/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/ps5-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:41:02,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:41:02,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:41:02,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:41:02,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:41:02,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:41:03,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:41:03,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:41:03,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:41:03,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:41:03,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:41:03,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:41:03,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:41:03,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:41:03,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:41:03,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:41:03,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:41:03,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:41:03,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:41:03,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:41:03,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:41:03,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:41:03,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:41:03,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:41:03,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:41:03,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:41:03,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:41:03,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:41:03,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:41:03,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:41:03,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:41:03,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:41:03,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:41:03,097 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:41:03,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:41:03,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:41:03,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:41:03,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:41:03,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:41:03,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:41:03,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:41:03,099 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:41:03,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:41:03,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:41:03,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:41:03,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:41:03,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:41:03,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:41:03,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:41:03,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:41:03,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:41:03,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:41:03,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:41:03,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:41:03,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:41:03,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:41:03,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:41:03,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:41:03,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:41:03,527 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:41:03,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2020-12-22 05:41:03,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68196b4ec/a487932394a84b57aae60f8c82e58c7f/FLAGe0f46105b [2020-12-22 05:41:04,200 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:41:04,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2020-12-22 05:41:04,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68196b4ec/a487932394a84b57aae60f8c82e58c7f/FLAGe0f46105b [2020-12-22 05:41:04,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68196b4ec/a487932394a84b57aae60f8c82e58c7f [2020-12-22 05:41:04,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:41:04,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:41:04,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:41:04,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:41:04,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:41:04,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be2bc8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04, skipping insertion in model container [2020-12-22 05:41:04,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:41:04,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:41:04,767 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/ps5-ll_unwindbound100.c[458,471] [2020-12-22 05:41:04,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:41:04,795 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:41:04,809 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/ps5-ll_unwindbound100.c[458,471] [2020-12-22 05:41:04,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:41:04,833 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:41:04,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04 WrapperNode [2020-12-22 05:41:04,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:41:04,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:41:04,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:41:04,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:41:04,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:41:04,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:41:04,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:41:04,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:41:04,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (1/1) ... [2020-12-22 05:41:04,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:41:04,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:41:04,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:41:04,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:41:04,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (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 05:41:05,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:41:05,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:41:05,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:41:05,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:41:05,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:41:05,426 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:41:05,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:41:05 BoogieIcfgContainer [2020-12-22 05:41:05,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:41:05,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:41:05,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:41:05,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:41:05,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:41:04" (1/3) ... [2020-12-22 05:41:05,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3c54a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:41:05, skipping insertion in model container [2020-12-22 05:41:05,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:41:04" (2/3) ... [2020-12-22 05:41:05,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3c54a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:41:05, skipping insertion in model container [2020-12-22 05:41:05,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:41:05" (3/3) ... [2020-12-22 05:41:05,466 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound100.c [2020-12-22 05:41:05,476 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:41:05,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:41:05,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:41:05,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:41:05,552 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:41:05,553 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:41:05,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:41:05,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:41:05,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:41:05,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:41:05,553 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:41:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 05:41:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:41:05,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:05,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:05,579 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-22 05:41:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:05,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707027564] [2020-12-22 05:41:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:41:05,860 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 05:41:05,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707027564] [2020-12-22 05:41:05,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:41:05,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:41:05,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642412647] [2020-12-22 05:41:05,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:41:05,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:41:05,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:41:05,902 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-22 05:41:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:05,922 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-22 05:41:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:41:05,924 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:41:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:05,954 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:41:05,954 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:41:05,958 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 05:41:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:41:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:41:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:41:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 05:41:06,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-22 05:41:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:06,010 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 05:41:06,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:41:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 05:41:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:41:06,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:06,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:06,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:41:06,014 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:41:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358496621] [2020-12-22 05:41:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:06,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:06,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290129374] [2020-12-22 05:41:06,062 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 05:41:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:41:06,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:41:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:06,336 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 05:41:06,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358496621] [2020-12-22 05:41:06,337 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:06,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290129374] [2020-12-22 05:41:06,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:41:06,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:41:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118957724] [2020-12-22 05:41:06,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:41:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:41:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:41:06,353 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-22 05:41:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:06,461 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-22 05:41:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:41:06,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 05:41:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:06,463 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:41:06,463 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 05:41:06,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:41:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 05:41:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 05:41:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:41:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:41:06,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-22 05:41:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:06,472 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:41:06,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:41:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:41:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:41:06,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:06,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:06,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:41:06,689 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:06,691 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-22 05:41:06,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:06,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869994196] [2020-12-22 05:41:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:06,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:06,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966908977] [2020-12-22 05:41:06,707 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 05:41:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:41:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:41:06,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:41:06,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869994196] [2020-12-22 05:41:06,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:06,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966908977] [2020-12-22 05:41:06,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:41:06,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:41:06,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219011655] [2020-12-22 05:41:06,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:41:06,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:41:06,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:41:06,866 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-22 05:41:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:06,998 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-22 05:41:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:41:06,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:41:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:07,000 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:41:07,000 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:41:07,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:41:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:41:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-22 05:41:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:41:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 05:41:07,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-22 05:41:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 05:41:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:41:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 05:41:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:41:07,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:07,011 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:07,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:07,215 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-22 05:41:07,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:07,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620624692] [2020-12-22 05:41:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:07,231 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:07,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124705863] [2020-12-22 05:41:07,232 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 05:41:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:41:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:41:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:07,335 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 05:41:07,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620624692] [2020-12-22 05:41:07,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124705863] [2020-12-22 05:41:07,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:41:07,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:41:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213473107] [2020-12-22 05:41:07,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:41:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:41:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:41:07,339 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-22 05:41:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:07,367 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 05:41:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:41:07,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:41:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:07,369 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:41:07,369 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:41:07,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:41:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:41:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:41:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:41:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 05:41:07,377 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-22 05:41:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:07,377 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 05:41:07,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:41:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 05:41:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:41:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:07,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:07,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:07,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-22 05:41:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:07,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317801381] [2020-12-22 05:41:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:07,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:07,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849005035] [2020-12-22 05:41:07,612 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 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 05:41:07,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:41:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:41:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:41:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:41:07,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317801381] [2020-12-22 05:41:07,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849005035] [2020-12-22 05:41:07,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:41:07,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:41:07,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298039039] [2020-12-22 05:41:07,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:41:07,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:41:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:41:07,941 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-22 05:41:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:08,125 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-22 05:41:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:41:08,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 05:41:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:08,128 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:41:08,128 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 05:41:08,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:41:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 05:41:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-22 05:41:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:41:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-22 05:41:08,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-22 05:41:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:08,138 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-22 05:41:08,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:41:08,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-22 05:41:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:41:08,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:08,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:08,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:08,345 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:08,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-22 05:41:08,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:08,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139812043] [2020-12-22 05:41:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:08,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:08,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203817473] [2020-12-22 05:41:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:41:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:41:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:08,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:41:08,509 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 05:41:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139812043] [2020-12-22 05:41:08,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:08,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203817473] [2020-12-22 05:41:08,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:41:08,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:41:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516287548] [2020-12-22 05:41:08,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:41:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:41:08,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:41:08,512 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-22 05:41:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:08,680 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-22 05:41:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:41:08,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:41:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:08,682 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:41:08,682 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:41:08,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:41:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:41:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:41:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:41:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 05:41:08,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-22 05:41:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:08,690 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 05:41:08,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:41:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 05:41:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:41:08,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:08,691 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:08,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:41:08,905 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-22 05:41:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:08,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576303235] [2020-12-22 05:41:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:08,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:08,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364443294] [2020-12-22 05:41:08,919 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:08,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:41:08,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:41:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:41:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:41:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:41:09,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576303235] [2020-12-22 05:41:09,042 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:41:09,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364443294] [2020-12-22 05:41:09,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:41:09,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:41:09,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283500911] [2020-12-22 05:41:09,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:41:09,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:41:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:41:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:41:09,045 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-22 05:41:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:41:09,098 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 05:41:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:41:09,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 05:41:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:41:09,102 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:41:09,102 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:41:09,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:41:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:41:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:41:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:41:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 05:41:09,119 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-22 05:41:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:41:09,120 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 05:41:09,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:41:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 05:41:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:41:09,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:41:09,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:41:09,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:09,324 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:41:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:41:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-22 05:41:09,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:41:09,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130627867] [2020-12-22 05:41:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:41:09,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:41:09,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022816697] [2020-12-22 05:41:09,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true