/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:42:13,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:42:13,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:42:13,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:42:13,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:42:13,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:42:13,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:42:13,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:42:13,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:42:13,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:42:13,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:42:13,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:42:13,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:42:13,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:42:13,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:42:13,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:42:13,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:42:13,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:42:13,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:42:13,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:42:13,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:42:13,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:42:13,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:42:13,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:42:13,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:42:14,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:42:14,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:42:14,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:42:14,005 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 17:42:14,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:42:14,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:42:14,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:42:14,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:42:14,038 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:42:14,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:42:14,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:42:14,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:42:14,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:42:14,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:42:14,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:42:14,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:42:14,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:42:14,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:42:14,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:42:14,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:42:14,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:42:14,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:42:14,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:42:14,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:42:14,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:42:14,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:42:14,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:42:14,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:42:14,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:42:14,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:42:14,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:42:14,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:42:14,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:42:14,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:42:14,583 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:42:14,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-01-06 17:42:14,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328f54ae5/f2412c73e2a0472c82a2f85d6b149644/FLAG48b0d143f [2021-01-06 17:42:15,452 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:42:15,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-01-06 17:42:15,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328f54ae5/f2412c73e2a0472c82a2f85d6b149644/FLAG48b0d143f [2021-01-06 17:42:15,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328f54ae5/f2412c73e2a0472c82a2f85d6b149644 [2021-01-06 17:42:15,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:42:15,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:42:15,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:42:15,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:42:15,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:42:15,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:42:15" (1/1) ... [2021-01-06 17:42:15,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@759ea46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:15, skipping insertion in model container [2021-01-06 17:42:15,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:42:15" (1/1) ... [2021-01-06 17:42:15,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:42:15,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:42:16,000 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_valuebound50.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 17:42:16,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:42:16,028 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:42:16,042 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_valuebound50.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 17:42:16,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:42:16,066 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:42:16,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16 WrapperNode [2021-01-06 17:42:16,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:42:16,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:42:16,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:42:16,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:42:16,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:42:16,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:42:16,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:42:16,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:42:16,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (1/1) ... [2021-01-06 17:42:16,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:42:16,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:42:16,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:42:16,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:42:16,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (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 17:42:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:42:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:42:16,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:42:16,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:42:16,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:42:16,607 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:42:16,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:42:16 BoogieIcfgContainer [2021-01-06 17:42:16,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:42:16,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:42:16,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:42:16,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:42:16,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:42:15" (1/3) ... [2021-01-06 17:42:16,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e95d0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:42:16, skipping insertion in model container [2021-01-06 17:42:16,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:42:16" (2/3) ... [2021-01-06 17:42:16,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e95d0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:42:16, skipping insertion in model container [2021-01-06 17:42:16,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:42:16" (3/3) ... [2021-01-06 17:42:16,634 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound50.c [2021-01-06 17:42:16,647 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:42:16,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:42:16,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:42:16,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:42:16,742 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:42:16,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:42:16,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:42:16,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:42:16,743 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:42:16,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:42:16,743 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:42:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-01-06 17:42:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:42:16,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:42:16,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:42:16,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:42:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:42:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 17:42:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:42:16,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494862025] [2021-01-06 17:42:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:42:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:42:16,979 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 17:42:16,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494862025] [2021-01-06 17:42:16,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:42:16,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:42:16,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273352517] [2021-01-06 17:42:16,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:42:16,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:42:17,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:42:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:42:17,009 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2021-01-06 17:42:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:42:17,032 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-01-06 17:42:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:42:17,034 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 17:42:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:42:17,045 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:42:17,045 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:42:17,049 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 17:42:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:42:17,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 17:42:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:42:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 17:42:17,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2021-01-06 17:42:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:42:17,093 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 17:42:17,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:42:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 17:42:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:42:17,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:42:17,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:42:17,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:42:17,095 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:42:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:42:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 17:42:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:42:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201758452] [2021-01-06 17:42:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:42:17,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:42:17,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417387602] [2021-01-06 17:42:17,174 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 17:42:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:42:17,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:42:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:42:17,491 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 17:42:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201758452] [2021-01-06 17:42:17,492 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:42:17,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417387602] [2021-01-06 17:42:17,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:42:17,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:42:17,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197217585] [2021-01-06 17:42:17,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:42:17,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:42:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:42:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:42:17,496 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2021-01-06 17:42:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:42:17,612 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-01-06 17:42:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:42:17,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:42:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:42:17,613 INFO L225 Difference]: With dead ends: 25 [2021-01-06 17:42:17,614 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:42:17,615 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 17:42:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:42:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 17:42:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:42:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 17:42:17,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2021-01-06 17:42:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:42:17,621 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 17:42:17,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:42:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 17:42:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:42:17,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:42:17,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:42:17,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:42:17,836 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:42:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:42:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2021-01-06 17:42:17,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:42:17,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436678532] [2021-01-06 17:42:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:42:17,871 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:42:17,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527469848] [2021-01-06 17:42:17,872 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 17:42:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:42:17,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:42:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:42:18,028 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 17:42:18,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436678532] [2021-01-06 17:42:18,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:42:18,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527469848] [2021-01-06 17:42:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:42:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:42:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440024752] [2021-01-06 17:42:18,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:42:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:42:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:42:18,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:42:18,032 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2021-01-06 17:42:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:42:18,224 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 17:42:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:42:18,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 17:42:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:42:18,226 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:42:18,226 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:42:18,227 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 17:42:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:42:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 17:42:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:42:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 17:42:18,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2021-01-06 17:42:18,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:42:18,234 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 17:42:18,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:42:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 17:42:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:42:18,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:42:18,235 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:42:18,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:42:18,450 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:42:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:42:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2021-01-06 17:42:18,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:42:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034685537] [2021-01-06 17:42:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:42:18,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:42:18,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191868150] [2021-01-06 17:42:18,484 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 17:42:18,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:42:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:42:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:42:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:42:26,305 WARN L197 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2021-01-06 17:42:26,385 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 17:42:26,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034685537] [2021-01-06 17:42:26,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:42:26,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191868150] [2021-01-06 17:42:26,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:42:26,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:42:26,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464375948] [2021-01-06 17:42:26,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:42:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:42:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:42:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:42:26,390 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2021-01-06 17:42:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:42:29,596 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 17:42:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:42:29,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:42:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:42:29,598 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:42:29,598 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:42:29,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:42:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:42:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 17:42:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:42:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 17:42:29,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2021-01-06 17:42:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:42:29,607 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 17:42:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:42:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 17:42:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:42:29,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:42:29,608 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:42:29,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:42:29,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:42:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:42:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2021-01-06 17:42:29,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:42:29,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703115151] [2021-01-06 17:42:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:42:29,843 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:42:29,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495625232] [2021-01-06 17:42:29,844 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 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 17:42:46,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:42:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:42:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:42:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:42:47,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:42:47,453 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-06 17:42:47,879 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 17:43:04,773 WARN L197 SmtUtils]: Spent 16.83 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-01-06 17:43:15,707 WARN L197 SmtUtils]: Spent 8.56 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-06 17:43:15,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:43:15,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:43:15,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:43:15,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:43:15,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:43:15,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:43:15,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:43:15,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 17:43:35,037 WARN L197 SmtUtils]: Spent 10.46 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 17:43:41,113 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) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 50) (= (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 17:43:43,122 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) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 50) (= (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 17:43:43,127 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 17:43:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703115151] [2021-01-06 17:43:43,128 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:43:43,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495625232] [2021-01-06 17:43:43,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:43:43,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:43:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764145436] [2021-01-06 17:43:43,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:43:43,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:43:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:43:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=5, NotChecked=18, Total=132 [2021-01-06 17:43:43,132 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2021-01-06 17:43:47,474 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-01-06 17:44:57,190 WARN L197 SmtUtils]: Spent 1.13 m on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-01-06 17:46:07,807 WARN L197 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 17:46:33,072 WARN L197 SmtUtils]: Spent 20.32 s on a formula simplification. DAG size of input: 52 DAG size of output: 29