/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:40:55,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:40:55,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:40:55,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:40:55,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:40:55,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:40:55,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:40:55,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:40:55,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:40:55,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:40:55,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:40:55,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:40:55,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:40:55,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:40:55,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:40:55,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:40:55,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:40:55,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:40:55,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:40:55,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:40:55,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:40:55,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:40:55,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:40:55,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:40:55,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 05:40:55,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 05:40:55,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 05:40:55,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 05:40:55,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 05:40:55,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 05:40:55,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:40:55,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:40:55,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:40:55,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:40:55,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:40:55,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:40:55,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:40:55,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:40:55,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:40:55,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:40:55,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:40:55,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:40:55,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:40:55,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:40:55,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:40:55,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:40:55,547 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:40:55,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:40:55,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:40:55,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:40:55,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:40:55,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:40:55,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:40:55,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:40:55,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:40:55,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:40:55,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:40:55,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:40:55,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:40:55,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:55,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:40:55,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:40:55,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:40:55,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:40:55,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:40:55,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:40:55,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:40:55,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:40:55,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:40:55,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:40:55,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:40:55,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:40:55,989 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:40:55,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2020-12-22 05:40:56,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06d6d3ae/418460f8ea824a718262e166814e41f9/FLAG619ffbd2c [2020-12-22 05:40:56,646 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:40:56,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2020-12-22 05:40:56,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06d6d3ae/418460f8ea824a718262e166814e41f9/FLAG619ffbd2c [2020-12-22 05:40:57,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06d6d3ae/418460f8ea824a718262e166814e41f9 [2020-12-22 05:40:57,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:40:57,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:40:57,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:57,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:40:57,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:40:57,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fffc602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57, skipping insertion in model container [2020-12-22 05:40:57,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:40:57,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:40:57,310 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_unwindbound1.c[458,471] [2020-12-22 05:40:57,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:57,341 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:40:57,354 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_unwindbound1.c[458,471] [2020-12-22 05:40:57,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:57,379 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:40:57,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57 WrapperNode [2020-12-22 05:40:57,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:57,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:57,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:40:57,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:40:57,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:57,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:40:57,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:40:57,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:40:57,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (1/1) ... [2020-12-22 05:40:57,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:40:57,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:40:57,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:40:57,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:40:57,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (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 05:40:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:40:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:40:57,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:40:57,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:40:57,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:40:57,860 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:40:57,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:57 BoogieIcfgContainer [2020-12-22 05:40:57,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:40:57,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:40:57,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:40:57,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:40:57,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:40:57" (1/3) ... [2020-12-22 05:40:57,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f67151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:57, skipping insertion in model container [2020-12-22 05:40:57,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:57" (2/3) ... [2020-12-22 05:40:57,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f67151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:57, skipping insertion in model container [2020-12-22 05:40:57,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:57" (3/3) ... [2020-12-22 05:40:57,871 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound1.c [2020-12-22 05:40:57,885 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:40:57,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:40:57,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:40:57,972 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:40:57,973 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:40:57,973 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:40:57,973 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:40:57,975 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:40:57,975 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:40:57,975 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:40:57,976 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:40:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 05:40:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:40:58,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:58,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:58,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-22 05:40:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:58,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642768693] [2020-12-22 05:40:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:58,254 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 05:40:58,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642768693] [2020-12-22 05:40:58,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:58,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:40:58,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168680790] [2020-12-22 05:40:58,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:40:58,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:40:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:40:58,286 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-22 05:40:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:58,303 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-22 05:40:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:40:58,304 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:40:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:58,314 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:40:58,314 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:40:58,317 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 05:40:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:40:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:40:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:40:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 05:40:58,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-22 05:40:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:58,354 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 05:40:58,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:40:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 05:40:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:40:58,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:58,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:58,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:40:58,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:40:58,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:58,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958816481] [2020-12-22 05:40:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:58,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:58,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106340062] [2020-12-22 05:40:58,379 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 05:40:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:40:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:58,540 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 05:40:58,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958816481] [2020-12-22 05:40:58,541 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:58,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106340062] [2020-12-22 05:40:58,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:58,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:40:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155866859] [2020-12-22 05:40:58,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:40:58,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:58,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:40:58,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:58,546 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-22 05:40:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:58,647 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-22 05:40:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:40:58,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 05:40:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:58,649 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:40:58,649 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 05:40:58,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 05:40:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 05:40:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:40:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:40:58,657 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-22 05:40:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:58,658 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:40:58,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:40:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:40:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:40:58,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:58,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:58,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:40:58,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-22 05:40:58,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246381974] [2020-12-22 05:40:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:58,893 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:58,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097416067] [2020-12-22 05:40:58,894 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 05:40:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:40:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246381974] [2020-12-22 05:40:59,044 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:59,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097416067] [2020-12-22 05:40:59,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:59,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:40:59,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539948543] [2020-12-22 05:40:59,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:40:59,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:40:59,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:59,048 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-12-22 05:40:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:59,076 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-22 05:40:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:40:59,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 05:40:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:59,078 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:40:59,078 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:40:59,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:40:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:40:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:40:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-12-22 05:40:59,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 12 [2020-12-22 05:40:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:59,084 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-12-22 05:40:59,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:40:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-12-22 05:40:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:59,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:59,086 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:59,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:59,301 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 983954548, now seen corresponding path program 1 times [2020-12-22 05:40:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024711231] [2020-12-22 05:40:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:59,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:59,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195027866] [2020-12-22 05:40:59,319 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 05:40:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:40:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:59,493 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 05:40:59,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024711231] [2020-12-22 05:40:59,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:59,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195027866] [2020-12-22 05:40:59,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:59,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:40:59,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412326339] [2020-12-22 05:40:59,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:40:59,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:40:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:59,501 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand 6 states. [2020-12-22 05:40:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:59,657 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2020-12-22 05:40:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:40:59,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 05:40:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:59,659 INFO L225 Difference]: With dead ends: 18 [2020-12-22 05:40:59,659 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:40:59,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:40:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:40:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:40:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:40:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-12-22 05:40:59,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 13 [2020-12-22 05:40:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:59,670 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-12-22 05:40:59,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:40:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-12-22 05:40:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:40:59,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:59,672 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:59,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:59,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-22 05:40:59,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:59,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146926357] [2020-12-22 05:40:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:59,892 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:59,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955406350] [2020-12-22 05:40:59,893 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 05:40:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:40:59,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:40:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:40:59,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:40:59,990 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:40:59,991 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:41:00,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:41:00,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:41:00 BoogieIcfgContainer [2020-12-22 05:41:00,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:41:00,252 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:41:00,252 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:41:00,252 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:41:00,253 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:57" (3/4) ... [2020-12-22 05:41:00,256 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:41:00,333 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/ps5-ll_unwindbound1.c-witness.graphml [2020-12-22 05:41:00,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:41:00,338 INFO L168 Benchmark]: Toolchain (without parser) took 3290.46 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 114.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,339 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:41:00,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.78 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,341 INFO L168 Benchmark]: Boogie Preprocessor took 28.75 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,342 INFO L168 Benchmark]: RCFGBuilder took 411.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 132.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,343 INFO L168 Benchmark]: TraceAbstraction took 2388.12 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 116.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,344 INFO L168 Benchmark]: Witness Printer took 81.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:41:00,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.78 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.75 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 411.61 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 132.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2388.12 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 116.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. * Witness Printer took 81.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 114.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<1 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND FALSE !(counter++<1) [L10] COND FALSE !(!(cond)) VAL [counter=2] [L10] COND TRUE !(cond) VAL [counter=2] [L12] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 66 SDslu, 51 SDs, 0 SdLazy, 52 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 1445 SizeOfPredicates, 13 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...