/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/ps5-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:09:22,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:09:22,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:09:22,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:09:22,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:09:22,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:09:22,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:09:22,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:09:22,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:09:22,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:09:22,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:09:22,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:09:22,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:09:22,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:09:22,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:09:22,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:09:22,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:09:22,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:09:22,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:09:22,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:09:22,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:09:22,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:09:22,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:09:22,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:09:22,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:09:22,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:09:22,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:09:22,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:09:22,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:09:22,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:09:22,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:09:22,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:09:22,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:09:22,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:09:22,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:09:22,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:09:22,652 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 08:09:22,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:09:22,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:09:22,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:09:22,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:09:22,680 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:09:22,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:09:22,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:09:22,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:09:22,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:09:22,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:09:22,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:09:22,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:09:22,682 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:09:22,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:09:22,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:09:22,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:09:22,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:09:22,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:09:22,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:09:22,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:09:22,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:09:22,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:09:22,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:09:22,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:09:22,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:09:22,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:09:23,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:09:23,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:09:23,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:09:23,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:09:23,089 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:09:23,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-23 08:09:23,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ec6915dd/233a5249691a46caba4fbc8135c95b3e/FLAG98756eaf1 [2020-12-23 08:09:23,755 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:09:23,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2020-12-23 08:09:23,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ec6915dd/233a5249691a46caba4fbc8135c95b3e/FLAG98756eaf1 [2020-12-23 08:09:24,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6ec6915dd/233a5249691a46caba4fbc8135c95b3e [2020-12-23 08:09:24,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:09:24,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:09:24,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:09:24,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:09:24,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:09:24,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d882e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24, skipping insertion in model container [2020-12-23 08:09:24,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:09:24,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:09:24,299 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/ps5-ll_unwindbound5.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,] [2020-12-23 08:09:24,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:09:24,333 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:09:24,349 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/ps5-ll_unwindbound5.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,] [2020-12-23 08:09:24,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:09:24,375 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:09:24,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24 WrapperNode [2020-12-23 08:09:24,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:09:24,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:09:24,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:09:24,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:09:24,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:09:24,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:09:24,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:09:24,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:09:24,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (1/1) ... [2020-12-23 08:09:24,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:09:24,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:09:24,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:09:24,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:09:24,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (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 08:09:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:09:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:09:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:09:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:09:25,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:09:25,020 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:09:25,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:09:25 BoogieIcfgContainer [2020-12-23 08:09:25,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:09:25,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:09:25,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:09:25,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:09:25,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:09:24" (1/3) ... [2020-12-23 08:09:25,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523dffa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:09:25, skipping insertion in model container [2020-12-23 08:09:25,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:09:24" (2/3) ... [2020-12-23 08:09:25,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523dffa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:09:25, skipping insertion in model container [2020-12-23 08:09:25,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:09:25" (3/3) ... [2020-12-23 08:09:25,049 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2020-12-23 08:09:25,070 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:09:25,078 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:09:25,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:09:25,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:09:25,145 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:09:25,145 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:09:25,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:09:25,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:09:25,146 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:09:25,146 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:09:25,146 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:09:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 08:09:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:09:25,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:25,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:25,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-23 08:09:25,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:25,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883975781] [2020-12-23 08:09:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:09:25,355 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 08:09:25,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883975781] [2020-12-23 08:09:25,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:09:25,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:09:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161062590] [2020-12-23 08:09:25,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:09:25,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:09:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:09:25,382 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-23 08:09:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:25,402 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-23 08:09:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:09:25,404 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:09:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:25,414 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:09:25,414 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:09:25,417 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 08:09:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:09:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 08:09:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 08:09:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 08:09:25,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-23 08:09:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:25,459 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 08:09:25,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:09:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 08:09:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:09:25,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:25,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:25,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:09:25,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:09:25,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:25,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157740084] [2020-12-23 08:09:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:25,483 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:25,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72292110] [2020-12-23 08:09:25,484 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 08:09:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:09:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:09:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:25,699 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 08:09:25,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157740084] [2020-12-23 08:09:25,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:25,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72292110] [2020-12-23 08:09:25,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:09:25,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:09:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132992509] [2020-12-23 08:09:25,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:09:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:09:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:09:25,708 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-23 08:09:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:25,835 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-23 08:09:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:09:25,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 08:09:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:25,836 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:09:25,837 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 08:09:25,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:09:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 08:09:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 08:09:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:09:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 08:09:25,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-23 08:09:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:25,846 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 08:09:25,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:09:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 08:09:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 08:09:25,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:25,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:26,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:09:26,062 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-23 08:09:26,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:26,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521886892] [2020-12-23 08:09:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:26,082 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:26,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30548003] [2020-12-23 08:09:26,082 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 08:09:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:09:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:09:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:26,337 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 08:09:26,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521886892] [2020-12-23 08:09:26,338 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30548003] [2020-12-23 08:09:26,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:09:26,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:09:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36082205] [2020-12-23 08:09:26,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:09:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:09:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:09:26,342 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-23 08:09:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:26,497 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 08:09:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:09:26,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 08:09:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:26,499 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:09:26,500 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 08:09:26,501 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 [2020-12-23 08:09:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 08:09:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 08:09:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:09:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 08:09:26,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-23 08:09:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:26,510 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 08:09:26,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:09:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 08:09:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:09:26,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:26,511 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:26,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:09:26,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-23 08:09:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:26,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266696642] [2020-12-23 08:09:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:26,744 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:26,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99511457] [2020-12-23 08:09:26,744 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 08:09:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:09:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:09:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:09:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266696642] [2020-12-23 08:09:26,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99511457] [2020-12-23 08:09:26,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:09:26,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:09:26,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872758607] [2020-12-23 08:09:26,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:09:26,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:09:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:09:26,866 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-23 08:09:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:26,918 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 08:09:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:09:26,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 08:09:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:26,921 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:09:26,921 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:09:26,923 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 [2020-12-23 08:09:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:09:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:09:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:09:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 08:09:26,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-23 08:09:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:26,936 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 08:09:26,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:09:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 08:09:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:09:26,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:26,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:27,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:09:27,142 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:27,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-23 08:09:27,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:27,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536344757] [2020-12-23 08:09:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:27,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:27,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798092958] [2020-12-23 08:09:27,162 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 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 08:09:27,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:09:27,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:09:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 08:09:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:09:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536344757] [2020-12-23 08:09:27,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798092958] [2020-12-23 08:09:27,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:09:27,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:09:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088490800] [2020-12-23 08:09:27,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:09:27,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:09:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:09:27,497 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 08:09:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:27,690 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 08:09:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:09:27,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 08:09:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:27,692 INFO L225 Difference]: With dead ends: 49 [2020-12-23 08:09:27,692 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 08:09:27,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:09:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 08:09:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-23 08:09:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:09:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:09:27,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-23 08:09:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:09:27,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:09:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:09:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:09:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:27,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:27,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:09:27,909 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-23 08:09:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:27,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391345435] [2020-12-23 08:09:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:27,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:27,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097393636] [2020-12-23 08:09:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:09:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:09:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 08:09:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:28,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:09:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:09:28,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391345435] [2020-12-23 08:09:28,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:28,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097393636] [2020-12-23 08:09:28,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:09:28,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:09:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89561421] [2020-12-23 08:09:28,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:09:28,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:09:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:09:28,132 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-23 08:09:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:28,336 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-23 08:09:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:09:28,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 08:09:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:28,337 INFO L225 Difference]: With dead ends: 38 [2020-12-23 08:09:28,337 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:09:28,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:09:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:09:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:09:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:09:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 08:09:28,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-23 08:09:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:28,345 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 08:09:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:09:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 08:09:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 08:09:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:28,346 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:28,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:09:28,562 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-23 08:09:28,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:28,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635280609] [2020-12-23 08:09:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:28,576 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:28,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734529080] [2020-12-23 08:09:28,577 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 [2020-12-23 08:09:28,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:09:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:09:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:09:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:09:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:09:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635280609] [2020-12-23 08:09:28,710 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:09:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734529080] [2020-12-23 08:09:28,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:09:28,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:09:28,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069145638] [2020-12-23 08:09:28,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:09:28,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:09:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:09:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:09:28,712 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-23 08:09:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:09:28,758 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 08:09:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:09:28,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 08:09:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:09:28,759 INFO L225 Difference]: With dead ends: 38 [2020-12-23 08:09:28,759 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:09:28,760 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 [2020-12-23 08:09:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:09:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:09:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:09:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 08:09:28,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-23 08:09:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:09:28,769 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 08:09:28,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:09:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 08:09:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 08:09:28,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:09:28,770 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:09:28,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:09:28,984 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:09:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:09:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-23 08:09:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:09:28,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036452471] [2020-12-23 08:09:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:09:28,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:09:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044647597] [2020-12-23 08:09:28,998 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