 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:08:08,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:08:08,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:08:08 BoogieIcfgContainer [2021-05-02 15:08:08,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:08:08,167 INFO L168 Benchmark]: Toolchain (without parser) took 23024.28 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 147.2 MB in the beginning and 118.2 MB in the end (delta: 29.1 MB). Peak memory consumption was 67.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:08:08,167 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 182.5 MB. Free memory was 164.6 MB in the beginning and 164.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:08:08,167 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.82 ms. Allocated memory is still 182.5 MB. Free memory was 147.0 MB in the beginning and 137.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:08:08,167 INFO L168 Benchmark]: Boogie Preprocessor took 47.13 ms. Allocated memory is still 182.5 MB. Free memory was 137.3 MB in the beginning and 165.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:08:08,167 INFO L168 Benchmark]: RCFGBuilder took 245.18 ms. Allocated memory is still 182.5 MB. Free memory was 165.7 MB in the beginning and 150.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:08:08,167 INFO L168 Benchmark]: TraceAbstraction took 22524.80 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 150.0 MB in the beginning and 118.2 MB in the end (delta: 31.9 MB). Peak memory consumption was 69.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:08:08,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 182.5 MB. Free memory was 164.6 MB in the beginning and 164.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 200.82 ms. Allocated memory is still 182.5 MB. Free memory was 147.0 MB in the beginning and 137.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.13 ms. Allocated memory is still 182.5 MB. Free memory was 137.3 MB in the beginning and 165.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 245.18 ms. Allocated memory is still 182.5 MB. Free memory was 165.7 MB in the beginning and 150.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22524.80 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 150.0 MB in the beginning and 118.2 MB in the end (delta: 31.9 MB). Peak memory consumption was 69.5 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)=19, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] 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] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=7, counter=0, R=3] [L28] 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] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=3] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=3, r=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, r=2, R=3, u=7, 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=7, counter=1, r=2, R=3, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, R=3, r=2, u=7, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=1, R=3, r=1, u=7, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, r=1, R=3, u=7, v=3] [L34] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22468.5ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 7.6ms, AutomataDifference: 20181.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 99 SDtfs, 37 SDslu, 247 SDs, 0 SdLazy, 186 SolverSat, 7 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 17959.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2230.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, 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: 31.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.3ms SsaConstructionTime, 175.8ms SatisfiabilityAnalysisTime, 572.6ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 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...