/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/prodbin-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:57:58,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:57:58,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:57:58,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:57:58,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:57:58,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:57:58,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:57:58,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:57:58,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:57:58,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:57:58,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:57:58,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:57:58,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:57:58,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:57:58,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:57:58,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:57:58,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:57:58,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:57:58,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:57:58,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:57:58,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:57:58,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:57:58,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:57:58,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:57:58,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:57:58,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:57:58,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:57:58,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:57:58,645 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 17:57:58,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:57:58,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:57:58,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:57:58,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:57:58,693 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:57:58,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:57:58,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:57:58,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:57:58,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:57:58,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:57:58,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:57:58,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:57:58,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:57:58,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:57:58,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:57:58,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:57:58,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:57:58,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:58,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:57:58,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:57:58,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:57:58,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:57:58,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:57:58,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:57:58,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:57:58,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:57:59,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:57:59,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:57:59,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:57:59,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:57:59,088 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:57:59,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2021-01-06 17:57:59,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c49ef2761/9cf4710a84334d499cbb146fc37f6b29/FLAGae4a22493 [2021-01-06 17:57:59,715 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:57:59,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2021-01-06 17:57:59,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c49ef2761/9cf4710a84334d499cbb146fc37f6b29/FLAGae4a22493 [2021-01-06 17:58:00,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c49ef2761/9cf4710a84334d499cbb146fc37f6b29 [2021-01-06 17:58:00,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:58:00,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:58:00,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:58:00,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:58:00,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:58:00,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb21864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00, skipping insertion in model container [2021-01-06 17:58:00,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:58:00,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:58:00,365 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/prodbin-ll_valuebound2.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:58:00,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:58:00,405 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:58:00,422 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/prodbin-ll_valuebound2.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:58:00,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:58:00,464 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:58:00,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00 WrapperNode [2021-01-06 17:58:00,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:58:00,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:58:00,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:58:00,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:58:00,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:58:00,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:58:00,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:58:00,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:58:00,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (1/1) ... [2021-01-06 17:58:00,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:58:00,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:58:00,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:58:00,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:58:00,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (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 17:58:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:58:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:58:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:58:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:58:01,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:58:01,075 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 17:58:01,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:01 BoogieIcfgContainer [2021-01-06 17:58:01,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:58:01,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:58:01,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:58:01,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:58:01,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:58:00" (1/3) ... [2021-01-06 17:58:01,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8890d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:58:01, skipping insertion in model container [2021-01-06 17:58:01,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:58:00" (2/3) ... [2021-01-06 17:58:01,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8890d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:58:01, skipping insertion in model container [2021-01-06 17:58:01,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:01" (3/3) ... [2021-01-06 17:58:01,098 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound2.c [2021-01-06 17:58:01,108 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:58:01,113 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:58:01,132 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:58:01,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:58:01,170 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:58:01,170 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:58:01,170 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:58:01,170 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:58:01,170 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:58:01,170 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:58:01,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:58:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 17:58:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:58:01,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:01,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:01,190 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-01-06 17:58:01,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:01,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125868196] [2021-01-06 17:58:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:01,460 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 17:58:01,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125868196] [2021-01-06 17:58:01,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:01,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:58:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004506508] [2021-01-06 17:58:01,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:58:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:58:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:58:01,490 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 17:58:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:01,510 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2021-01-06 17:58:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:58:01,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:58:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:01,526 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:58:01,526 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:58:01,530 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 17:58:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:58:01,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 17:58:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:58:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 17:58:01,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2021-01-06 17:58:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:01,564 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 17:58:01,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:58:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 17:58:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:58:01,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:01,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:01,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:58:01,566 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-01-06 17:58:01,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:01,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507781779] [2021-01-06 17:58:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:01,589 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:01,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374062235] [2021-01-06 17:58:01,590 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 17:58:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:58:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:01,800 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 17:58:01,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507781779] [2021-01-06 17:58:01,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:01,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374062235] [2021-01-06 17:58:01,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:01,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:58:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157336075] [2021-01-06 17:58:01,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:58:01,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:58:01,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:58:01,805 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2021-01-06 17:58:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:01,942 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-01-06 17:58:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:58:01,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 17:58:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:01,943 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:58:01,943 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:58:01,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:58:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:58:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-01-06 17:58:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:58:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 17:58:01,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2021-01-06 17:58:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:01,951 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 17:58:01,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:58:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 17:58:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:58:01,952 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:01,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:02,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:58:02,167 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash -937526112, now seen corresponding path program 1 times [2021-01-06 17:58:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:02,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501876331] [2021-01-06 17:58:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:02,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:02,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175466305] [2021-01-06 17:58:02,198 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 17:58:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:58:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:02,316 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 17:58:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501876331] [2021-01-06 17:58:02,316 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175466305] [2021-01-06 17:58:02,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:02,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:58:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502808702] [2021-01-06 17:58:02,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:58:02,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:58:02,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:58:02,320 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2021-01-06 17:58:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:02,431 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 17:58:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:58:02,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 17:58:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:02,433 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:58:02,433 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:58:02,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:58:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:58:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-01-06 17:58:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:58:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 17:58:02,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2021-01-06 17:58:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:02,440 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 17:58:02,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:58:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 17:58:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:58:02,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:02,442 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:02,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:02,659 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1030171456, now seen corresponding path program 1 times [2021-01-06 17:58:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:02,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539785323] [2021-01-06 17:58:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:02,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:02,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66356347] [2021-01-06 17:58:02,680 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 17:58:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:02,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:58:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:03,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:58:03,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:03,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:58:03,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:58:03,375 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 17:58:03,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539785323] [2021-01-06 17:58:03,376 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:03,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66356347] [2021-01-06 17:58:03,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:58:03,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:58:03,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109887238] [2021-01-06 17:58:03,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:58:03,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:58:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:58:03,379 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2021-01-06 17:58:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:03,901 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:58:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:58:03,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 17:58:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:03,903 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:58:03,904 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:58:03,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:58:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:58:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-01-06 17:58:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:58:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 17:58:03,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2021-01-06 17:58:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:03,917 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 17:58:03,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:58:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 17:58:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:58:03,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:03,919 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:04,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:04,135 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1032018498, now seen corresponding path program 1 times [2021-01-06 17:58:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:04,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24301897] [2021-01-06 17:58:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:04,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813784223] [2021-01-06 17:58:04,161 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 17:58:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:58:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:04,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:04,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:04,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:04,496 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:58:04,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:04,571 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 17:58:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24301897] [2021-01-06 17:58:04,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:04,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813784223] [2021-01-06 17:58:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:58:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:58:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565424421] [2021-01-06 17:58:04,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:58:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:58:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:58:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:58:04,574 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2021-01-06 17:58:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:58:05,179 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-01-06 17:58:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:58:05,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 17:58:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:58:05,180 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:58:05,180 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:58:05,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:58:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:58:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-01-06 17:58:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:58:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:58:05,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-01-06 17:58:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:58:05,187 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:58:05,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:58:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:58:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:58:05,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:58:05,188 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:58:05,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:05,403 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:58:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:58:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash -577897161, now seen corresponding path program 1 times [2021-01-06 17:58:05,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:58:05,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107742166] [2021-01-06 17:58:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:58:05,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:58:05,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747593775] [2021-01-06 17:58:05,421 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 17:58:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:58:05,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:58:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:05,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:05,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:06,002 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:58:06,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:58:06,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107742166] [2021-01-06 17:58:06,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:06,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747593775] [2021-01-06 17:58:06,017 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:58:06,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:06,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:58:06,017 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:58:06,017 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:58:06,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:58:06,253 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:58:06,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:58:06 BoogieIcfgContainer [2021-01-06 17:58:06,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:58:06,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:58:06,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:58:06,255 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:58:06,255 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:58:01" (3/4) ... [2021-01-06 17:58:06,259 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:58:06,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:58:06,267 INFO L168 Benchmark]: Toolchain (without parser) took 6153.92 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 142.5 MB in the beginning and 143.1 MB in the end (delta: -651.3 kB). Peak memory consumption was 33.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,267 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 136.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:06,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.23 ms. Allocated memory is still 166.7 MB. Free memory was 142.3 MB in the beginning and 132.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.07 ms. Allocated memory is still 166.7 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,270 INFO L168 Benchmark]: Boogie Preprocessor took 50.01 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 129.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,274 INFO L168 Benchmark]: RCFGBuilder took 503.82 ms. Allocated memory is still 166.7 MB. Free memory was 129.7 MB in the beginning and 116.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,276 INFO L168 Benchmark]: TraceAbstraction took 5175.50 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 115.8 MB in the beginning and 143.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:06,281 INFO L168 Benchmark]: Witness Printer took 4.83 ms. Allocated memory is still 200.3 MB. Free memory was 143.4 MB in the beginning and 143.1 MB in the end (delta: 282.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:06,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 136.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 352.23 ms. Allocated memory is still 166.7 MB. Free memory was 142.3 MB in the beginning and 132.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.07 ms. Allocated memory is still 166.7 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.01 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 129.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.82 ms. Allocated memory is still 166.7 MB. Free memory was 129.7 MB in the beginning and 116.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5175.50 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 115.8 MB in the beginning and 143.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.83 ms. Allocated memory is still 200.3 MB. Free memory was 143.4 MB in the beginning and 143.1 MB in the end (delta: 282.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L21] int a, b; [L22] long long x, y, z; [L24] a = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) [L10] COND FALSE !(!cond) [L30] x = a [L31] y = b [L32] z = 0 [L34] COND TRUE 1 [L13] COND FALSE !(!(cond)) [L36] COND FALSE !(!(y != 0)) [L39] COND FALSE !(y % 2 == 1) [L43] x = 2 * x [L44] y = y / 2 [L34] COND TRUE 1 [L13] COND FALSE !(!(cond)) [L36] COND FALSE !(!(y != 0)) [L39] COND TRUE y % 2 == 1 [L40] z = z + x [L41] y = y - 1 [L43] x = 2 * x [L44] y = y / 2 [L34] COND TRUE 1 [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 276 SDslu, 86 SDs, 0 SdLazy, 202 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 9270 SizeOfPredicates, 38 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 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...