/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:09:43,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:09:43,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:09:43,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:09:43,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:09:43,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:09:43,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:09:43,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:09:43,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:09:43,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:09:43,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:09:43,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:09:43,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:09:44,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:09:44,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:09:44,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:09:44,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:09:44,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:09:44,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:09:44,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:09:44,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:09:44,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:09:44,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:09:44,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:09:44,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:09:44,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:09:44,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:09:44,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:09:44,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:09:44,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:09:44,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:09:44,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:09:44,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:09:44,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:09:44,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:09:44,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:09:44,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:09:44,108 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:09:44,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:09:44,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:09:44,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:09:44,114 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:09:44,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:09:44,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:09:44,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:09:44,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:09:44,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:09:44,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:09:44,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:09:44,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:09:44,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:09:44,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:09:44,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:09:44,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:09:44,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:09:44,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:09:44,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:09:44,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:09:44,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:09:44,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:09:44,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:09:44,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:09:44,595 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:09:44,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2020-12-22 05:09:44,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537414524/aedf6d03c3b545d0bca5d355b060d8bb/FLAGfec35dc65 [2020-12-22 05:09:45,298 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:09:45,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2020-12-22 05:09:45,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537414524/aedf6d03c3b545d0bca5d355b060d8bb/FLAGfec35dc65 [2020-12-22 05:09:45,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537414524/aedf6d03c3b545d0bca5d355b060d8bb [2020-12-22 05:09:45,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:09:45,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:09:45,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:09:45,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:09:45,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:09:45,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:45,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78012b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45, skipping insertion in model container [2020-12-22 05:09:45,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:45,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:09:45,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:09:45,896 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2020-12-22 05:09:45,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:09:45,922 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:09:45,936 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2020-12-22 05:09:45,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:09:45,961 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:09:45,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45 WrapperNode [2020-12-22 05:09:45,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:09:45,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:09:45,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:09:45,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:09:45,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:45,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:09:46,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:09:46,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:09:46,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:09:46,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (1/1) ... [2020-12-22 05:09:46,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:09:46,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:09:46,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:09:46,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:09:46,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (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 [2020-12-22 05:09:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:09:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:09:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:09:46,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:09:46,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:09:46,604 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-22 05:09:46,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:46 BoogieIcfgContainer [2020-12-22 05:09:46,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:09:46,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:09:46,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:09:46,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:09:46,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:09:45" (1/3) ... [2020-12-22 05:09:46,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62dad8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:09:46, skipping insertion in model container [2020-12-22 05:09:46,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:09:45" (2/3) ... [2020-12-22 05:09:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62dad8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:09:46, skipping insertion in model container [2020-12-22 05:09:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:46" (3/3) ... [2020-12-22 05:09:46,615 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2020-12-22 05:09:46,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:09:46,627 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:09:46,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:09:46,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:09:46,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:09:46,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:09:46,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:09:46,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:09:46,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:09:46,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:09:46,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:09:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-22 05:09:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:09:46,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:46,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:46,701 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -174569337, now seen corresponding path program 1 times [2020-12-22 05:09:46,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:46,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39035953] [2020-12-22 05:09:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:46,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39035953] [2020-12-22 05:09:46,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:46,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:09:46,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283783358] [2020-12-22 05:09:46,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:09:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:09:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:09:46,924 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-22 05:09:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:46,940 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2020-12-22 05:09:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:09:46,942 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-22 05:09:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:46,951 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:09:46,951 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 05:09:46,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:09:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 05:09:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 05:09:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:09:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 05:09:46,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-12-22 05:09:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:46,988 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 05:09:46,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:09:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 05:09:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:09:46,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:46,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:46,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:09:46,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:46,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1454099019, now seen corresponding path program 1 times [2020-12-22 05:09:46,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:46,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053343691] [2020-12-22 05:09:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:47,016 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:47,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549295322] [2020-12-22 05:09:47,016 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 [2020-12-22 05:09:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:09:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:47,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053343691] [2020-12-22 05:09:47,474 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:47,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549295322] [2020-12-22 05:09:47,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:47,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:09:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096457509] [2020-12-22 05:09:47,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:09:47,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:47,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:09:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:09:47,482 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-12-22 05:09:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:47,971 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-22 05:09:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:09:47,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-22 05:09:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:47,973 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:09:47,973 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:09:47,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:09:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:09:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-22 05:09:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:09:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-22 05:09:47,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-12-22 05:09:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:47,983 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-22 05:09:47,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:09:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-22 05:09:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:09:47,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:47,997 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:48,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:09:48,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1566788422, now seen corresponding path program 1 times [2020-12-22 05:09:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:48,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677969313] [2020-12-22 05:09:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:48,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:48,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118479135] [2020-12-22 05:09:48,254 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 [2020-12-22 05:09:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:09:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677969313] [2020-12-22 05:09:48,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:48,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118479135] [2020-12-22 05:09:48,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:48,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:09:48,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712414796] [2020-12-22 05:09:48,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:09:48,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:09:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:09:48,662 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-12-22 05:09:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:49,367 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-22 05:09:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:09:49,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-22 05:09:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:49,369 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:09:49,369 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 05:09:49,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:09:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 05:09:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2020-12-22 05:09:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 05:09:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-22 05:09:49,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-12-22 05:09:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:49,376 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-22 05:09:49,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:09:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-22 05:09:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:09:49,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:49,378 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:49,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:49,593 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash 890165184, now seen corresponding path program 1 times [2020-12-22 05:09:49,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:49,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591594675] [2020-12-22 05:09:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:49,622 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:49,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467677547] [2020-12-22 05:09:49,622 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 [2020-12-22 05:09:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:09:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:49,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591594675] [2020-12-22 05:09:49,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:49,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467677547] [2020-12-22 05:09:49,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:09:49,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:09:49,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358646607] [2020-12-22 05:09:49,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 05:09:49,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:49,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 05:09:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:09:49,710 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 3 states. [2020-12-22 05:09:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:49,742 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-22 05:09:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 05:09:49,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 05:09:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:49,744 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:09:49,744 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:09:49,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 05:09:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:09:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:09:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:09:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 05:09:49,751 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-12-22 05:09:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 05:09:49,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 05:09:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 05:09:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:09:49,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:49,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:49,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:49,965 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash 567763771, now seen corresponding path program 1 times [2020-12-22 05:09:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:49,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682633862] [2020-12-22 05:09:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:49,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:49,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523891706] [2020-12-22 05:09:49,991 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 [2020-12-22 05:09:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:09:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 05:09:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:09:50,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682633862] [2020-12-22 05:09:50,334 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:09:50,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523891706] [2020-12-22 05:09:50,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:09:50,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:09:50,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948150840] [2020-12-22 05:09:50,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:09:50,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:09:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:09:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:09:50,337 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 10 states. [2020-12-22 05:09:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:09:51,006 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-22 05:09:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:09:51,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-22 05:09:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:09:51,009 INFO L225 Difference]: With dead ends: 40 [2020-12-22 05:09:51,010 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 05:09:51,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:09:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 05:09:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-22 05:09:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 05:09:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-22 05:09:51,026 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-12-22 05:09:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:09:51,026 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-22 05:09:51,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:09:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-22 05:09:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:09:51,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:09:51,028 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:09:51,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:09:51,232 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:09:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:09:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -572229456, now seen corresponding path program 2 times [2020-12-22 05:09:51,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:09:51,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13551290] [2020-12-22 05:09:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:09:51,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:09:51,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073150031] [2020-12-22 05:09:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 05:09:52,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:09:52,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:09:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:09:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:09:53,345 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 26 [2020-12-22 05:09:53,500 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:09:53,849 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:10:20,324 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-22 05:10:20,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13551290] [2020-12-22 05:10:20,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:10:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073150031] [2020-12-22 05:10:20,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-22 05:10:20,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:10:20,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:10:20,329 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:10:20,329 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:10:20,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:10:20,556 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:10:20,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:10:20 BoogieIcfgContainer [2020-12-22 05:10:20,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:10:20,557 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:10:20,557 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:10:20,557 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:10:20,558 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:09:46" (3/4) ... [2020-12-22 05:10:20,561 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:10:20,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:10:20,563 INFO L168 Benchmark]: Toolchain (without parser) took 34933.68 ms. Allocated memory was 156.2 MB in the beginning and 957.3 MB in the end (delta: 801.1 MB). Free memory was 131.9 MB in the beginning and 714.3 MB in the end (delta: -582.4 MB). Peak memory consumption was 216.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,563 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:10:20,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.86 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,565 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.18 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,566 INFO L168 Benchmark]: Boogie Preprocessor took 26.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 119.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,566 INFO L168 Benchmark]: RCFGBuilder took 571.67 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 105.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,567 INFO L168 Benchmark]: TraceAbstraction took 33949.23 ms. Allocated memory was 156.2 MB in the beginning and 957.3 MB in the end (delta: 801.1 MB). Free memory was 104.5 MB in the beginning and 714.8 MB in the end (delta: -610.3 MB). Peak memory consumption was 569.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:10:20,568 INFO L168 Benchmark]: Witness Printer took 4.35 ms. Allocated memory is still 957.3 MB. Free memory was 714.8 MB in the beginning and 714.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:10:20,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.86 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.18 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.2 MB in the beginning and 119.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 571.67 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 105.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33949.23 ms. Allocated memory was 156.2 MB in the beginning and 957.3 MB in the end (delta: 801.1 MB). Free memory was 104.5 MB in the beginning and 714.8 MB in the end (delta: -610.3 MB). Peak memory consumption was 569.1 MB. Max. memory is 8.0 GB. * Witness Printer took 4.35 ms. Allocated memory is still 957.3 MB. Free memory was 714.8 MB in the beginning and 714.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 33.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 225 SDslu, 131 SDs, 0 SdLazy, 254 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 11533 SizeOfPredicates, 30 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/8 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...