/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/ps6-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:04:45,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:04:45,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:04:45,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:04:45,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:04:45,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:04:45,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:04:45,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:04:45,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:04:45,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:04:45,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:04:45,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:04:45,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:04:45,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:04:45,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:04:45,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:04:45,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:04:45,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:04:45,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:04:45,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:04:45,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:04:45,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:04:45,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:04:45,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:04:45,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:04:45,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:04:45,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:04:45,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:04:45,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:04:45,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:04:45,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:04:45,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:04:45,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:04:45,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:04:45,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:04:45,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:04:45,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 18:04:45,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:04:45,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:04:45,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:04:45,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:04:45,868 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:04:45,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:04:45,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:04:45,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:04:45,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:04:45,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:04:45,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:04:45,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:04:45,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:04:45,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:04:45,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:04:45,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:04:45,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:04:45,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:04:45,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:04:45,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:04:45,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:04:45,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:04:45,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:04:45,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:04:45,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:04:45,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:04:46,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:04:46,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:04:46,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:04:46,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:04:46,360 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:04:46,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-01-06 18:04:46,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a78b674be/93f1993051f04b238b21c46265c97465/FLAG83352d12f [2021-01-06 18:04:47,155 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:04:47,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-01-06 18:04:47,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a78b674be/93f1993051f04b238b21c46265c97465/FLAG83352d12f [2021-01-06 18:04:47,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a78b674be/93f1993051f04b238b21c46265c97465 [2021-01-06 18:04:47,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:04:47,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:04:47,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:04:47,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:04:47,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:04:47,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161529f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47, skipping insertion in model container [2021-01-06 18:04:47,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:04:47,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:04:47,734 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/ps6-ll_unwindbound50.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 18:04:47,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:04:47,771 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:04:47,785 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/ps6-ll_unwindbound50.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 18:04:47,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:04:47,812 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:04:47,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47 WrapperNode [2021-01-06 18:04:47,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:04:47,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:04:47,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:04:47,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:04:47,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:04:47,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:04:47,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:04:47,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:04:47,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... [2021-01-06 18:04:47,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:04:47,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:04:47,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:04:47,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:04:47,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:04:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:04:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:04:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:04:48,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:04:48,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:04:48,477 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 18:04:48,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:04:48 BoogieIcfgContainer [2021-01-06 18:04:48,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:04:48,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:04:48,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:04:48,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:04:48,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:04:47" (1/3) ... [2021-01-06 18:04:48,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab2635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:04:48, skipping insertion in model container [2021-01-06 18:04:48,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:47" (2/3) ... [2021-01-06 18:04:48,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aab2635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:04:48, skipping insertion in model container [2021-01-06 18:04:48,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:04:48" (3/3) ... [2021-01-06 18:04:48,506 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2021-01-06 18:04:48,521 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:04:48,529 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 18:04:48,554 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 18:04:48,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:04:48,596 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:04:48,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:04:48,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:04:48,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:04:48,597 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:04:48,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:04:48,598 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:04:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 18:04:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 18:04:48,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:48,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:48,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-01-06 18:04:48,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:48,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948408182] [2021-01-06 18:04:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:04:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948408182] [2021-01-06 18:04:48,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:04:48,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:04:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460136329] [2021-01-06 18:04:48,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:04:48,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:04:48,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:04:48,930 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2021-01-06 18:04:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:04:48,959 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-01-06 18:04:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:04:48,961 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 18:04:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:04:48,983 INFO L225 Difference]: With dead ends: 41 [2021-01-06 18:04:48,983 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 18:04:48,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:04:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 18:04:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 18:04:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 18:04:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 18:04:49,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-01-06 18:04:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:04:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 18:04:49,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:04:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 18:04:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 18:04:49,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:49,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:49,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:04:49,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 18:04:49,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:49,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824556318] [2021-01-06 18:04:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:49,080 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:04:49,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408480195] [2021-01-06 18:04:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:04:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:04:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:04:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:04:49,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824556318] [2021-01-06 18:04:49,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:04:49,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408480195] [2021-01-06 18:04:49,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:04:49,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 18:04:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461325801] [2021-01-06 18:04:49,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:04:49,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:04:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:04:49,415 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2021-01-06 18:05:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:12,187 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-06 18:05:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:05:12,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 18:05:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:12,190 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:05:12,190 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 18:05:12,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:05:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 18:05:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 18:05:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 18:05:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 18:05:12,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-01-06 18:05:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 18:05:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:05:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 18:05:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 18:05:12,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:12,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:12,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 18:05:12,417 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-01-06 18:05:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:12,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217169510] [2021-01-06 18:05:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:12,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:12,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028109460] [2021-01-06 18:05:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:05:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 18:05:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217169510] [2021-01-06 18:05:12,574 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:12,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028109460] [2021-01-06 18:05:12,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:12,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:05:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430453389] [2021-01-06 18:05:12,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:05:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:05:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:05:12,577 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2021-01-06 18:05:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:12,744 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 18:05:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:05:12,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 18:05:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:12,746 INFO L225 Difference]: With dead ends: 39 [2021-01-06 18:05:12,747 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 18:05:12,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:05:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 18:05:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 18:05:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 18:05:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 18:05:12,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-01-06 18:05:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:12,757 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 18:05:12,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:05:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 18:05:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 18:05:12,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:12,758 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:12,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:12,973 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:12,975 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-01-06 18:05:12,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:12,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052775410] [2021-01-06 18:05:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:12,996 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:12,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38228016] [2021-01-06 18:05:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:05:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 18:05:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:13,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052775410] [2021-01-06 18:05:13,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:13,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38228016] [2021-01-06 18:05:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 18:05:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080147615] [2021-01-06 18:05:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:05:13,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:05:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:05:13,124 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2021-01-06 18:05:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:13,158 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 18:05:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:05:13,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 18:05:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:13,159 INFO L225 Difference]: With dead ends: 34 [2021-01-06 18:05:13,159 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 18:05:13,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:05:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 18:05:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 18:05:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 18:05:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 18:05:13,166 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-01-06 18:05:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:13,167 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 18:05:13,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:05:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 18:05:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 18:05:13,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:13,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:13,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:13,385 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:13,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2021-01-06 18:05:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:13,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711837150] [2021-01-06 18:05:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:13,401 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:13,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937733050] [2021-01-06 18:05:13,402 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 [2021-01-06 18:05:13,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:05:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:05:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 18:05:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:13,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711837150] [2021-01-06 18:05:13,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:13,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937733050] [2021-01-06 18:05:13,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:13,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:05:13,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668157852] [2021-01-06 18:05:13,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:05:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:05:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:05:13,655 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2021-01-06 18:05:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:13,908 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-01-06 18:05:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 18:05:13,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 18:05:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:13,910 INFO L225 Difference]: With dead ends: 49 [2021-01-06 18:05:13,910 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 18:05:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-01-06 18:05:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 18:05:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-01-06 18:05:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 18:05:13,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-01-06 18:05:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:13,919 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 18:05:13,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:05:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 18:05:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 18:05:13,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:13,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:14,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:14,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-01-06 18:05:14,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:14,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024935924] [2021-01-06 18:05:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:14,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:14,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427306020] [2021-01-06 18:05:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:05:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 18:05:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:14,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 18:05:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:14,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024935924] [2021-01-06 18:05:14,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:14,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427306020] [2021-01-06 18:05:14,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:14,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 18:05:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180801193] [2021-01-06 18:05:14,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 18:05:14,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 18:05:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 18:05:14,406 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2021-01-06 18:05:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:14,742 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 18:05:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:05:14,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 18:05:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:14,743 INFO L225 Difference]: With dead ends: 39 [2021-01-06 18:05:14,743 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 18:05:14,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-06 18:05:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 18:05:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-01-06 18:05:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 18:05:14,751 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2021-01-06 18:05:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:14,751 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 18:05:14,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 18:05:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 18:05:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 18:05:14,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:14,752 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:14,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 18:05:14,966 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2021-01-06 18:05:14,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:14,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821112642] [2021-01-06 18:05:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:14,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:14,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819884298] [2021-01-06 18:05:14,980 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:15,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:05:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:05:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 18:05:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:15,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821112642] [2021-01-06 18:05:15,084 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819884298] [2021-01-06 18:05:15,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:15,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 18:05:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700731516] [2021-01-06 18:05:15,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:05:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:05:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:05:15,086 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2021-01-06 18:05:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:17,972 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 18:05:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:05:17,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 18:05:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:17,976 INFO L225 Difference]: With dead ends: 38 [2021-01-06 18:05:17,976 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 18:05:17,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:05:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 18:05:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 18:05:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 18:05:17,984 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2021-01-06 18:05:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:17,985 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 18:05:17,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:05:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 18:05:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 18:05:17,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:17,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:18,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:18,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2021-01-06 18:05:18,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:18,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188805065] [2021-01-06 18:05:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:18,215 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:18,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676527251] [2021-01-06 18:05:18,215 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