/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:20:30,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:20:30,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:20:30,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:20:30,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:20:30,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:20:30,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:20:30,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:20:30,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:20:30,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:20:30,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:20:30,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:20:30,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:20:30,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:20:30,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:20:30,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:20:30,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:20:30,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:20:30,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:20:30,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:20:30,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:20:30,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:20:30,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:20:30,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:20:30,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:20:30,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:20:30,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:20:30,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:20:30,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:20:30,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:20:30,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:20:30,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:20:30,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:20:30,825 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:20:30,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:20:30,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:20:30,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:20:30,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:20:30,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:20:30,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:20:30,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:20:30,828 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:20:30,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:20:30,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:20:30,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:20:30,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:20:30,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:20:30,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:20:30,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:20:30,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:20:30,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:20:30,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:20:30,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:20:30,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:20:30,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:20:31,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:20:31,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:20:31,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:20:31,382 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:20:31,383 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:20:31,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prod4br-ll.c [2020-12-23 07:20:31,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a28db3cbb/b690b53a4682465baaac38271967cc2d/FLAG3f78cdb7e [2020-12-23 07:20:32,158 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:20:32,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/prod4br-ll.c [2020-12-23 07:20:32,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a28db3cbb/b690b53a4682465baaac38271967cc2d/FLAG3f78cdb7e [2020-12-23 07:20:32,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a28db3cbb/b690b53a4682465baaac38271967cc2d [2020-12-23 07:20:32,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:20:32,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:20:32,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:20:32,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:20:32,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:20:32,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f62bf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32, skipping insertion in model container [2020-12-23 07:20:32,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:20:32,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:20:32,697 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/prod4br-ll.c[524,537] 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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 07:20:32,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:20:32,729 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:20:32,742 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/prod4br-ll.c[524,537] 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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 07:20:32,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:20:32,772 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:20:32,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32 WrapperNode [2020-12-23 07:20:32,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:20:32,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:20:32,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:20:32,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:20:32,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:20:32,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:20:32,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:20:32,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:20:32,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (1/1) ... [2020-12-23 07:20:32,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:20:32,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:20:32,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:20:32,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:20:32,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (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 [2020-12-23 07:20:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:20:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:20:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:20:33,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:20:33,289 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 07:20:33,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:33 BoogieIcfgContainer [2020-12-23 07:20:33,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:20:33,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:20:33,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:20:33,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:20:33,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:20:32" (1/3) ... [2020-12-23 07:20:33,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88ba8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:20:33, skipping insertion in model container [2020-12-23 07:20:33,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:20:32" (2/3) ... [2020-12-23 07:20:33,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88ba8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:20:33, skipping insertion in model container [2020-12-23 07:20:33,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:33" (3/3) ... [2020-12-23 07:20:33,318 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2020-12-23 07:20:33,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:20:33,374 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 07:20:33,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 07:20:33,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:20:33,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:20:33,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:20:33,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:20:33,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:20:33,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:20:33,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:20:33,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:20:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 07:20:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:20:33,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:33,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:33,491 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-23 07:20:33,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:33,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648340727] [2020-12-23 07:20:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:33,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648340727] [2020-12-23 07:20:33,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:33,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:20:33,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089158786] [2020-12-23 07:20:33,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:20:33,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:33,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:20:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:20:33,705 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 07:20:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:33,722 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-12-23 07:20:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:20:33,724 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:20:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:33,734 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:20:33,734 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:20:33,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:20:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:20:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 07:20:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:20:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 07:20:33,775 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2020-12-23 07:20:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:33,776 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 07:20:33,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:20:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 07:20:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:20:33,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:33,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:33,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:20:33,778 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-23 07:20:33,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:33,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171292201] [2020-12-23 07:20:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:33,798 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:33,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483287085] [2020-12-23 07:20:33,799 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 [2020-12-23 07:20:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:20:33,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:34,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171292201] [2020-12-23 07:20:34,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:34,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483287085] [2020-12-23 07:20:34,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:34,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:20:34,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480744819] [2020-12-23 07:20:34,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:20:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:20:34,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:20:34,052 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-12-23 07:20:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:34,372 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-23 07:20:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:20:34,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-23 07:20:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:34,374 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:20:34,374 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:20:34,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:20:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:20:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2020-12-23 07:20:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:20:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 07:20:34,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2020-12-23 07:20:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:34,384 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 07:20:34,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:20:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 07:20:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:20:34,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:34,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:34,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:20:34,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1864211483, now seen corresponding path program 1 times [2020-12-23 07:20:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:34,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596853459] [2020-12-23 07:20:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:34,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:34,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4314299] [2020-12-23 07:20:34,618 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 [2020-12-23 07:20:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:20:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:34,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:34,948 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-23 07:20:35,068 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:35,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:35,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:20:35,083 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:35,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:35,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:20:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:35,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596853459] [2020-12-23 07:20:35,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:35,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4314299] [2020-12-23 07:20:35,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:20:35,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 07:20:35,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413123275] [2020-12-23 07:20:35,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:20:35,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:20:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:20:35,136 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2020-12-23 07:20:37,949 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-23 07:20:38,133 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-23 07:20:38,294 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-12-23 07:20:40,782 WARN L197 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-23 07:20:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:40,929 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-23 07:20:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:20:40,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-23 07:20:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:40,931 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:20:40,931 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:20:40,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:20:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:20:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-23 07:20:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:20:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-23 07:20:40,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2020-12-23 07:20:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:40,940 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-23 07:20:40,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:20:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-23 07:20:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:20:40,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:40,941 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:41,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:41,157 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1954678172, now seen corresponding path program 1 times [2020-12-23 07:20:41,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:41,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014711486] [2020-12-23 07:20:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:41,173 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489806457] [2020-12-23 07:20:41,174 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 [2020-12-23 07:20:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:20:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:41,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:41,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:20:41,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:20:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:43,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014711486] [2020-12-23 07:20:43,474 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:43,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489806457] [2020-12-23 07:20:43,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:43,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:20:43,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418646968] [2020-12-23 07:20:43,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:20:43,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:20:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:20:43,477 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 7 states. [2020-12-23 07:20:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:45,880 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-23 07:20:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:20:45,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 07:20:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:45,883 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:20:45,883 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:20:45,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:20:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:20:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-12-23 07:20:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:20:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 07:20:45,892 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2020-12-23 07:20:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:45,893 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 07:20:45,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:20:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 07:20:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:20:45,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:45,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:46,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:46,109 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash -462951875, now seen corresponding path program 1 times [2020-12-23 07:20:46,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:46,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514833451] [2020-12-23 07:20:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:46,126 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:46,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446615481] [2020-12-23 07:20:46,126 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 [2020-12-23 07:20:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:20:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:48,432 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-23 07:20:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514833451] [2020-12-23 07:20:48,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446615481] [2020-12-23 07:20:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:48,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:20:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730729619] [2020-12-23 07:20:48,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:20:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:20:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:20:48,497 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 8 states. [2020-12-23 07:20:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:53,106 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-12-23 07:20:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:20:53,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 07:20:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:53,113 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:20:53,114 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:20:53,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:20:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:20:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-12-23 07:20:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:20:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-23 07:20:53,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2020-12-23 07:20:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:53,129 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-23 07:20:53,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:20:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-23 07:20:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:20:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:53,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:53,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:20:53,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1463868387, now seen corresponding path program 1 times [2020-12-23 07:20:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257503665] [2020-12-23 07:20:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:53,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:53,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627825560] [2020-12-23 07:20:53,355 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 [2020-12-23 07:20:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:20:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:20:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:20:53,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257503665] [2020-12-23 07:20:53,661 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:20:53,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627825560] [2020-12-23 07:20:53,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:20:53,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:20:53,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522458207] [2020-12-23 07:20:53,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:20:53,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:20:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:20:53,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:20:53,664 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 8 states. [2020-12-23 07:20:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:20:58,288 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-12-23 07:20:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:20:58,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 07:20:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:20:58,290 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:20:58,290 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:20:58,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:20:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:20:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2020-12-23 07:20:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:20:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-23 07:20:58,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2020-12-23 07:20:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:20:58,299 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-23 07:20:58,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:20:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-23 07:20:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:20:58,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:20:58,300 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:20:58,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:20:58,514 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:20:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:20:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1463927969, now seen corresponding path program 1 times [2020-12-23 07:20:58,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:20:58,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129592514] [2020-12-23 07:20:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:20:58,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:20:58,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689119900] [2020-12-23 07:20:58,529 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 [2020-12-23 07:20:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:20:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:20:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:01,130 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-23 07:21:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:01,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129592514] [2020-12-23 07:21:01,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:01,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689119900] [2020-12-23 07:21:01,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:01,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:21:01,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295434644] [2020-12-23 07:21:01,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:21:01,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:01,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:21:01,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:21:01,263 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2020-12-23 07:21:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:08,053 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 07:21:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:21:08,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 07:21:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:08,055 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:21:08,055 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 07:21:08,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:21:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 07:21:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2020-12-23 07:21:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:21:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-23 07:21:08,066 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 13 [2020-12-23 07:21:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:08,066 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-23 07:21:08,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:21:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-23 07:21:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:21:08,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:08,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:08,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:08,272 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash -645914224, now seen corresponding path program 1 times [2020-12-23 07:21:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:08,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885089422] [2020-12-23 07:21:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:08,284 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:08,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405823788] [2020-12-23 07:21:08,285 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 [2020-12-23 07:21:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:21:08,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:21:08,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885089422] [2020-12-23 07:21:08,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:08,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405823788] [2020-12-23 07:21:08,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:08,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:21:08,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136970678] [2020-12-23 07:21:08,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:21:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:21:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:08,438 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 6 states. [2020-12-23 07:21:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:08,635 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-12-23 07:21:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:21:08,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 07:21:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:08,637 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:21:08,637 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:21:08,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:21:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:21:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-12-23 07:21:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:21:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2020-12-23 07:21:08,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 14 [2020-12-23 07:21:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:08,648 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2020-12-23 07:21:08,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:21:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2020-12-23 07:21:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:21:08,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:08,650 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:08,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:08,864 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1452798489, now seen corresponding path program 2 times [2020-12-23 07:21:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37610433] [2020-12-23 07:21:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:08,879 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:08,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738648209] [2020-12-23 07:21:08,879 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 [2020-12-23 07:21:08,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:21:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:08,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:21:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:11,121 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~p~0 4) (<= 1 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~a~0 (div c_ULTIMATE.start_main_~x~0 2)) (= (mod c_ULTIMATE.start_main_~x~0 2) 0) (= c_ULTIMATE.start_main_~b~0 (div c_ULTIMATE.start_main_~y~0 2)) (= c_ULTIMATE.start_main_~q~0 0) (<= (mod c_ULTIMATE.start_main_~y~0 2) 0) (let ((.cse0 (= (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~p~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~q~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)) (and .cse0 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond))))) is different from false [2020-12-23 07:21:21,298 WARN L197 SmtUtils]: Spent 8.15 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 07:21:33,506 WARN L197 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-23 07:21:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37610433] [2020-12-23 07:21:33,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:33,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738648209] [2020-12-23 07:21:33,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:21:33,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:21:33,545 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:21:33,546 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:21:33,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:21:33,780 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:21:33,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:21:33 BoogieIcfgContainer [2020-12-23 07:21:33,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:21:33,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:21:33,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:21:33,782 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:21:33,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:20:33" (3/4) ... [2020-12-23 07:21:33,790 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:21:33,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:21:33,791 INFO L168 Benchmark]: Toolchain (without parser) took 61283.89 ms. Allocated memory was 161.5 MB in the beginning and 202.4 MB in the end (delta: 40.9 MB). Free memory was 136.2 MB in the beginning and 162.4 MB in the end (delta: -26.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:33,792 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:33,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.66 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:33,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.17 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:33,800 INFO L168 Benchmark]: Boogie Preprocessor took 26.02 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 123.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:33,801 INFO L168 Benchmark]: RCFGBuilder took 452.17 ms. Allocated memory is still 161.5 MB. Free memory was 123.2 MB in the beginning and 108.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:21:33,802 INFO L168 Benchmark]: TraceAbstraction took 60481.37 ms. Allocated memory was 161.5 MB in the beginning and 202.4 MB in the end (delta: 40.9 MB). Free memory was 108.1 MB in the beginning and 162.4 MB in the end (delta: -54.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:33,802 INFO L168 Benchmark]: Witness Printer took 8.00 ms. Allocated memory is still 202.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:21:33,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.66 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.1 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 41.17 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.02 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 123.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 452.17 ms. Allocated memory is still 161.5 MB. Free memory was 123.2 MB in the beginning and 108.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 60481.37 ms. Allocated memory was 161.5 MB in the beginning and 202.4 MB in the end (delta: 40.9 MB). Free memory was 108.1 MB in the beginning and 162.4 MB in the end (delta: -54.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 8.00 ms. Allocated memory is still 202.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 60.3s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 24.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 118 SDtfs, 458 SDslu, 257 SDs, 0 SdLazy, 475 SolverSat, 130 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=8, 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, 8 MinimizatonAttempts, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 79 ConstructedInterpolants, 1 QuantifiedInterpolants, 8817 SizeOfPredicates, 65 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 3/11 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...