/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:21:27,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:21:27,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:21:27,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:21:27,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:21:27,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:21:27,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:21:27,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:21:27,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:21:27,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:21:27,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:21:27,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:21:27,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:21:27,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:21:27,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:21:27,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:21:27,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:21:27,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:21:27,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:21:27,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:21:27,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:21:27,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:21:27,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:21:27,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:21:27,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:21:27,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:21:27,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:21:27,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:21:27,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:21:27,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:21:27,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:21:27,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:21:27,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:21:27,830 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:21:27,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:21:27,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:21:27,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:21:27,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:21:27,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:21:27,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:21:27,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:21:27,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:21:27,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:21:27,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:21:27,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:21:27,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:21:27,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:21:27,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:21:27,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:21:27,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:21:27,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:21:27,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:21:27,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:21:27,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:21:27,834 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:21:28,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:21:28,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:21:28,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:21:28,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:21:28,269 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:21:28,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c [2020-12-22 05:21:28,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680f68975/c20fae42621b4e49aa6cede2151f6a6c/FLAG41da25078 [2020-12-22 05:21:28,859 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:21:28,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c [2020-12-22 05:21:28,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680f68975/c20fae42621b4e49aa6cede2151f6a6c/FLAG41da25078 [2020-12-22 05:21:29,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680f68975/c20fae42621b4e49aa6cede2151f6a6c [2020-12-22 05:21:29,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:21:29,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:21:29,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:21:29,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:21:29,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:21:29,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19936620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29, skipping insertion in model container [2020-12-22 05:21:29,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:21:29,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:21:29,431 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c[525,538] [2020-12-22 05:21:29,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:21:29,454 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:21:29,468 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c[525,538] [2020-12-22 05:21:29,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:21:29,489 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:21:29,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29 WrapperNode [2020-12-22 05:21:29,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:21:29,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:21:29,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:21:29,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:21:29,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:21:29,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:21:29,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:21:29,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:21:29,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... [2020-12-22 05:21:29,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:21:29,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:21:29,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:21:29,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:21:29,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:21:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:21:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:21:29,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:21:29,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:21:29,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:21:29,961 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 05:21:29,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:21:29 BoogieIcfgContainer [2020-12-22 05:21:29,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:21:29,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:21:29,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:21:29,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:21:29,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:21:29" (1/3) ... [2020-12-22 05:21:29,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49beab52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:21:29, skipping insertion in model container [2020-12-22 05:21:29,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:21:29" (2/3) ... [2020-12-22 05:21:29,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49beab52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:21:29, skipping insertion in model container [2020-12-22 05:21:29,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:21:29" (3/3) ... [2020-12-22 05:21:29,982 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound20.c [2020-12-22 05:21:29,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:21:29,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:21:30,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:21:30,069 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:21:30,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:21:30,070 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:21:30,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:21:30,070 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:21:30,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:21:30,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:21:30,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:21:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 05:21:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:21:30,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:30,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:21:30,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-22 05:21:30,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:30,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096832014] [2020-12-22 05:21:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:30,265 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:30,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997299798] [2020-12-22 05:21:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:21:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 05:21:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:21:30,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096832014] [2020-12-22 05:21:30,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:21:30,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997299798] [2020-12-22 05:21:30,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:21:30,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:21:30,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072680956] [2020-12-22 05:21:30,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:21:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:21:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:21:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:21:30,528 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-22 05:21:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:21:30,591 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-22 05:21:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:21:30,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 05:21:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:21:30,601 INFO L225 Difference]: With dead ends: 44 [2020-12-22 05:21:30,601 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:21:30,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:21:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:21:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-22 05:21:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:21:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 05:21:30,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-22 05:21:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:21:30,643 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 05:21:30,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:21:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 05:21:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:21:30,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:30,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:21:30,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 05:21:30,860 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-22 05:21:30,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:30,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380653414] [2020-12-22 05:21:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:30,884 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:30,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066425658] [2020-12-22 05:21:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:21:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:21:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:21:31,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380653414] [2020-12-22 05:21:31,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:21:31,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066425658] [2020-12-22 05:21:31,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:21:31,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:21:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977044880] [2020-12-22 05:21:31,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:21:31,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:21:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:21:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:21:31,141 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-22 05:21:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:21:31,250 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-22 05:21:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:21:31,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:21:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:21:31,252 INFO L225 Difference]: With dead ends: 29 [2020-12-22 05:21:31,252 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:21:31,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:21:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:21:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 05:21:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:21:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 05:21:31,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-22 05:21:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:21:31,268 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 05:21:31,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:21:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 05:21:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:21:31,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:31,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-22 05:21:31,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:31,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-22 05:21:31,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:31,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650051227] [2020-12-22 05:21:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:31,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:31,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342745742] [2020-12-22 05:21:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:21:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:21:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:21:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:21:31,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650051227] [2020-12-22 05:21:31,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:21:31,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342745742] [2020-12-22 05:21:31,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:21:31,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:21:31,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603085769] [2020-12-22 05:21:31,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:21:31,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:21:31,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:21:31,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:21:31,804 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-22 05:21:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:21:40,164 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-22 05:21:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:21:40,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 05:21:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:21:40,165 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:21:40,165 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:21:40,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:21:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:21:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-22 05:21:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:21:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 05:21:40,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-22 05:21:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:21:40,175 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 05:21:40,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:21:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 05:21:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:21:40,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:40,180 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:21:40,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:40,394 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 1 times [2020-12-22 05:21:40,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:40,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366967426] [2020-12-22 05:21:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:40,415 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:40,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238306271] [2020-12-22 05:21:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:21:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:21:40,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:21:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366967426] [2020-12-22 05:21:40,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:21:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238306271] [2020-12-22 05:21:40,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:21:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:21:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448660265] [2020-12-22 05:21:40,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:21:40,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:21:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:21:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:21:40,535 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-22 05:21:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:21:40,570 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-22 05:21:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:21:40,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 05:21:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:21:40,572 INFO L225 Difference]: With dead ends: 27 [2020-12-22 05:21:40,572 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:21:40,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:21:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:21:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 05:21:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:21:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 05:21:40,577 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-12-22 05:21:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:21:40,577 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 05:21:40,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:21:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 05:21:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:21:40,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:40,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:21:40,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:40,793 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 1 times [2020-12-22 05:21:40,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:40,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059520104] [2020-12-22 05:21:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:40,808 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:40,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683365974] [2020-12-22 05:21:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:21:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:21:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 05:21:40,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059520104] [2020-12-22 05:21:40,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:21:40,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683365974] [2020-12-22 05:21:40,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:21:40,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:21:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304021100] [2020-12-22 05:21:40,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:21:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:21:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:21:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:21:40,979 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-12-22 05:21:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:21:45,075 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 05:21:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:21:45,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 05:21:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:21:45,077 INFO L225 Difference]: With dead ends: 27 [2020-12-22 05:21:45,077 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:21:45,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:21:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:21:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 05:21:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:21:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 05:21:45,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-12-22 05:21:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:21:45,083 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 05:21:45,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:21:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 05:21:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:21:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:21:45,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-22 05:21:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:45,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:21:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:21:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-22 05:21:45,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:21:45,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871388925] [2020-12-22 05:21:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:21:45,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:21:45,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806417815] [2020-12-22 05:21:45,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:21:45,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:21:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:21:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:21:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:21:48,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:21:50,050 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:22:07,312 WARN L197 SmtUtils]: Spent 10.05 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-22 05:22:13,374 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)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .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 [2020-12-22 05:22:15,378 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)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .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 [2020-12-22 05:22:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 05:22:15,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871388925] [2020-12-22 05:22:15,381 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:22:15,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806417815] [2020-12-22 05:22:15,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:22:15,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:22:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849690523] [2020-12-22 05:22:15,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:22:15,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:22:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:22:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=4, NotChecked=8, Total=42 [2020-12-22 05:22:15,383 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-12-22 05:22:24,075 WARN L197 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 12 [2020-12-22 05:22:46,926 WARN L197 SmtUtils]: Spent 12.39 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 05:24:35,962 WARN L197 SmtUtils]: Spent 1.61 m on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 05:25:10,624 WARN L197 SmtUtils]: Spent 30.61 s on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 05:25:58,067 WARN L197 SmtUtils]: Spent 20.78 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 05:26:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:26:02,099 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 05:26:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:26:02,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 05:26:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:26:02,118 INFO L225 Difference]: With dead ends: 23 [2020-12-22 05:26:02,118 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:26:02,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 219.6s TimeCoverageRelationStatistics Valid=41, Invalid=54, Unknown=19, NotChecked=18, Total=132 [2020-12-22 05:26:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:26:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 05:26:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:26:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 05:26:02,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 05:26:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:26:02,134 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 05:26:02,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:26:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 05:26:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:26:02,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:26:02,137 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:26:02,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:26:02,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:26:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:26:02,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 2 times [2020-12-22 05:26:02,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:26:02,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017873898] [2020-12-22 05:26:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:26:02,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:26:02,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513164396] [2020-12-22 05:26:02,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:26:02,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:26:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:26:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:26:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:26:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:26:02,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017873898] [2020-12-22 05:26:02,675 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:26:02,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513164396] [2020-12-22 05:26:02,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:26:02,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:26:02,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928180519] [2020-12-22 05:26:02,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:26:02,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:26:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:26:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:26:02,680 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-12-22 05:26:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:26:02,905 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 05:26:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:26:02,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 05:26:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:26:02,908 INFO L225 Difference]: With dead ends: 28 [2020-12-22 05:26:02,908 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:26:02,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:26:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:26:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:26:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:26:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 05:26:02,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-12-22 05:26:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:26:02,919 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 05:26:02,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:26:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 05:26:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:26:02,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:26:02,920 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 05:26:03,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:26:03,123 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:26:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:26:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 3 times [2020-12-22 05:26:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:26:03,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981413935] [2020-12-22 05:26:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:26:03,139 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:26:03,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810503214] [2020-12-22 05:26:03,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:26:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:26:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:26:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:26:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:26:04,225 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-22 05:26:04,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:26:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 05:26:04,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981413935] [2020-12-22 05:26:04,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:26:04,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810503214] [2020-12-22 05:26:04,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:26:04,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:26:04,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601270172] [2020-12-22 05:26:04,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:26:04,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:26:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:26:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:26:04,791 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states.