/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/sqrt1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:15:06,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:15:06,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:15:06,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:15:06,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:15:06,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:15:06,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:15:06,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:15:06,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:15:06,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:15:06,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:15:06,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:15:06,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:15:06,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:15:06,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:15:06,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:15:06,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:15:06,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:15:06,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:15:06,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:15:06,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:15:06,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:15:06,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:15:06,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:15:06,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:15:06,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:15:06,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:15:06,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:15:06,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:15:06,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:15:06,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:15:06,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:15:06,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:15:06,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:15:06,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:15:06,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:15:06,852 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 08:15:06,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:15:06,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:15:06,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:15:06,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:15:06,907 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:15:06,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:15:06,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:15:06,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:15:06,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:15:06,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:15:06,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:15:06,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:15:06,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:15:06,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:15:06,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:15:06,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:15:06,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:15:06,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:15:06,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:15:06,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:15:06,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:15:07,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:15:07,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:15:07,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:15:07,345 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:15:07,346 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:15:07,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2020-12-23 08:15:07,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1ad30779/3dd06b72c5f94a9794045a416cf8fa8c/FLAGa8ec981ee [2020-12-23 08:15:08,121 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:15:08,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound50.c [2020-12-23 08:15:08,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1ad30779/3dd06b72c5f94a9794045a416cf8fa8c/FLAGa8ec981ee [2020-12-23 08:15:08,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1ad30779/3dd06b72c5f94a9794045a416cf8fa8c [2020-12-23 08:15:08,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:15:08,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:15:08,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:15:08,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:15:08,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:15:08,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509b2d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08, skipping insertion in model container [2020-12-23 08:15:08,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:15:08,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:15:08,711 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/sqrt1-ll_unwindbound50.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 08:15:08,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:15:08,758 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:15:08,777 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/sqrt1-ll_unwindbound50.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 08:15:08,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:15:08,830 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:15:08,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08 WrapperNode [2020-12-23 08:15:08,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:15:08,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:15:08,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:15:08,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:15:08,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:15:08,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:15:08,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:15:08,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:15:08,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (1/1) ... [2020-12-23 08:15:08,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:15:08,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:15:08,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:15:08,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:15:08,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (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 08:15:09,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:15:09,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:15:09,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:15:09,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:15:09,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:15:09,660 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 08:15:09,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:15:09 BoogieIcfgContainer [2020-12-23 08:15:09,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:15:09,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:15:09,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:15:09,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:15:09,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:15:08" (1/3) ... [2020-12-23 08:15:09,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209cba1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:15:09, skipping insertion in model container [2020-12-23 08:15:09,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:15:08" (2/3) ... [2020-12-23 08:15:09,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209cba1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:15:09, skipping insertion in model container [2020-12-23 08:15:09,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:15:09" (3/3) ... [2020-12-23 08:15:09,687 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound50.c [2020-12-23 08:15:09,703 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:15:09,715 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 08:15:09,741 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 08:15:09,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:15:09,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:15:09,787 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:15:09,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:15:09,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:15:09,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:15:09,787 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:15:09,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:15:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 08:15:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 08:15:09,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:09,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 08:15:09,813 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2020-12-23 08:15:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:09,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205414803] [2020-12-23 08:15:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:09,994 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 08:15:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205414803] [2020-12-23 08:15:09,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:15:09,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:15:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963854262] [2020-12-23 08:15:10,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:15:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:15:10,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:15:10,021 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-23 08:15:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:10,044 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-12-23 08:15:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:15:10,046 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 08:15:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:10,056 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:15:10,056 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:15:10,060 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 08:15:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:15:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:15:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:15:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 08:15:10,103 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-12-23 08:15:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:10,104 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 08:15:10,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:15:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 08:15:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 08:15:10,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:10,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 08:15:10,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:15:10,106 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 08:15:10,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:10,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63029788] [2020-12-23 08:15:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:10,235 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 08:15:10,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63029788] [2020-12-23 08:15:10,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:15:10,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 08:15:10,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453628778] [2020-12-23 08:15:10,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:15:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:15:10,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:15:10,241 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-12-23 08:15:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:10,484 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-23 08:15:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 08:15:10,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 08:15:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:10,489 INFO L225 Difference]: With dead ends: 55 [2020-12-23 08:15:10,489 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 08:15:10,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:15:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 08:15:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-12-23 08:15:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 08:15:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 08:15:10,515 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2020-12-23 08:15:10,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:10,516 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 08:15:10,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:15:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 08:15:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:15:10,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:10,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:15:10,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 08:15:10,522 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2020-12-23 08:15:10,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:10,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440030573] [2020-12-23 08:15:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:10,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:10,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402629080] [2020-12-23 08:15:10,571 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 08:15:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:15:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:10,801 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 08:15:10,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440030573] [2020-12-23 08:15:10,802 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:10,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402629080] [2020-12-23 08:15:10,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:15:10,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:15:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760222901] [2020-12-23 08:15:10,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:15:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:10,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:15:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:15:10,805 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-12-23 08:15:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:10,915 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-23 08:15:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 08:15:10,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:15:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:10,917 INFO L225 Difference]: With dead ends: 54 [2020-12-23 08:15:10,917 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 08:15:10,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:15:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 08:15:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 08:15:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 08:15:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 08:15:10,926 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 8 [2020-12-23 08:15:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:10,926 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 08:15:10,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:15:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 08:15:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:15:10,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:10,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:15:11,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 08:15:11,143 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1265507748, now seen corresponding path program 1 times [2020-12-23 08:15:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:11,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120093217] [2020-12-23 08:15:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:11,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:11,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340309114] [2020-12-23 08:15:11,160 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 08:15:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:15:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:15:11,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120093217] [2020-12-23 08:15:11,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:11,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340309114] [2020-12-23 08:15:11,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:11,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:15:11,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210801110] [2020-12-23 08:15:11,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:15:11,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:15:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:15:11,392 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2020-12-23 08:15:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:11,530 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-23 08:15:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:15:11,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 08:15:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:11,532 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:15:11,532 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 08:15:11,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:15:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 08:15:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-12-23 08:15:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 08:15:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 08:15:11,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2020-12-23 08:15:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:11,542 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 08:15:11,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:15:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 08:15:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:15:11,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:11,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:15:11,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:11,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2020-12-23 08:15:11,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:11,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099147575] [2020-12-23 08:15:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:11,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:11,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074334920] [2020-12-23 08:15:11,773 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 08:15:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 08:15:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:15:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099147575] [2020-12-23 08:15:11,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074334920] [2020-12-23 08:15:11,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:11,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:15:11,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706784650] [2020-12-23 08:15:11,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:15:11,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:11,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:15:11,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:15:11,940 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-12-23 08:15:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:12,081 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-12-23 08:15:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:15:12,081 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 08:15:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:12,082 INFO L225 Difference]: With dead ends: 61 [2020-12-23 08:15:12,082 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 08:15:12,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:15:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 08:15:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-23 08:15:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 08:15:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 08:15:12,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 16 [2020-12-23 08:15:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:12,092 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 08:15:12,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:15:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 08:15:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 08:15:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:12,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 08:15:12,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:12,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1785416430, now seen corresponding path program 2 times [2020-12-23 08:15:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:12,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755734297] [2020-12-23 08:15:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:12,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:12,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871309197] [2020-12-23 08:15:12,325 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 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 08:15:12,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:15:12,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:12,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 08:15:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:15:12,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755734297] [2020-12-23 08:15:12,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871309197] [2020-12-23 08:15:12,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:12,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:15:12,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021606548] [2020-12-23 08:15:12,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:15:12,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:15:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:15:12,497 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2020-12-23 08:15:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:12,633 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-23 08:15:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:15:12,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-23 08:15:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:12,635 INFO L225 Difference]: With dead ends: 70 [2020-12-23 08:15:12,635 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 08:15:12,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:15:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 08:15:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-12-23 08:15:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 08:15:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-23 08:15:12,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 22 [2020-12-23 08:15:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:12,644 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-23 08:15:12,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:15:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-23 08:15:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 08:15:12,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:12,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 08:15:12,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:12,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2020-12-23 08:15:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139013113] [2020-12-23 08:15:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:12,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:12,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945258545] [2020-12-23 08:15:12,874 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 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 08:15:12,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:15:12,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 08:15:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:15:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139013113] [2020-12-23 08:15:13,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:13,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945258545] [2020-12-23 08:15:13,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:13,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:15:13,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270399206] [2020-12-23 08:15:13,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:15:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:15:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:15:13,076 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-12-23 08:15:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:13,257 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-23 08:15:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:15:13,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-23 08:15:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:13,262 INFO L225 Difference]: With dead ends: 67 [2020-12-23 08:15:13,262 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 08:15:13,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:15:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 08:15:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-23 08:15:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 08:15:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 08:15:13,291 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2020-12-23 08:15:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:13,291 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 08:15:13,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:15:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 08:15:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 08:15:13,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:13,294 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 08:15:13,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 08:15:13,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 1 times [2020-12-23 08:15:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433902133] [2020-12-23 08:15:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:13,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:13,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310341348] [2020-12-23 08:15:13,525 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 08:15:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:15:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:15:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:15:13,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433902133] [2020-12-23 08:15:13,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:13,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310341348] [2020-12-23 08:15:13,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:13,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:15:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870074267] [2020-12-23 08:15:13,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:15:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:15:13,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:15:13,705 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-12-23 08:15:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:13,856 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-23 08:15:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:15:13,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 08:15:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:13,858 INFO L225 Difference]: With dead ends: 65 [2020-12-23 08:15:13,858 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 08:15:13,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:15:13,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 08:15:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-23 08:15:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:15:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 08:15:13,865 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 26 [2020-12-23 08:15:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:13,865 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 08:15:13,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:15:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 08:15:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 08:15:13,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:13,867 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 08:15:14,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:14,082 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1822162560, now seen corresponding path program 3 times [2020-12-23 08:15:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:14,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149560506] [2020-12-23 08:15:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:14,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:14,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353687709] [2020-12-23 08:15:14,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:15:14,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 08:15:14,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:15:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 08:15:14,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149560506] [2020-12-23 08:15:14,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:14,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353687709] [2020-12-23 08:15:14,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:14,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:15:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921840762] [2020-12-23 08:15:14,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:15:14,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:14,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:15:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:15:14,223 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 5 states. [2020-12-23 08:15:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:15:14,300 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 08:15:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:15:14,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 08:15:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:15:14,301 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:15:14,301 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 08:15:14,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:15:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 08:15:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 08:15:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 08:15:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 08:15:14,309 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2020-12-23 08:15:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:15:14,309 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 08:15:14,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:15:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 08:15:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 08:15:14,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:15:14,311 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-23 08:15:14,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:15:14,525 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:15:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:15:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1248592163, now seen corresponding path program 3 times [2020-12-23 08:15:14,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:15:14,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160926593] [2020-12-23 08:15:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:15:14,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:15:14,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380069647] [2020-12-23 08:15:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:15:14,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 08:15:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:15:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 08:15:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:15:16,689 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_ULTIMATE.start_main_~a~0))) (and (= (+ .cse0 1) c_ULTIMATE.start_main_~t~0) (let ((.cse1 (= (+ (* 2 c_ULTIMATE.start_main_~t~0) (* c_ULTIMATE.start_main_~t~0 c_ULTIMATE.start_main_~t~0) 1) (* 4 c_ULTIMATE.start_main_~s~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse1)) (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse1))) (= c_ULTIMATE.start_main_~s~0 (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0) .cse0 1)))) is different from false [2020-12-23 08:15:26,486 WARN L197 SmtUtils]: Spent 5.01 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-23 08:15:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 08:15:26,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160926593] [2020-12-23 08:15:26,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:15:26,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380069647] [2020-12-23 08:15:26,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:15:26,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:15:26,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392215480] [2020-12-23 08:15:26,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:15:26,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:15:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:15:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=51, Unknown=2, NotChecked=14, Total=90 [2020-12-23 08:15:26,547 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 10 states. [2020-12-23 08:15:35,276 WARN L197 SmtUtils]: Spent 8.72 s on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2020-12-23 08:16:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:50,419 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 08:16:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:16:50,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-23 08:16:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:50,420 INFO L225 Difference]: With dead ends: 55 [2020-12-23 08:16:50,420 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 08:16:50,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=4, NotChecked=20, Total=156 [2020-12-23 08:16:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 08:16:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-23 08:16:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 08:16:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 08:16:50,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 32 [2020-12-23 08:16:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:50,433 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 08:16:50,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:16:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 08:16:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 08:16:50,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:50,435 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:50,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 08:16:50,636 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 26039134, now seen corresponding path program 1 times [2020-12-23 08:16:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:50,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949926581] [2020-12-23 08:16:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:50,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:50,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477801234] [2020-12-23 08:16:50,660 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:16:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 08:16:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:16:50,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949926581] [2020-12-23 08:16:50,850 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:50,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477801234] [2020-12-23 08:16:50,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:50,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:16:50,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755668630] [2020-12-23 08:16:50,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:16:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:50,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:16:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:16:50,853 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 7 states. [2020-12-23 08:16:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:50,920 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 08:16:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:16:50,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-12-23 08:16:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:50,922 INFO L225 Difference]: With dead ends: 62 [2020-12-23 08:16:50,922 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 08:16:50,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:16:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 08:16:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 08:16:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 08:16:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 08:16:50,932 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 33 [2020-12-23 08:16:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:50,933 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 08:16:50,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:16:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 08:16:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 08:16:50,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:50,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 08:16:51,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:51,149 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1601348966, now seen corresponding path program 2 times [2020-12-23 08:16:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487149502] [2020-12-23 08:16:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:51,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:51,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328229954] [2020-12-23 08:16:51,162 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:51,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 08:16:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:16:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 08:16:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 08:16:51,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487149502] [2020-12-23 08:16:51,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328229954] [2020-12-23 08:16:51,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:16:51,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 08:16:51,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347584949] [2020-12-23 08:16:51,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:16:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:51,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:16:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:16:51,446 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 7 states. [2020-12-23 08:17:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:17:08,971 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 08:17:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:17:08,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 08:17:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:17:08,973 INFO L225 Difference]: With dead ends: 52 [2020-12-23 08:17:08,973 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 08:17:08,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:17:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 08:17:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 08:17:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 08:17:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 08:17:08,986 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 34 [2020-12-23 08:17:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:17:08,986 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 08:17:08,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:17:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 08:17:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:17:08,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:17:08,991 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:17:09,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:17:09,192 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:17:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:17:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1133040244, now seen corresponding path program 2 times [2020-12-23 08:17:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:17:09,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419673815] [2020-12-23 08:17:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:17:09,220 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:17:09,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208490825] [2020-12-23 08:17:09,223 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:17:09,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:17:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:17:09,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:17:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:17:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:17:09,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419673815] [2020-12-23 08:17:09,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:17:09,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208490825] [2020-12-23 08:17:09,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:17:09,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:17:09,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978297049] [2020-12-23 08:17:09,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:17:09,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:17:09,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:17:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:17:09,420 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 8 states. [2020-12-23 08:17:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:17:09,496 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 08:17:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 08:17:09,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-23 08:17:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:17:09,498 INFO L225 Difference]: With dead ends: 76 [2020-12-23 08:17:09,498 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 08:17:09,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 08:17:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 08:17:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-12-23 08:17:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 08:17:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-23 08:17:09,509 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2020-12-23 08:17:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:17:09,509 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-23 08:17:09,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:17:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-23 08:17:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 08:17:09,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:17:09,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:17:09,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 08:17:09,726 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:17:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:17:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -977613196, now seen corresponding path program 1 times [2020-12-23 08:17:09,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:17:09,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988429552] [2020-12-23 08:17:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:17:09,737 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:17:09,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977866858] [2020-12-23 08:17:09,738 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:17:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:17:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 08:17:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:17:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988429552] [2020-12-23 08:17:09,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:17:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977866858] [2020-12-23 08:17:09,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:17:09,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:17:09,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:17:09,867 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:17:09,867 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:17:10,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 08:17:10,107 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:17:10,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:17:10 BoogieIcfgContainer [2020-12-23 08:17:10,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:17:10,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:17:10,108 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:17:10,109 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:17:10,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:15:09" (3/4) ... [2020-12-23 08:17:10,113 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:17:10,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:17:10,115 INFO L168 Benchmark]: Toolchain (without parser) took 121646.95 ms. Allocated memory was 158.3 MB in the beginning and 202.4 MB in the end (delta: 44.0 MB). Free memory was 134.5 MB in the beginning and 83.3 MB in the end (delta: 51.2 MB). Peak memory consumption was 96.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,115 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 158.3 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:17:10,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 158.3 MB. Free memory was 134.3 MB in the beginning and 124.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.00 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,117 INFO L168 Benchmark]: Boogie Preprocessor took 66.34 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 121.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,117 INFO L168 Benchmark]: RCFGBuilder took 704.52 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 139.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,118 INFO L168 Benchmark]: TraceAbstraction took 120437.51 ms. Allocated memory was 158.3 MB in the beginning and 202.4 MB in the end (delta: 44.0 MB). Free memory was 139.1 MB in the beginning and 83.3 MB in the end (delta: 55.8 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:17:10,118 INFO L168 Benchmark]: Witness Printer took 4.89 ms. Allocated memory is still 202.4 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:17:10,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 158.3 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 158.3 MB. Free memory was 134.3 MB in the beginning and 124.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.00 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 122.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.34 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 121.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 704.52 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 139.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 120437.51 ms. Allocated memory was 158.3 MB in the beginning and 202.4 MB in the end (delta: 44.0 MB). Free memory was 139.1 MB in the beginning and 83.3 MB in the end (delta: 55.8 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.89 ms. Allocated memory is still 202.4 MB. Free memory is still 83.3 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 counter = 0; [L22] int n; [L23] long long a, s, t; [L24] n = __VERIFIER_nondet_int() [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] EXPR counter++ [L30] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<50 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND TRUE !(s <= n) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 120.3s, OverallIterations: 14, TraceHistogramMax: 5, AutomataDifference: 102.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 296 SDslu, 619 SDs, 0 SdLazy, 652 SolverSat, 171 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 63.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 224 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 51.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 292 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 279 ConstructedInterpolants, 0 QuantifiedInterpolants, 38681 SizeOfPredicates, 60 NumberOfNonLiveVariables, 1114 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 113/265 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...