/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/ps5-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:45:07,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:45:07,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:45:07,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:45:07,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:45:07,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:45:07,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:45:07,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:45:07,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:45:08,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:45:08,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:45:08,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:45:08,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:45:08,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:45:08,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:45:08,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:45:08,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:45:08,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:45:08,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:45:08,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:45:08,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:45:08,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:45:08,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:45:08,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:45:08,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:45:08,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:45:08,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:45:08,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:45:08,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:45:08,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:45:08,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:45:08,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:45:08,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:45:08,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:45:08,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:45:08,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:45:08,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:45:08,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:45:08,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:45:08,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:45:08,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:45:08,085 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:45:08,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:45:08,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:45:08,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:45:08,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:45:08,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:45:08,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:45:08,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:45:08,087 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:45:08,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:45:08,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:45:08,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:45:08,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:45:08,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:45:08,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:45:08,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:45:08,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:45:08,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:45:08,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:45:08,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:45:08,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:45:08,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:45:08,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:45:08,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:45:08,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:45:08,532 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:45:08,533 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:45:08,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2020-12-22 05:45:08,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64eb1beee/08a195f75593498f9a91db53470745af/FLAG66c4939c4 [2020-12-22 05:45:09,242 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:45:09,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2020-12-22 05:45:09,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64eb1beee/08a195f75593498f9a91db53470745af/FLAG66c4939c4 [2020-12-22 05:45:09,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64eb1beee/08a195f75593498f9a91db53470745af [2020-12-22 05:45:09,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:45:09,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:45:09,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:45:09,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:45:09,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:45:09,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5796ebaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09, skipping insertion in model container [2020-12-22 05:45:09,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:45:09,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:45:09,467 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/ps5-ll_unwindbound50.c[458,471] [2020-12-22 05:45:09,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:45:09,516 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:45:09,535 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/ps5-ll_unwindbound50.c[458,471] [2020-12-22 05:45:09,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:45:09,585 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:45:09,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09 WrapperNode [2020-12-22 05:45:09,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:45:09,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:45:09,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:45:09,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:45:09,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:45:09,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:45:09,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:45:09,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:45:09,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (1/1) ... [2020-12-22 05:45:09,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:45:09,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:45:09,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:45:09,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:45:09,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (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 05:45:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:45:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:45:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:45:09,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:45:10,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:45:10,319 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:45:10,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:45:10 BoogieIcfgContainer [2020-12-22 05:45:10,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:45:10,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:45:10,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:45:10,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:45:10,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:45:09" (1/3) ... [2020-12-22 05:45:10,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d1607c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:45:10, skipping insertion in model container [2020-12-22 05:45:10,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:09" (2/3) ... [2020-12-22 05:45:10,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d1607c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:45:10, skipping insertion in model container [2020-12-22 05:45:10,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:45:10" (3/3) ... [2020-12-22 05:45:10,362 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c [2020-12-22 05:45:10,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:45:10,375 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:45:10,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:45:10,446 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:45:10,447 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:45:10,447 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:45:10,447 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:45:10,447 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:45:10,447 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:45:10,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:45:10,448 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:45:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 05:45:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:45:10,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:10,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:10,472 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:10,480 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-22 05:45:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:10,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781110972] [2020-12-22 05:45:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:10,750 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 05:45:10,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781110972] [2020-12-22 05:45:10,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:45:10,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:45:10,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078702500] [2020-12-22 05:45:10,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:45:10,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:45:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:45:10,791 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-22 05:45:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:10,820 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-22 05:45:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:45:10,822 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:45:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:10,849 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:45:10,850 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:45:10,859 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 [2020-12-22 05:45:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:45:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:45:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:45:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 05:45:10,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-22 05:45:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:10,909 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 05:45:10,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:45:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 05:45:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:45:10,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:10,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:10,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:45:10,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:45:10,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:10,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092434532] [2020-12-22 05:45:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:10,961 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:10,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615558201] [2020-12-22 05:45:10,962 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 05:45:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:45:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:11,282 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 05:45:11,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092434532] [2020-12-22 05:45:11,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615558201] [2020-12-22 05:45:11,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:45:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:45:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907110133] [2020-12-22 05:45:11,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:45:11,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:45:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:45:11,290 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-22 05:45:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:11,412 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-22 05:45:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:45:11,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 05:45:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:11,414 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:45:11,414 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 05:45:11,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 05:45:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 05:45:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:45:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:45:11,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-22 05:45:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:11,423 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:45:11,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:45:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:45:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:45:11,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:11,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:11,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:45:11,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-22 05:45:11,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:11,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711549975] [2020-12-22 05:45:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:11,654 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:11,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096083993] [2020-12-22 05:45:11,655 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 05:45:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:45:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:11,845 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 05:45:11,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711549975] [2020-12-22 05:45:11,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:11,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096083993] [2020-12-22 05:45:11,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:11,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:45:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226188233] [2020-12-22 05:45:11,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:45:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:45:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:45:11,850 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-22 05:45:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:12,060 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-22 05:45:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:45:12,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:45:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:12,062 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:45:12,062 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:45:12,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:45:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:45:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-22 05:45:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:45:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 05:45:12,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-22 05:45:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:12,073 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 05:45:12,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:45:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 05:45:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:45:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:12,074 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:12,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:12,278 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-22 05:45:12,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:12,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971246782] [2020-12-22 05:45:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:12,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:12,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820084212] [2020-12-22 05:45:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:45:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:12,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:45:12,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971246782] [2020-12-22 05:45:12,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:12,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820084212] [2020-12-22 05:45:12,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:12,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:45:12,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147310948] [2020-12-22 05:45:12,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:45:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:45:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:45:12,483 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-22 05:45:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:12,516 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 05:45:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:45:12,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:45:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:12,517 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:45:12,517 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:45:12,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:45:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:45:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:45:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:45:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 05:45:12,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-22 05:45:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:12,526 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 05:45:12,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:45:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 05:45:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:45:12,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:12,527 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:12,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:12,742 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-22 05:45:12,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:12,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881616231] [2020-12-22 05:45:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:12,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101861109] [2020-12-22 05:45:12,759 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 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 05:45:12,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:45:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:45:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:45:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:13,072 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 05:45:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881616231] [2020-12-22 05:45:13,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101861109] [2020-12-22 05:45:13,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:13,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:45:13,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651750673] [2020-12-22 05:45:13,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:45:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:45:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:13,076 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-22 05:45:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:13,224 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-22 05:45:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:45:13,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 05:45:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:13,226 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:45:13,226 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 05:45:13,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 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 05:45:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 05:45:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-22 05:45:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:45:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-22 05:45:13,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-22 05:45:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:13,235 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-22 05:45:13,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:45:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-22 05:45:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:45:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:13,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:13,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:13,444 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-22 05:45:13,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:13,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809335529] [2020-12-22 05:45:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:13,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:13,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697050075] [2020-12-22 05:45:13,460 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 05:45:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:45:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:13,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:45:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:13,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809335529] [2020-12-22 05:45:13,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:13,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697050075] [2020-12-22 05:45:13,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:13,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:45:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039213828] [2020-12-22 05:45:13,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:45:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:45:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:13,688 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-22 05:45:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:14,009 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-22 05:45:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:45:14,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:45:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:14,012 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:45:14,012 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:45:14,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:45:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:45:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:45:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:45:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 05:45:14,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-22 05:45:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:14,023 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 05:45:14,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:45:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 05:45:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:45:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:14,025 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:14,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:45:14,237 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-22 05:45:14,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:14,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8644149] [2020-12-22 05:45:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:14,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:14,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730121213] [2020-12-22 05:45:14,252 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 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 05:45:14,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:45:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:45:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:45:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:14,401 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 05:45:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8644149] [2020-12-22 05:45:14,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730121213] [2020-12-22 05:45:14,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:14,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:45:14,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574813411] [2020-12-22 05:45:14,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:45:14,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:14,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:45:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:45:14,405 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-22 05:45:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:14,464 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 05:45:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:45:14,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 05:45:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:14,470 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:45:14,470 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:45:14,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:45:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:45:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:45:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 05:45:14,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-22 05:45:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:14,491 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 05:45:14,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:45:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 05:45:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:45:14,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:14,493 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:14,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:14,702 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:14,703 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-22 05:45:14,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:14,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291931247] [2020-12-22 05:45:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:14,715 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:14,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939737637] [2020-12-22 05:45:14,716 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 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