/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/geo2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:41:07,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:41:07,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:41:08,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:41:08,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:41:08,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:41:08,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:41:08,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:41:08,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:41:08,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:41:08,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:41:08,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:41:08,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:41:08,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:41:08,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:41:08,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:41:08,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:41:08,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:41:08,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:41:08,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:41:08,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:41:08,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:41:08,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:41:08,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:41:08,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:41:08,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:41:08,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:41:08,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:41:08,104 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 17:41:08,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:41:08,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:41:08,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:41:08,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:41:08,154 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:41:08,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:41:08,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:41:08,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:41:08,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:41:08,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:41:08,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:41:08,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:41:08,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:41:08,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:41:08,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:41:08,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:41:08,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:41:08,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:41:08,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:41:08,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:41:08,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:41:08,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:41:08,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:41:08,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:41:08,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:41:08,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:41:08,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:41:08,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:41:08,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:41:08,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:41:08,582 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:41:08,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-01-06 17:41:08,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e9bd39e5/d4f3c1efac9f40769c2d095b5ff28485/FLAG39f074067 [2021-01-06 17:41:09,236 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:41:09,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-01-06 17:41:09,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e9bd39e5/d4f3c1efac9f40769c2d095b5ff28485/FLAG39f074067 [2021-01-06 17:41:09,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4e9bd39e5/d4f3c1efac9f40769c2d095b5ff28485 [2021-01-06 17:41:09,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:41:09,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:41:09,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:41:09,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:41:09,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:41:09,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b7b7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09, skipping insertion in model container [2021-01-06 17:41:09,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:41:09,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:41:09,768 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/geo2-ll_valuebound100.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:41:09,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:41:09,798 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:41:09,815 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/geo2-ll_valuebound100.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:41:09,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:41:09,861 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:41:09,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09 WrapperNode [2021-01-06 17:41:09,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:41:09,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:41:09,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:41:09,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:41:09,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:41:09,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:41:09,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:41:09,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:41:09,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (1/1) ... [2021-01-06 17:41:09,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:41:09,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:41:09,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:41:09,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:41:09,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (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 17:41:10,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:41:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:41:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:41:10,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:41:10,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:41:10,569 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:41:10,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:41:10 BoogieIcfgContainer [2021-01-06 17:41:10,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:41:10,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:41:10,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:41:10,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:41:10,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:41:09" (1/3) ... [2021-01-06 17:41:10,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4c7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:41:10, skipping insertion in model container [2021-01-06 17:41:10,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:41:09" (2/3) ... [2021-01-06 17:41:10,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec4c7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:41:10, skipping insertion in model container [2021-01-06 17:41:10,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:41:10" (3/3) ... [2021-01-06 17:41:10,589 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound100.c [2021-01-06 17:41:10,597 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:41:10,603 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:41:10,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:41:10,701 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:41:10,701 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:41:10,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:41:10,702 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:41:10,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:41:10,702 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:41:10,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:41:10,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:41:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 17:41:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:41:10,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:10,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:10,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:10,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:10,739 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 17:41:10,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:10,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674203304] [2021-01-06 17:41:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:41:10,905 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 17:41:10,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674203304] [2021-01-06 17:41:10,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:41:10,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:41:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237648294] [2021-01-06 17:41:10,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:41:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:41:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:41:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:41:10,931 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 17:41:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:41:10,950 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-01-06 17:41:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:41:10,951 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 17:41:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:41:10,960 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:41:10,961 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:41:10,964 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 17:41:10,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:41:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 17:41:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:41:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 17:41:10,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2021-01-06 17:41:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:41:10,999 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 17:41:10,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:41:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 17:41:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:41:11,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:11,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:11,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:41:11,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 17:41:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:11,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704100663] [2021-01-06 17:41:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:11,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:41:11,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382441721] [2021-01-06 17:41:11,023 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 17:41:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:41:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:41:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:41:11,310 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 17:41:11,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704100663] [2021-01-06 17:41:11,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:41:11,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382441721] [2021-01-06 17:41:11,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:41:11,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:41:11,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279505370] [2021-01-06 17:41:11,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:41:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:41:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:41:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:41:11,315 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2021-01-06 17:41:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:41:11,457 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-01-06 17:41:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:41:11,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:41:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:41:11,459 INFO L225 Difference]: With dead ends: 25 [2021-01-06 17:41:11,459 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:41:11,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:41:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:41:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 17:41:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:41:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 17:41:11,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2021-01-06 17:41:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:41:11,466 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 17:41:11,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:41:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 17:41:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:41:11,467 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:11,467 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:11,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:41:11,681 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2021-01-06 17:41:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:11,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101536808] [2021-01-06 17:41:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:11,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:41:11,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287519788] [2021-01-06 17:41:11,709 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 17:41:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:41:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:41:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:41:11,942 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 17:41:11,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101536808] [2021-01-06 17:41:11,943 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:41:11,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287519788] [2021-01-06 17:41:11,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:41:11,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:41:11,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208389556] [2021-01-06 17:41:11,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:41:11,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:41:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:41:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:41:11,946 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2021-01-06 17:41:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:41:12,253 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 17:41:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:41:12,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 17:41:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:41:12,255 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:41:12,256 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:41:12,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:41:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:41:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 17:41:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:41:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 17:41:12,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2021-01-06 17:41:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:41:12,267 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 17:41:12,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:41:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 17:41:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:41:12,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:12,268 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:12,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:41:12,482 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2021-01-06 17:41:12,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:12,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808376536] [2021-01-06 17:41:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:12,501 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:41:12,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354852439] [2021-01-06 17:41:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:41:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:41:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:41:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:41:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:41:22,489 WARN L197 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2021-01-06 17:41:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:41:22,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808376536] [2021-01-06 17:41:22,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:41:22,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354852439] [2021-01-06 17:41:22,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:41:22,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:41:22,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076803363] [2021-01-06 17:41:22,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:41:22,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:41:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:41:22,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:41:22,584 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2021-01-06 17:41:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:41:26,129 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 17:41:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:41:26,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:41:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:41:26,131 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:41:26,131 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:41:26,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:41:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:41:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-01-06 17:41:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:41:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 17:41:26,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 15 [2021-01-06 17:41:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:41:26,138 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 17:41:26,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:41:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 17:41:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:41:26,139 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:26,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:26,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:41:26,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:26,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1905015351, now seen corresponding path program 1 times [2021-01-06 17:41:26,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:26,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916571169] [2021-01-06 17:41:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:26,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:41:26,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200973950] [2021-01-06 17:41:26,369 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 17:41:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:41:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:41:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:41:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:41:26,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916571169] [2021-01-06 17:41:26,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:41:26,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200973950] [2021-01-06 17:41:26,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:41:26,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:41:26,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554412128] [2021-01-06 17:41:26,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:41:26,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:41:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:41:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:41:26,505 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 5 states. [2021-01-06 17:41:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:41:30,675 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-01-06 17:41:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:41:30,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 17:41:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:41:30,677 INFO L225 Difference]: With dead ends: 23 [2021-01-06 17:41:30,677 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:41:30,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:41:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:41:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 17:41:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:41:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 17:41:30,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2021-01-06 17:41:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:41:30,684 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 17:41:30,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:41:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 17:41:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:41:30,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:41:30,685 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:41:30,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:41:30,900 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:41:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:41:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2021-01-06 17:41:30,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:41:30,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844986831] [2021-01-06 17:41:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:41:30,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:41:30,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277557668] [2021-01-06 17:41:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:44:04,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:44:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:44:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:44:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:44:06,792 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 17:44:23,163 WARN L197 SmtUtils]: Spent 16.30 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-01-06 17:44:32,757 WARN L197 SmtUtils]: Spent 9.22 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-06 17:44:32,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:44:32,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:44:32,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:44:32,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:44:32,846 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:44:32,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:44:32,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:44:32,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 17:44:52,549 WARN L197 SmtUtils]: Spent 10.66 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 17:44:58,626 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse2 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (and (<= 0 ULTIMATE.start_main_~z~0) (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 100) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (= (+ (* ULTIMATE.start_main_~z~0 .cse2) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1))))))) is different from false [2021-01-06 17:45:00,632 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse2 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (and (<= 0 ULTIMATE.start_main_~z~0) (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 100) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (= (+ (* ULTIMATE.start_main_~z~0 .cse2) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1))))))) is different from true [2021-01-06 17:45:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:45:00,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844986831] [2021-01-06 17:45:00,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:45:00,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277557668] [2021-01-06 17:45:00,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:45:00,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:45:00,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918857913] [2021-01-06 17:45:00,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:45:00,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:45:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:45:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=4, NotChecked=18, Total=132 [2021-01-06 17:45:00,639 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2021-01-06 17:45:05,054 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20