/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/divbin2_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:27:07,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:27:07,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:27:07,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 17:27:07,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:27:07,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:27:07,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:27:07,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:27:07,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:27:07,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:27:07,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:27:07,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:27:07,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:27:07,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:27:07,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:27:07,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:27:07,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:27:07,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:27:07,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:27:07,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:27:07,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:27:08,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:27:08,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:27:08,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:27:08,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:27:08,044 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:27:08,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:27:08,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:27:08,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:27:08,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:27:08,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:27:08,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:27:08,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:27:08,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:27:08,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:27:08,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:27:08,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:27:08,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:27:08,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:27:08,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:27:08,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:27:08,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:27:08,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:27:08,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:27:08,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:27:08,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:27:08,051 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:27:08,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:27:08,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:27:08,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:27:08,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:27:08,511 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:27:08,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2021-01-06 17:27:08,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/189f10105/154912962e8844b3b0a6208a8c6f4e88/FLAGeac689fe2 [2021-01-06 17:27:09,249 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:27:09,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2021-01-06 17:27:09,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/189f10105/154912962e8844b3b0a6208a8c6f4e88/FLAGeac689fe2 [2021-01-06 17:27:09,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/189f10105/154912962e8844b3b0a6208a8c6f4e88 [2021-01-06 17:27:09,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:27:09,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:27:09,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:27:09,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:27:09,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:27:09,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:27:09" (1/1) ... [2021-01-06 17:27:09,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68712568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:09, skipping insertion in model container [2021-01-06 17:27:09,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:27:09" (1/1) ... [2021-01-06 17:27:09,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:27:09,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:27:09,918 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:27:09,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:27:09,961 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:27:09,985 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:27:10,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:27:10,033 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:27:10,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10 WrapperNode [2021-01-06 17:27:10,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:27:10,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:27:10,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:27:10,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:27:10,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:27:10,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:27:10,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:27:10,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:27:10,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... [2021-01-06 17:27:10,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:27:10,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:27:10,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:27:10,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:27:10,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:27:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:27:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:27:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:27:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:27:10,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:27:10,496 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:27:10,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:10 BoogieIcfgContainer [2021-01-06 17:27:10,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:27:10,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:27:10,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:27:10,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:27:10,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:27:09" (1/3) ... [2021-01-06 17:27:10,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6910dbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:27:10, skipping insertion in model container [2021-01-06 17:27:10,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:10" (2/3) ... [2021-01-06 17:27:10,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6910dbfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:27:10, skipping insertion in model container [2021-01-06 17:27:10,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:10" (3/3) ... [2021-01-06 17:27:10,508 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2021-01-06 17:27:10,515 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:27:10,520 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:27:10,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:27:10,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:27:10,650 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:27:10,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:27:10,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:27:10,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:27:10,651 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:27:10,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:27:10,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:27:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:27:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:27:10,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:10,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:10,682 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:10,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-01-06 17:27:10,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:10,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253676871] [2021-01-06 17:27:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:10,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253676871] [2021-01-06 17:27:10,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:10,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:27:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244218385] [2021-01-06 17:27:10,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:27:10,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:27:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:27:10,898 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:27:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:10,922 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-01-06 17:27:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:27:10,924 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:27:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:10,935 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:27:10,936 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:27:10,939 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 [2021-01-06 17:27:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:27:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:27:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:27:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 17:27:10,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-01-06 17:27:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:10,982 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 17:27:10,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:27:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 17:27:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:27:10,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:10,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:10,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:27:10,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-01-06 17:27:10,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:10,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029888206] [2021-01-06 17:27:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:11,003 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:11,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32606867] [2021-01-06 17:27:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:27:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029888206] [2021-01-06 17:27:11,224 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32606867] [2021-01-06 17:27:11,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:11,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:27:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137221527] [2021-01-06 17:27:11,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:27:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:27:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:27:11,232 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2021-01-06 17:27:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:11,279 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 17:27:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:27:11,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 17:27:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:11,282 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:27:11,283 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:27:11,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:27:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:27:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 17:27:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:27:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 17:27:11,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-01-06 17:27:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:11,297 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 17:27:11,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:27:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 17:27:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:27:11,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:11,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:11,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:27:11,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-01-06 17:27:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:11,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646443548] [2021-01-06 17:27:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:11,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:11,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096054376] [2021-01-06 17:27:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:27:11,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:11,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646443548] [2021-01-06 17:27:11,705 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:11,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096054376] [2021-01-06 17:27:11,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:11,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:27:11,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878904134] [2021-01-06 17:27:11,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:27:11,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:27:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:27:11,708 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 17:27:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:11,806 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-01-06 17:27:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:11,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 17:27:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:11,808 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:27:11,809 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:27:11,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:27:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 17:27:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:27:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 17:27:11,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-01-06 17:27:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:11,816 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 17:27:11,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:27:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 17:27:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:27:11,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:11,817 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:12,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:12,032 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-01-06 17:27:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:12,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628151807] [2021-01-06 17:27:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:12,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:12,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030670401] [2021-01-06 17:27:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:27:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:12,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628151807] [2021-01-06 17:27:12,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:12,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030670401] [2021-01-06 17:27:12,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:12,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:27:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182680682] [2021-01-06 17:27:12,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:27:12,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:12,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:27:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:27:12,140 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-06 17:27:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:12,191 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-01-06 17:27:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:12,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 17:27:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:12,193 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:27:12,193 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:27:12,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:27:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:27:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:27:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:27:12,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2021-01-06 17:27:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:12,206 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:27:12,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:27:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:27:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:27:12,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:12,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:12,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:12,426 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-01-06 17:27:12,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:12,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037862995] [2021-01-06 17:27:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:12,444 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:12,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963530069] [2021-01-06 17:27:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:27:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:12,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037862995] [2021-01-06 17:27:12,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:12,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963530069] [2021-01-06 17:27:12,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:12,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:27:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025416877] [2021-01-06 17:27:12,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:27:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:27:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:27:12,647 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-06 17:27:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:12,794 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-01-06 17:27:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:27:12,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:27:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:12,796 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:27:12,797 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:27:12,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:27:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 17:27:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:27:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:27:12,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2021-01-06 17:27:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:12,804 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:27:12,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:27:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:27:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:27:12,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:12,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:13,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:13,022 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2021-01-06 17:27:13,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:13,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172149278] [2021-01-06 17:27:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:13,041 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053227687] [2021-01-06 17:27:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:13,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:27:13,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:13,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172149278] [2021-01-06 17:27:13,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:13,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053227687] [2021-01-06 17:27:13,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:13,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:27:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218875344] [2021-01-06 17:27:13,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:27:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:27:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:27:13,153 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2021-01-06 17:27:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:13,189 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 17:27:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:27:13,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 17:27:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:13,190 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:27:13,190 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:27:13,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:27:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:27:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 17:27:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:27:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 17:27:13,196 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-01-06 17:27:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:13,197 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 17:27:13,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:27:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 17:27:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:27:13,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:13,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:13,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:27:13,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2021-01-06 17:27:13,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:13,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714526817] [2021-01-06 17:27:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:13,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:13,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140340325] [2021-01-06 17:27:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:27:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:27:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:13,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714526817] [2021-01-06 17:27:13,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140340325] [2021-01-06 17:27:13,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:13,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:27:13,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423221245] [2021-01-06 17:27:13,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:27:13,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:27:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:27:13,731 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2021-01-06 17:27:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:13,917 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-01-06 17:27:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:27:13,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 17:27:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:13,919 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:27:13,919 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:27:13,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:27:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:27:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-01-06 17:27:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:27:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 17:27:13,925 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2021-01-06 17:27:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:13,926 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 17:27:13,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:27:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 17:27:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:27:13,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:13,929 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:14,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:14,141 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2021-01-06 17:27:14,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:14,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211925394] [2021-01-06 17:27:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:14,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:14,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317947419] [2021-01-06 17:27:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:27:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:14,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:27:14,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:27:14,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211925394] [2021-01-06 17:27:14,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:14,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317947419] [2021-01-06 17:27:14,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:14,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:27:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271691725] [2021-01-06 17:27:14,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:27:14,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:14,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:27:14,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:14,263 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-01-06 17:27:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:14,301 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 17:27:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:27:14,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 17:27:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:14,302 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:27:14,302 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:27:14,303 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 [2021-01-06 17:27:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:27:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:27:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:27:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 17:27:14,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2021-01-06 17:27:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:14,308 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 17:27:14,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:27:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 17:27:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:27:14,309 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:14,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:14,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:14,517 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2021-01-06 17:27:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:14,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612795059] [2021-01-06 17:27:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:14,538 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:14,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536364195] [2021-01-06 17:27:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:14,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:27:14,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:27:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:15,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612795059] [2021-01-06 17:27:15,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536364195] [2021-01-06 17:27:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:15,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:27:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99866050] [2021-01-06 17:27:15,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:27:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:15,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:27:15,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:27:15,023 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2021-01-06 17:27:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:15,294 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-01-06 17:27:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:27:15,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 17:27:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:15,296 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:27:15,296 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:27:15,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:27:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:27:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-01-06 17:27:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:27:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:27:15,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2021-01-06 17:27:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:15,303 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:27:15,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:27:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:27:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:27:15,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:15,304 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:15,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:27:15,518 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2021-01-06 17:27:15,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:15,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111969436] [2021-01-06 17:27:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:15,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:15,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814652988] [2021-01-06 17:27:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:15,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:27:15,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:27:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:27:15,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111969436] [2021-01-06 17:27:15,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:15,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814652988] [2021-01-06 17:27:15,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:15,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:27:15,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140668143] [2021-01-06 17:27:15,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:27:15,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:15,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:27:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:15,664 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2021-01-06 17:27:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:15,721 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-01-06 17:27:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:27:15,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:27:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:15,722 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:27:15,722 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:27:15,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:27:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:27:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 17:27:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:27:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 17:27:15,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2021-01-06 17:27:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:15,730 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 17:27:15,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:27:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 17:27:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:27:15,731 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:15,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:15,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:15,945 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2021-01-06 17:27:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:15,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594025161] [2021-01-06 17:27:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:15,959 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:15,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29361392] [2021-01-06 17:27:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:16,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:27:16,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:16,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594025161] [2021-01-06 17:27:16,181 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:16,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29361392] [2021-01-06 17:27:16,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:16,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:27:16,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998734512] [2021-01-06 17:27:16,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:27:16,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:27:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:16,184 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2021-01-06 17:27:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:16,260 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-01-06 17:27:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:16,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-01-06 17:27:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:16,262 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:27:16,262 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:27:16,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:27:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:27:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:27:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-01-06 17:27:16,268 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2021-01-06 17:27:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:16,269 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-01-06 17:27:16,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:27:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-01-06 17:27:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:27:16,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:16,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:16,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:16,484 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2021-01-06 17:27:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880509115] [2021-01-06 17:27:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:16,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:16,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823638200] [2021-01-06 17:27:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:16,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:27:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:27:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:17,081 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2021-01-06 17:27:17,380 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:17,727 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:18,731 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:19,789 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:21,285 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:23,026 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:27:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880509115] [2021-01-06 17:27:23,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:23,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823638200] [2021-01-06 17:27:23,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:27:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67867932] [2021-01-06 17:27:23,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:27:23,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:27:23,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:27:23,735 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2021-01-06 17:27:24,096 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-01-06 17:27:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:24,325 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:27:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:27:24,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 17:27:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:24,327 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:27:24,327 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:27:24,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:27:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-01-06 17:27:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:27:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-01-06 17:27:24,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2021-01-06 17:27:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:24,334 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-01-06 17:27:24,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:27:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-01-06 17:27:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:27:24,335 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:24,336 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:24,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:27:24,537 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2021-01-06 17:27:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:24,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11268845] [2021-01-06 17:27:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:24,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:24,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527789123] [2021-01-06 17:27:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:27:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:27:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:27:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11268845] [2021-01-06 17:27:24,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527789123] [2021-01-06 17:27:24,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:24,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:27:24,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20714265] [2021-01-06 17:27:24,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:27:24,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:24,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:27:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:24,703 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2021-01-06 17:27:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:24,746 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-01-06 17:27:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:24,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-01-06 17:27:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:24,748 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:27:24,748 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:27:24,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:27:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-01-06 17:27:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:27:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-01-06 17:27:24,767 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2021-01-06 17:27:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:24,768 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-01-06 17:27:24,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:27:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-01-06 17:27:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:27:24,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:24,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:24,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:27:24,977 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2021-01-06 17:27:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:24,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148978473] [2021-01-06 17:27:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:24,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:24,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996550922] [2021-01-06 17:27:24,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:25,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:27:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:27:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:25,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:27:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:25,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148978473] [2021-01-06 17:27:25,423 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:25,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996550922] [2021-01-06 17:27:25,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:25,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:27:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611917802] [2021-01-06 17:27:25,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:27:25,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:27:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:25,428 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2021-01-06 17:27:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:25,712 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-01-06 17:27:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:27:25,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:27:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:25,714 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:27:25,714 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:27:25,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:27:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:27:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-01-06 17:27:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:27:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:27:25,727 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:27:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:25,728 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:27:25,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:27:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:27:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:27:25,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:25,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:27:25,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:27:25,930 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1793535410, now seen corresponding path program 4 times [2021-01-06 17:27:25,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858346596] [2021-01-06 17:27:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:25,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234743727] [2021-01-06 17:27:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:26,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:27:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:27:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:26,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858346596] [2021-01-06 17:27:26,619 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:26,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234743727] [2021-01-06 17:27:26,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:26,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:27:26,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425392749] [2021-01-06 17:27:26,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:27:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:27:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:26,621 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2021-01-06 17:27:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:27,001 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-01-06 17:27:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:27:27,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:27:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:27,002 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:27:27,002 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:27:27,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:27:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:27:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-01-06 17:27:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:27:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:27:27,008 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:27:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:27,009 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:27:27,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:27:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:27:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:27:27,009 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:27,009 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:27,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:27,214 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1780420744, now seen corresponding path program 1 times [2021-01-06 17:27:27,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:27,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083983945] [2021-01-06 17:27:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:27,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:27,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620261743] [2021-01-06 17:27:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:27,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:27:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:27:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083983945] [2021-01-06 17:27:27,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620261743] [2021-01-06 17:27:27,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:27,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:27:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084291873] [2021-01-06 17:27:27,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:27:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:27:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:27:27,376 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2021-01-06 17:27:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:27,454 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 17:27:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:27:27,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 17:27:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:27,455 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:27:27,455 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:27:27,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:27:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 17:27:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:27:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-01-06 17:27:27,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2021-01-06 17:27:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:27,461 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-01-06 17:27:27,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:27:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-01-06 17:27:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:27:27,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:27,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:27,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:27:27,676 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash 848950570, now seen corresponding path program 3 times [2021-01-06 17:27:27,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:27,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844361752] [2021-01-06 17:27:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:27,688 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:27,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241228335] [2021-01-06 17:27:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:39,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:27:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:27:39,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:39,435 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:39,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844361752] [2021-01-06 17:27:39,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:39,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241228335] [2021-01-06 17:27:39,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:27:39,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:39,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:27:39,439 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:27:39,439 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:27:39,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:27:39,672 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:27:39,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:27:39 BoogieIcfgContainer [2021-01-06 17:27:39,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:27:39,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:27:39,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:27:39,673 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:27:39,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:10" (3/4) ... [2021-01-06 17:27:39,678 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:27:39,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:27:39,679 INFO L168 Benchmark]: Toolchain (without parser) took 30073.99 ms. Allocated memory was 152.0 MB in the beginning and 442.5 MB in the end (delta: 290.5 MB). Free memory was 126.5 MB in the beginning and 394.7 MB in the end (delta: -268.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:39,680 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:27:39,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.16 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:39,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.30 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:39,688 INFO L168 Benchmark]: Boogie Preprocessor took 53.79 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 113.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:39,689 INFO L168 Benchmark]: RCFGBuilder took 348.58 ms. Allocated memory is still 152.0 MB. Free memory was 113.6 MB in the beginning and 100.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:39,690 INFO L168 Benchmark]: TraceAbstraction took 29172.27 ms. Allocated memory was 152.0 MB in the beginning and 442.5 MB in the end (delta: 290.5 MB). Free memory was 100.1 MB in the beginning and 394.9 MB in the end (delta: -294.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:27:39,690 INFO L168 Benchmark]: Witness Printer took 5.03 ms. Allocated memory is still 442.5 MB. Free memory was 394.9 MB in the beginning and 394.7 MB in the end (delta: 201.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:27:39,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 423.16 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 116.3 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 57.30 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.79 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 113.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 348.58 ms. Allocated memory is still 152.0 MB. Free memory was 113.6 MB in the beginning and 100.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29172.27 ms. Allocated memory was 152.0 MB in the beginning and 442.5 MB in the end (delta: 290.5 MB). Free memory was 100.1 MB in the beginning and 394.9 MB in the end (delta: -294.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.03 ms. Allocated memory is still 442.5 MB. Free memory was 394.9 MB in the beginning and 394.7 MB in the end (delta: 201.7 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: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<50 [L35] COND TRUE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<50 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 29.0s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 180 SDslu, 909 SDs, 0 SdLazy, 868 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 72 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 285 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 269 ConstructedInterpolants, 0 QuantifiedInterpolants, 53254 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 64/186 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...