/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/ps4-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:59:37,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:59:37,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:59:37,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:59:37,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:59:37,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:59:37,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:59:37,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:59:37,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:59:37,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:59:37,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:59:37,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:59:37,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:59:37,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:59:37,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:59:37,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:59:37,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:59:37,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:59:37,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:59:37,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:59:37,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:59:37,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:59:37,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:59:37,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:59:37,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:59:37,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:59:37,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:59:37,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:59:37,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:59:37,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:59:37,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:59:37,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:59:37,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:59:37,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:59:37,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:59:37,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:59:37,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:59:37,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:59:37,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:59:37,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:59:37,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:59:37,187 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:59:37,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:59:37,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:59:37,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:59:37,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:59:37,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:59:37,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:59:37,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:59:37,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:59:37,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:59:37,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:59:37,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:59:37,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:59:37,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:37,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:59:37,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:59:37,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:59:37,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:59:37,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:59:37,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:59:37,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:59:37,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:59:37,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:59:37,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:59:37,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:59:37,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:59:37,608 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:59:37,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-01-06 17:59:37,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b993cd449/60a2a692513145aaa99bc8c225f8cc46/FLAGd40b67731 [2021-01-06 17:59:38,314 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:59:38,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-01-06 17:59:38,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b993cd449/60a2a692513145aaa99bc8c225f8cc46/FLAGd40b67731 [2021-01-06 17:59:38,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b993cd449/60a2a692513145aaa99bc8c225f8cc46 [2021-01-06 17:59:38,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:59:38,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:59:38,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:38,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:59:38,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:59:38,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce247ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38, skipping insertion in model container [2021-01-06 17:59:38,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:38,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:59:38,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:59:38,886 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/ps4-ll_valuebound5.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 17:59:38,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:38,926 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:59:38,943 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/ps4-ll_valuebound5.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 17:59:38,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:59:38,993 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:59:38,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38 WrapperNode [2021-01-06 17:59:38,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:59:39,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:39,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:59:39,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:59:39,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:59:39,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:59:39,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:59:39,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:59:39,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... [2021-01-06 17:59:39,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:59:39,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:59:39,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:59:39,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:59:39,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:59:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:59:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:59:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:59:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:59:39,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:59:39,603 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:59:39,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:39 BoogieIcfgContainer [2021-01-06 17:59:39,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:59:39,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:59:39,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:59:39,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:59:39,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:59:38" (1/3) ... [2021-01-06 17:59:39,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664025cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:39, skipping insertion in model container [2021-01-06 17:59:39,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:59:38" (2/3) ... [2021-01-06 17:59:39,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664025cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:59:39, skipping insertion in model container [2021-01-06 17:59:39,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:59:39" (3/3) ... [2021-01-06 17:59:39,631 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.c [2021-01-06 17:59:39,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:59:39,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:59:39,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:59:39,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:59:39,744 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:59:39,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:59:39,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:59:39,745 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:59:39,745 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:59:39,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:59:39,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:59:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:59:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:39,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:39,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:39,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:59:39,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:39,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358693505] [2021-01-06 17:59:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:40,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358693505] [2021-01-06 17:59:40,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:40,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:59:40,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274606159] [2021-01-06 17:59:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:59:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:59:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:40,070 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:59:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:40,091 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 17:59:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:59:40,093 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:59:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:40,115 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:59:40,116 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:59:40,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:59:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:59:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:59:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:59:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 17:59:40,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-01-06 17:59:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:40,160 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 17:59:40,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:59:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 17:59:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:59:40,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:40,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:40,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:59:40,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:59:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:40,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724787501] [2021-01-06 17:59:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:40,207 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:40,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142154806] [2021-01-06 17:59:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:59:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:40,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724787501] [2021-01-06 17:59:40,464 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:40,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142154806] [2021-01-06 17:59:40,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:59:40,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:59:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114833983] [2021-01-06 17:59:40,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:59:40,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:40,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:59:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:59:40,479 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2021-01-06 17:59:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:40,614 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 17:59:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:59:40,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:59:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:40,615 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:59:40,616 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:59:40,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:59:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 17:59:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:59:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 17:59:40,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-01-06 17:59:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:40,623 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 17:59:40,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:59:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 17:59:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:59:40,624 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:40,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:40,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:59:40,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-01-06 17:59:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:40,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061595578] [2021-01-06 17:59:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:40,861 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:40,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203736784] [2021-01-06 17:59:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:59:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:40,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061595578] [2021-01-06 17:59:40,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203736784] [2021-01-06 17:59:40,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:40,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:59:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559041702] [2021-01-06 17:59:40,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:59:40,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:59:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:59:40,986 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2021-01-06 17:59:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:41,126 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 17:59:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:41,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:59:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:41,128 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:59:41,128 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:41,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 17:59:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:59:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:59:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 17:59:41,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2021-01-06 17:59:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:41,137 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 17:59:41,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:59:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 17:59:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:41,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:41,138 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:41,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,352 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-01-06 17:59:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:41,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266500999] [2021-01-06 17:59:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:41,371 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274119719] [2021-01-06 17:59:41,372 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:59:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:59:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:59:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:59:41,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266500999] [2021-01-06 17:59:41,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:41,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274119719] [2021-01-06 17:59:41,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529338254] [2021-01-06 17:59:41,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:41,603 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2021-01-06 17:59:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:41,751 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 17:59:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:59:41,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:41,754 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:59:41,755 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:59:41,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:59:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:59:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 17:59:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:59:41,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-01-06 17:59:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:41,771 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:59:41,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:59:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:59:41,774 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:41,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:41,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:41,989 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-01-06 17:59:41,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:41,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747763966] [2021-01-06 17:59:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:42,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:42,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371528851] [2021-01-06 17:59:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:59:42,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:59:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:59:42,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:59:42,218 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 17:59:42,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747763966] [2021-01-06 17:59:42,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:59:42,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371528851] [2021-01-06 17:59:42,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:59:42,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:59:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634558503] [2021-01-06 17:59:42,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:59:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:59:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:59:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:59:42,226 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 17:59:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:59:42,482 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-01-06 17:59:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:59:42,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:59:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:59:42,484 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:59:42,485 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:59:42,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:59:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:59:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:59:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:59:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:59:42,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2021-01-06 17:59:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:59:42,503 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:59:42,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:59:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:59:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:59:42,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:59:42,504 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:59:42,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:59:42,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:59:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:59:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-01-06 17:59:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:59:42,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328334790] [2021-01-06 17:59:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:59:42,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:59:42,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703506859] [2021-01-06 17:59:42,734 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 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