/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/divbin2_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:26:19,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:26:19,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:26:19,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:26:19,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:26:19,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:26:19,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:26:19,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:26:19,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:26:19,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:26:19,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:26:19,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:26:19,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:26:19,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:26:19,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:26:19,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:26:19,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:26:19,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:26:19,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:26:19,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:26:19,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:26:19,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:26:19,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:26:19,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:26:20,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:26:20,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:26:20,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:26:20,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:26:20,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:26:20,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:26:20,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:26:20,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:26:20,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:26:20,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:26:20,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:26:20,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:26:20,015 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 17:26:20,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:26:20,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:26:20,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:26:20,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:26:20,048 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:26:20,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:26:20,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:26:20,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:26:20,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:26:20,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:26:20,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:26:20,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:26:20,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:26:20,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:26:20,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:26:20,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:26:20,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:26:20,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:26:20,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:26:20,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:26:20,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:26:20,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:26:20,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:26:20,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:26:20,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:26:20,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:26:20,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:26:20,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:26:20,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:26:20,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:26:20,537 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:26:20,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2021-01-06 17:26:20,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/14a49efa9/de8a51513ef046edb07f30910bffc8c8/FLAG61cd4089a [2021-01-06 17:26:21,251 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:26:21,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2021-01-06 17:26:21,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/14a49efa9/de8a51513ef046edb07f30910bffc8c8/FLAG61cd4089a [2021-01-06 17:26:21,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/14a49efa9/de8a51513ef046edb07f30910bffc8c8 [2021-01-06 17:26:21,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:26:21,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:26:21,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:21,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:26:21,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:26:21,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:21" (1/1) ... [2021-01-06 17:26:21,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b55cb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:21, skipping insertion in model container [2021-01-06 17:26:21,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:21" (1/1) ... [2021-01-06 17:26:21,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:26:21,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:26:21,900 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/divbin2_unwindbound100.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:26:21,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:21,942 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:26:21,962 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/divbin2_unwindbound100.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:26:21,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:22,011 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:26:22,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22 WrapperNode [2021-01-06 17:26:22,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:22,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:22,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:26:22,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:26:22,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:22,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:26:22,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:26:22,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:26:22,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (1/1) ... [2021-01-06 17:26:22,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:26:22,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:26:22,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:26:22,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:26:22,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (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 17:26:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:26:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:26:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:26:22,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:26:22,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:26:22,626 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:26:22,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:22 BoogieIcfgContainer [2021-01-06 17:26:22,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:26:22,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:26:22,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:26:22,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:26:22,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:26:21" (1/3) ... [2021-01-06 17:26:22,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553361c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:22, skipping insertion in model container [2021-01-06 17:26:22,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:22" (2/3) ... [2021-01-06 17:26:22,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553361c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:22, skipping insertion in model container [2021-01-06 17:26:22,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:22" (3/3) ... [2021-01-06 17:26:22,656 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.i [2021-01-06 17:26:22,670 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:26:22,682 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:26:22,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:26:22,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:26:22,789 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:26:22,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:26:22,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:26:22,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:26:22,790 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:26:22,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:26:22,790 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:26:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:26:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:26:22,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:22,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:22,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-01-06 17:26:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127287229] [2021-01-06 17:26:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:23,031 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 17:26:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127287229] [2021-01-06 17:26:23,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:23,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:26:23,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921891855] [2021-01-06 17:26:23,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:26:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:26:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:26:23,066 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:26:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:23,086 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-01-06 17:26:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:26:23,087 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:26:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:23,098 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:26:23,099 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:26:23,104 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 17:26:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:26:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:26:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:26:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 17:26:23,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-01-06 17:26:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:23,144 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 17:26:23,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:26:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 17:26:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:26:23,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:23,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:23,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:26:23,147 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:23,149 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-01-06 17:26:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:23,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845170267] [2021-01-06 17:26:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:23,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:23,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008705777] [2021-01-06 17:26:23,178 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 17:26:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:26:23,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:23,331 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 17:26:23,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845170267] [2021-01-06 17:26:23,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:23,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008705777] [2021-01-06 17:26:23,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:23,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:23,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575006744] [2021-01-06 17:26:23,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:26:23,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:23,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:26:23,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:26:23,336 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2021-01-06 17:26:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:23,356 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 17:26:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:26:23,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 17:26:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:23,358 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:26:23,358 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:26:23,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:26:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:26:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 17:26:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:26:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 17:26:23,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-01-06 17:26:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:23,365 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 17:26:23,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:26:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 17:26:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:26:23,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:23,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:23,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:26:23,582 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-01-06 17:26:23,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:23,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923433422] [2021-01-06 17:26:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:23,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:23,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886199813] [2021-01-06 17:26:23,608 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 17:26:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:23,737 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 17:26:23,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923433422] [2021-01-06 17:26:23,738 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:23,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886199813] [2021-01-06 17:26:23,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:23,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:26:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838209667] [2021-01-06 17:26:23,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:23,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:23,741 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 17:26:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:23,842 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-01-06 17:26:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:23,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 17:26:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:23,844 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:26:23,844 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:26:23,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:26:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 17:26:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:26:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 17:26:23,851 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-01-06 17:26:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:23,851 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 17:26:23,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 17:26:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:26:23,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:23,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:24,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:24,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-01-06 17:26:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:24,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900444709] [2021-01-06 17:26:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:24,094 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:24,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723775551] [2021-01-06 17:26:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:24,215 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 17:26:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900444709] [2021-01-06 17:26:24,215 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:24,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723775551] [2021-01-06 17:26:24,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:24,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:26:24,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880182900] [2021-01-06 17:26:24,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:24,218 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-06 17:26:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:24,254 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-01-06 17:26:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:24,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 17:26:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:24,256 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:26:24,256 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:26:24,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:26:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:26:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:26:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:26:24,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2021-01-06 17:26:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:24,263 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:26:24,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:26:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:26:24,264 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:24,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:24,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:24,478 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-01-06 17:26:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:24,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988822543] [2021-01-06 17:26:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:24,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:24,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525773792] [2021-01-06 17:26:24,505 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 17:26:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:24,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:24,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:24,675 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 17:26:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988822543] [2021-01-06 17:26:24,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525773792] [2021-01-06 17:26:24,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:24,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144816851] [2021-01-06 17:26:24,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:24,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:24,679 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-06 17:26:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:24,893 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-01-06 17:26:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:26:24,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:26:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:24,895 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:26:24,895 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:26:24,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:26:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 17:26:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:26:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:26:24,909 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2021-01-06 17:26:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:24,909 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:26:24,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:26:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:26:24,910 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:24,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:25,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:25,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2021-01-06 17:26:25,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:25,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542250092] [2021-01-06 17:26:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:25,128 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958310282] [2021-01-06 17:26:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542250092] [2021-01-06 17:26:25,206 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958310282] [2021-01-06 17:26:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489300018] [2021-01-06 17:26:25,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:26:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:26:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:26:25,209 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2021-01-06 17:26:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:25,234 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 17:26:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:26:25,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 17:26:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:25,236 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:26:25,236 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:26:25,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:26:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:26:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 17:26:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:26:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 17:26:25,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-01-06 17:26:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:25,242 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 17:26:25,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:26:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 17:26:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:26:25,243 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:25,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:25,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:26:25,454 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2021-01-06 17:26:25,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:25,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648815958] [2021-01-06 17:26:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:25,470 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:25,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401290909] [2021-01-06 17:26:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:26:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648815958] [2021-01-06 17:26:25,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:25,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401290909] [2021-01-06 17:26:25,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:25,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:26:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162071560] [2021-01-06 17:26:25,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:26:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:26:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:26:25,806 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2021-01-06 17:26:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:26,011 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-01-06 17:26:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:26:26,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 17:26:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:26,013 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:26:26,013 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:26:26,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:26:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:26:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-01-06 17:26:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:26:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 17:26:26,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2021-01-06 17:26:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:26,020 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 17:26:26,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:26:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 17:26:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:26:26,021 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:26,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:26,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:26,237 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:26,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2021-01-06 17:26:26,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:26,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573144865] [2021-01-06 17:26:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:26,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:26,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803103478] [2021-01-06 17:26:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:26:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573144865] [2021-01-06 17:26:26,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803103478] [2021-01-06 17:26:26,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:26,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:26,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173056544] [2021-01-06 17:26:26,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:26,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:26,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:26,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:26,351 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-01-06 17:26:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:26,410 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 17:26:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:26:26,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 17:26:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:26,412 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:26:26,412 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:26:26,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:26:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:26:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:26:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 17:26:26,424 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2021-01-06 17:26:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:26,424 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 17:26:26,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 17:26:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:26:26,428 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:26,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:26,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:26,636 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2021-01-06 17:26:26,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:26,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899612582] [2021-01-06 17:26:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:26,662 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:26,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315163802] [2021-01-06 17:26:26,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:26,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:26,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:26,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:26:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:26,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899612582] [2021-01-06 17:26:26,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:26,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315163802] [2021-01-06 17:26:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:26:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066552272] [2021-01-06 17:26:26,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:26:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:26:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:26:26,999 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2021-01-06 17:26:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:27,235 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-01-06 17:26:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:27,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 17:26:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:27,237 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:26:27,237 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:26:27,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:26:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:26:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-01-06 17:26:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:26:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:26:27,244 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2021-01-06 17:26:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:27,244 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:26:27,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:26:27,244 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:26:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:27,245 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:27,245 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:27,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:26:27,448 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:27,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2021-01-06 17:26:27,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:27,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181376674] [2021-01-06 17:26:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:27,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:27,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109201196] [2021-01-06 17:26:27,467 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:27,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:27,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:26:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:27,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181376674] [2021-01-06 17:26:27,605 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:27,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109201196] [2021-01-06 17:26:27,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:27,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:27,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521515007] [2021-01-06 17:26:27,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:26:27,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:26:27,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:27,607 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2021-01-06 17:26:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:27,674 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-01-06 17:26:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:26:27,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:26:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:27,676 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:26:27,676 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:26:27,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:26:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:26:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 17:26:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 17:26:27,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2021-01-06 17:26:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:27,683 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 17:26:27,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:26:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 17:26:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:27,684 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:27,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:27,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:27,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2021-01-06 17:26:27,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:27,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807295576] [2021-01-06 17:26:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:27,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:27,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565675952] [2021-01-06 17:26:27,915 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:26:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:28,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807295576] [2021-01-06 17:26:28,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:28,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565675952] [2021-01-06 17:26:28,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:28,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:28,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483348827] [2021-01-06 17:26:28,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:28,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:28,190 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2021-01-06 17:26:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:28,264 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-01-06 17:26:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:28,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-01-06 17:26:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:28,268 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:26:28,269 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:26:28,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:26:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:26:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-01-06 17:26:28,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2021-01-06 17:26:28,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:28,284 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-01-06 17:26:28,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-01-06 17:26:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:26:28,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:28,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:28,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:28,501 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:28,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:28,503 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2021-01-06 17:26:28,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:28,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839500358] [2021-01-06 17:26:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:28,518 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:28,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031448830] [2021-01-06 17:26:28,519 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:26:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:26:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:29,010 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2021-01-06 17:26:29,324 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:29,674 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:30,669 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:31,870 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:33,900 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:35,844 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:26:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839500358] [2021-01-06 17:26:36,472 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:36,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031448830] [2021-01-06 17:26:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:26:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54230000] [2021-01-06 17:26:36,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:26:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:26:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:36,475 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2021-01-06 17:26:36,949 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-01-06 17:26:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:37,157 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:26:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:26:37,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 17:26:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:37,158 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:26:37,159 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:26:37,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:26:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-01-06 17:26:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:26:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-01-06 17:26:37,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2021-01-06 17:26:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:37,166 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-01-06 17:26:37,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:26:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-01-06 17:26:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:37,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:37,167 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:37,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:26:37,380 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2021-01-06 17:26:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:37,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818067373] [2021-01-06 17:26:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:37,398 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:37,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379359814] [2021-01-06 17:26:37,398 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:37,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:26:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:37,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:26:37,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:26:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818067373] [2021-01-06 17:26:37,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379359814] [2021-01-06 17:26:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:37,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752732149] [2021-01-06 17:26:37,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:37,500 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2021-01-06 17:26:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:37,537 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-01-06 17:26:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:37,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-01-06 17:26:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:37,539 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:26:37,539 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:26:37,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:26:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-01-06 17:26:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:26:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-01-06 17:26:37,545 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2021-01-06 17:26:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:37,545 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-01-06 17:26:37,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-01-06 17:26:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:37,546 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:37,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:37,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:26:37,761 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2021-01-06 17:26:37,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:37,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056104379] [2021-01-06 17:26:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:37,774 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:37,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93913872] [2021-01-06 17:26:37,775 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:37,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:37,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:26:37,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:38,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:26:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:38,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056104379] [2021-01-06 17:26:38,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93913872] [2021-01-06 17:26:38,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:38,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:26:38,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758398002] [2021-01-06 17:26:38,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:26:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:26:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:38,204 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2021-01-06 17:26:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:38,607 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-01-06 17:26:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:38,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:26:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:38,609 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:26:38,609 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:26:38,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:26:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:26:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-01-06 17:26:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:26:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:26:38,623 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:26:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:38,623 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:26:38,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:26:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:26:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:38,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:38,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:26:38,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:26:38,839 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1793535410, now seen corresponding path program 4 times [2021-01-06 17:26:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:38,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22102678] [2021-01-06 17:26:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:38,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:38,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95304141] [2021-01-06 17:26:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:39,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:26:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:26:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:39,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22102678] [2021-01-06 17:26:39,496 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:39,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95304141] [2021-01-06 17:26:39,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:39,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:26:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26447354] [2021-01-06 17:26:39,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:26:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:26:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:39,498 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2021-01-06 17:26:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:39,883 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-01-06 17:26:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:39,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:26:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:39,885 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:26:39,885 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:26:39,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:26:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:26:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-01-06 17:26:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:26:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:26:39,891 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:26:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:39,892 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:26:39,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:26:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:26:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:26:39,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:39,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:40,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:40,094 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1780420744, now seen corresponding path program 1 times [2021-01-06 17:26:40,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:40,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254705884] [2021-01-06 17:26:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:40,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:40,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878269113] [2021-01-06 17:26:40,109 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:40,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:26:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:26:40,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254705884] [2021-01-06 17:26:40,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:40,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878269113] [2021-01-06 17:26:40,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:40,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:26:40,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029054324] [2021-01-06 17:26:40,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:26:40,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:26:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:40,233 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2021-01-06 17:26:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:40,292 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 17:26:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:40,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 17:26:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:40,293 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:26:40,293 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:26:40,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:26:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 17:26:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:26:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-01-06 17:26:40,299 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2021-01-06 17:26:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:40,300 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-01-06 17:26:40,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:26:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-01-06 17:26:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:26:40,301 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:40,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:40,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:26:40,516 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:40,516 INFO L82 PathProgramCache]: Analyzing trace with hash 848950570, now seen corresponding path program 3 times [2021-01-06 17:26:40,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:40,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989549420] [2021-01-06 17:26:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:40,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:40,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216265190] [2021-01-06 17:26:40,541 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true