/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/geo1-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:44:53,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:44:53,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:44:53,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:44:53,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:44:53,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:44:53,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:44:53,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:44:53,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:44:53,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:44:53,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:44:53,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:44:53,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:44:53,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:44:53,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:44:53,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:44:53,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:44:53,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:44:53,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:44:53,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:44:53,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:44:53,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:44:53,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:44:53,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:44:53,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:44:53,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:44:53,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:44:53,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:53,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:44:53,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:44:53,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:44:53,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:44:53,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:44:53,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:44:53,947 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:44:53,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound20.c [2021-05-06 02:44:54,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8142d81/3c7b15b36d36475bba400633ea99e913/FLAG3457b0016 [2021-05-06 02:44:54,300 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:44:54,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound20.c [2021-05-06 02:44:54,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8142d81/3c7b15b36d36475bba400633ea99e913/FLAG3457b0016 [2021-05-06 02:44:54,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8142d81/3c7b15b36d36475bba400633ea99e913 [2021-05-06 02:44:54,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:44:54,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:44:54,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:54,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:44:54,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:44:54,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e6fc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54, skipping insertion in model container [2021-05-06 02:44:54,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:44:54,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:44:54,841 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/geo1-u_unwindbound20.c[563,576] [2021-05-06 02:44:54,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:54,854 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:44:54,862 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/geo1-u_unwindbound20.c[563,576] [2021-05-06 02:44:54,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:54,874 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:44:54,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54 WrapperNode [2021-05-06 02:44:54,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:54,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:44:54,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:44:54,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:44:54,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... [2021-05-06 02:44:54,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:44:54,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:44:54,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:44:54,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:44:54,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:44:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:44:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:44:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:44:55,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:44:55,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:44:55,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:44:55,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:44:55,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:44:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:44:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:44:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:44:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:44:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:44:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:44:55,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:44:55,250 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:44:55,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:55 BoogieIcfgContainer [2021-05-06 02:44:55,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:44:55,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:44:55,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:44:55,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:44:55,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:44:54" (1/3) ... [2021-05-06 02:44:55,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29370080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:55, skipping insertion in model container [2021-05-06 02:44:55,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:54" (2/3) ... [2021-05-06 02:44:55,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29370080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:55, skipping insertion in model container [2021-05-06 02:44:55,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:55" (3/3) ... [2021-05-06 02:44:55,256 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_unwindbound20.c [2021-05-06 02:44:55,276 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:44:55,279 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:44:55,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:44:55,324 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:44:55,324 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:44:55,324 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:44:55,324 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:44:55,324 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:44:55,324 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:44:55,324 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:44:55,324 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:44:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:44:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:55,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:55,340 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:55,340 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1864317590, now seen corresponding path program 1 times [2021-05-06 02:44:55,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:55,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579191823] [2021-05-06 02:44:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:55,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:44:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:44:55,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:55,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579191823] [2021-05-06 02:44:55,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579191823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:55,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:55,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:44:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168376534] [2021-05-06 02:44:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:44:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:44:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:55,595 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:55,669 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-06 02:44:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:44:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:44:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:55,676 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:44:55,677 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:44:55,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:44:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 02:44:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:44:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-06 02:44:55,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-06 02:44:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:55,710 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-06 02:44:55,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-06 02:44:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:55,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:55,711 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:55,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:44:55,712 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2049175951, now seen corresponding path program 1 times [2021-05-06 02:44:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014774843] [2021-05-06 02:44:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:55,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:55,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168043775] [2021-05-06 02:44:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:44:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:55,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:44:55,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:55,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014774843] [2021-05-06 02:44:55,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:55,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168043775] [2021-05-06 02:44:55,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168043775] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:55,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:55,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:44:55,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463700856] [2021-05-06 02:44:55,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:44:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:44:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:44:55,947 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:55,996 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-05-06 02:44:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:44:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:44:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:55,997 INFO L225 Difference]: With dead ends: 29 [2021-05-06 02:44:55,997 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:44:55,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:44:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:44:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-06 02:44:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:44:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:44:56,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2021-05-06 02:44:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:56,017 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:44:56,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:44:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 02:44:56,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:56,018 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:56,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:44:56,236 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -975399299, now seen corresponding path program 1 times [2021-05-06 02:44:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68151588] [2021-05-06 02:44:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:56,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:56,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019092999] [2021-05-06 02:44:56,246 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 [2021-05-06 02:44:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:44:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:56,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:56,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:56,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:56,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:44:56,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68151588] [2021-05-06 02:44:56,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019092999] [2021-05-06 02:44:56,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019092999] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:56,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:56,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:44:56,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776133502] [2021-05-06 02:44:56,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:44:56,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:56,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:44:56,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:56,353 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:56,363 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-05-06 02:44:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:44:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 02:44:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:56,365 INFO L225 Difference]: With dead ends: 33 [2021-05-06 02:44:56,365 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:44:56,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:44:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:44:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:44:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:44:56,370 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2021-05-06 02:44:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:56,370 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:44:56,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:44:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 02:44:56,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:56,371 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:56,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:56,589 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash 198190047, now seen corresponding path program 1 times [2021-05-06 02:44:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134968023] [2021-05-06 02:44:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:56,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:56,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815585061] [2021-05-06 02:44:56,600 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 [2021-05-06 02:44:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:56,662 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:56,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:56,697 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:44:56,698 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:44:56,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:56,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:44:56 BoogieIcfgContainer [2021-05-06 02:44:56,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:44:56,934 INFO L168 Benchmark]: Toolchain (without parser) took 2199.00 ms. Allocated memory is still 178.3 MB. Free memory was 143.2 MB in the beginning and 59.3 MB in the end (delta: 83.9 MB). Peak memory consumption was 84.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:56,934 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:44:56,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.48 ms. Allocated memory is still 178.3 MB. Free memory was 143.0 MB in the beginning and 133.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:56,935 INFO L168 Benchmark]: Boogie Preprocessor took 18.91 ms. Allocated memory is still 178.3 MB. Free memory was 133.3 MB in the beginning and 131.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:56,935 INFO L168 Benchmark]: RCFGBuilder took 356.61 ms. Allocated memory is still 178.3 MB. Free memory was 131.8 MB in the beginning and 147.4 MB in the end (delta: -15.6 MB). Peak memory consumption was 9.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:56,935 INFO L168 Benchmark]: TraceAbstraction took 1681.48 ms. Allocated memory is still 178.3 MB. Free memory was 146.9 MB in the beginning and 59.3 MB in the end (delta: 87.6 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:56,937 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 138.48 ms. Allocated memory is still 178.3 MB. Free memory was 143.0 MB in the beginning and 133.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.91 ms. Allocated memory is still 178.3 MB. Free memory was 133.3 MB in the beginning and 131.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.61 ms. Allocated memory is still 178.3 MB. Free memory was 131.8 MB in the beginning and 147.4 MB in the end (delta: -15.6 MB). Peak memory consumption was 9.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1681.48 ms. Allocated memory is still 178.3 MB. Free memory was 146.9 MB in the beginning and 59.3 MB in the end (delta: 87.6 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=16, counter=0] [L24] unsigned int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_unsigned_int() [L27] k = __VERIFIER_nondet_unsigned_int() [L29] x = 1 [L30] y = z [L31] c = 1 VAL [\old(counter)=0, c=1, counter=0, x=1, y=0, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, c=1, counter=1, counter++=0, x=1, y=0, z=0] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(counter)=0, c=1, counter=1, x=1, y=0, z=0] [L36] COND TRUE !(c < k) VAL [\old(counter)=0, c=1, counter=1, k=0, x=1, y=0, z=0] [L45] x = x * (z - 1) VAL [\old(counter)=0, c=1, counter=1, k=0, x=4294967295, y=0, z=0] [L47] CALL __VERIFIER_assert(1 + x - y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1596.3ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.5ms, AutomataDifference: 159.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 13 SDslu, 79 SDs, 0 SdLazy, 41 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 73.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.7ms SsaConstructionTime, 108.3ms SatisfiabilityAnalysisTime, 319.0ms InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 2 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...