/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/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:50:52,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:50:52,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:50:52,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:50:52,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:50:52,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:50:52,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:50:52,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:50:52,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:50:52,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:50:52,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:50:52,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:50:52,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:50:52,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:50:52,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:50:52,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:50:52,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:50:52,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:50:52,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:50:52,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:50:52,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:50:52,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:50:52,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:50:52,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:50:52,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:50:52,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:50:52,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:50:52,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:50:52,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:50:52,814 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:50:52,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:50:52,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:50:52,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:50:52,819 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:50:52,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:50:52,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:50:52,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:50:52,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:50:52,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:50:52,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:50:52,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:50:52,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:50:52,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:50:52,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:50:52,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:50:52,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:50:52,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:50:52,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:50:52,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:50:52,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:50:52,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:50:52,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:50:52,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:50:52,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:50:52,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:50:53,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:50:53,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:50:53,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:50:53,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:50:53,272 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:50:53,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2020-12-22 05:50:53,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117b9bbfc/9b88b301209b447698f0c40f08efa999/FLAG7d6ecac29 [2020-12-22 05:50:54,107 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:50:54,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2020-12-22 05:50:54,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117b9bbfc/9b88b301209b447698f0c40f08efa999/FLAG7d6ecac29 [2020-12-22 05:50:54,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117b9bbfc/9b88b301209b447698f0c40f08efa999 [2020-12-22 05:50:54,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:50:54,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:50:54,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:50:54,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:50:54,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:50:54,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581833ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54, skipping insertion in model container [2020-12-22 05:50:54,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:50:54,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:50:54,656 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/sqrt1-ll_unwindbound5.c[520,533] [2020-12-22 05:50:54,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:50:54,690 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:50:54,702 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/sqrt1-ll_unwindbound5.c[520,533] [2020-12-22 05:50:54,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:50:54,724 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:50:54,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54 WrapperNode [2020-12-22 05:50:54,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:50:54,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:50:54,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:50:54,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:50:54,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:50:54,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:50:54,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:50:54,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:50:54,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (1/1) ... [2020-12-22 05:50:54,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:50:54,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:50:54,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:50:54,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:50:54,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (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 05:50:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:50:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:50:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:50:54,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:50:55,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:50:55,199 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 05:50:55,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:50:55 BoogieIcfgContainer [2020-12-22 05:50:55,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:50:55,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:50:55,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:50:55,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:50:55,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:50:54" (1/3) ... [2020-12-22 05:50:55,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a404db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:50:55, skipping insertion in model container [2020-12-22 05:50:55,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:50:54" (2/3) ... [2020-12-22 05:50:55,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a404db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:50:55, skipping insertion in model container [2020-12-22 05:50:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:50:55" (3/3) ... [2020-12-22 05:50:55,247 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.c [2020-12-22 05:50:55,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:50:55,271 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 05:50:55,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 05:50:55,392 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:50:55,392 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:50:55,392 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:50:55,392 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:50:55,393 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:50:55,393 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:50:55,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:50:55,396 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:50:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-22 05:50:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:50:55,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:55,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:50:55,453 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2020-12-22 05:50:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:55,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374257240] [2020-12-22 05:50:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:55,720 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 05:50:55,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374257240] [2020-12-22 05:50:55,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:50:55,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:50:55,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148387632] [2020-12-22 05:50:55,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:50:55,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:50:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:50:55,758 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-22 05:50:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:55,790 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-12-22 05:50:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:50:55,792 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 05:50:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:55,820 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:50:55,820 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:50:55,827 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 05:50:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:50:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:50:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:50:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 05:50:55,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-12-22 05:50:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:55,879 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 05:50:55,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:50:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 05:50:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:50:55,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:55,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:50:55,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:50:55,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-22 05:50:55,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:55,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536697155] [2020-12-22 05:50:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:56,062 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 05:50:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536697155] [2020-12-22 05:50:56,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:50:56,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:50:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440462857] [2020-12-22 05:50:56,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:50:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:50:56,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:50:56,066 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-12-22 05:50:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:56,215 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-22 05:50:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:50:56,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 05:50:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:56,218 INFO L225 Difference]: With dead ends: 55 [2020-12-22 05:50:56,218 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 05:50:56,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:50:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 05:50:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-12-22 05:50:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:50:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-22 05:50:56,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2020-12-22 05:50:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:56,230 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-22 05:50:56,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:50:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-22 05:50:56,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:50:56,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:56,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:50:56,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:50:56,232 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2020-12-22 05:50:56,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:56,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267037431] [2020-12-22 05:50:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:56,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:56,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371649709] [2020-12-22 05:50:56,250 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 05:50:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:50:56,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:56,419 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 05:50:56,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267037431] [2020-12-22 05:50:56,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:56,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371649709] [2020-12-22 05:50:56,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:50:56,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:50:56,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029770642] [2020-12-22 05:50:56,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:50:56,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:50:56,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:50:56,423 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-12-22 05:50:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:56,518 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-22 05:50:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:50:56,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 05:50:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:56,519 INFO L225 Difference]: With dead ends: 54 [2020-12-22 05:50:56,519 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 05:50:56,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:50:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 05:50:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-22 05:50:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:50:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 05:50:56,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 8 [2020-12-22 05:50:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:56,529 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 05:50:56,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:50:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 05:50:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:50:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:56,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:50:56,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 05:50:56,744 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:56,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1265507748, now seen corresponding path program 1 times [2020-12-22 05:50:56,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:56,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963923611] [2020-12-22 05:50:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:56,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:56,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6163807] [2020-12-22 05:50:56,760 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 05:50:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:56,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:50:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:56,904 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 05:50:56,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963923611] [2020-12-22 05:50:56,905 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6163807] [2020-12-22 05:50:56,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:56,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:50:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797016818] [2020-12-22 05:50:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:50:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:50:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:50:56,908 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2020-12-22 05:50:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:57,013 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-22 05:50:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:50:57,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 05:50:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:57,014 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:50:57,015 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 05:50:57,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:50:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 05:50:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-12-22 05:50:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 05:50:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 05:50:57,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2020-12-22 05:50:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:57,024 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 05:50:57,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:50:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 05:50:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:50:57,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:57,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:50:57,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:57,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2020-12-22 05:50:57,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:57,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946432781] [2020-12-22 05:50:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:57,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689226290] [2020-12-22 05:50:57,255 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 05:50:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:50:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946432781] [2020-12-22 05:50:57,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689226290] [2020-12-22 05:50:57,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:57,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:50:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204187257] [2020-12-22 05:50:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:50:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:50:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:50:57,402 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-12-22 05:50:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:57,517 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-12-22 05:50:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:50:57,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 05:50:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:57,519 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:50:57,519 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 05:50:57,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:50:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 05:50:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-22 05:50:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 05:50:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 05:50:57,527 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 16 [2020-12-22 05:50:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:57,527 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 05:50:57,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:50:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 05:50:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 05:50:57,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:57,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-22 05:50:57,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:57,743 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1785416430, now seen corresponding path program 2 times [2020-12-22 05:50:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894061464] [2020-12-22 05:50:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:57,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:57,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170218573] [2020-12-22 05:50:57,758 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 05:50:57,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:50:57,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:50:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:50:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894061464] [2020-12-22 05:50:57,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170218573] [2020-12-22 05:50:57,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:57,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:50:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373501586] [2020-12-22 05:50:57,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:50:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:50:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:50:57,879 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2020-12-22 05:50:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:57,987 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-22 05:50:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:50:57,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-22 05:50:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:57,988 INFO L225 Difference]: With dead ends: 70 [2020-12-22 05:50:57,988 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 05:50:57,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:50:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 05:50:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-12-22 05:50:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 05:50:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-12-22 05:50:57,997 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 22 [2020-12-22 05:50:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:57,997 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-12-22 05:50:57,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:50:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-12-22 05:50:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 05:50:57,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:57,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-22 05:50:58,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:58,212 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2020-12-22 05:50:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069121613] [2020-12-22 05:50:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:58,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:58,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618795305] [2020-12-22 05:50:58,240 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 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 05:50:58,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:50:58,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:50:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:50:58,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:58,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069121613] [2020-12-22 05:50:58,422 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:58,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618795305] [2020-12-22 05:50:58,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:58,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:50:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913187822] [2020-12-22 05:50:58,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:50:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:50:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:50:58,425 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-12-22 05:50:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:58,565 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-22 05:50:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:50:58,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-22 05:50:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:58,567 INFO L225 Difference]: With dead ends: 67 [2020-12-22 05:50:58,567 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 05:50:58,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:50:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 05:50:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-22 05:50:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 05:50:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-22 05:50:58,575 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2020-12-22 05:50:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:58,575 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-22 05:50:58,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:50:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-22 05:50:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 05:50:58,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:58,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-22 05:50:58,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 05:50:58,788 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 1 times [2020-12-22 05:50:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:58,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894181758] [2020-12-22 05:50:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:58,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:58,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029863188] [2020-12-22 05:50:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:50:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:50:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:50:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:50:58,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894181758] [2020-12-22 05:50:58,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:58,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029863188] [2020-12-22 05:50:58,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:58,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:50:58,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097919485] [2020-12-22 05:50:59,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:50:59,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:59,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:50:59,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:50:59,001 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-12-22 05:50:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:59,140 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-12-22 05:50:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:50:59,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-22 05:50:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:59,141 INFO L225 Difference]: With dead ends: 65 [2020-12-22 05:50:59,141 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 05:50:59,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:50:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 05:50:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-22 05:50:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 05:50:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 05:50:59,148 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 26 [2020-12-22 05:50:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:59,149 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 05:50:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:50:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 05:50:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:50:59,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:59,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-22 05:50:59,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:59,365 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1822162560, now seen corresponding path program 3 times [2020-12-22 05:50:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:59,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391618538] [2020-12-22 05:50:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:59,377 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:59,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721133059] [2020-12-22 05:50:59,378 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 [2020-12-22 05:50:59,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:50:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:50:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:50:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:50:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 05:50:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391618538] [2020-12-22 05:50:59,496 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:50:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721133059] [2020-12-22 05:50:59,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:50:59,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:50:59,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782105629] [2020-12-22 05:50:59,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:50:59,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:50:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:50:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:50:59,498 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 5 states. [2020-12-22 05:50:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:50:59,561 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-22 05:50:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:50:59,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 05:50:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:50:59,562 INFO L225 Difference]: With dead ends: 52 [2020-12-22 05:50:59,562 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 05:50:59,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:50:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 05:50:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 05:50:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 05:50:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 05:50:59,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2020-12-22 05:50:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:50:59,569 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 05:50:59,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:50:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 05:50:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 05:50:59,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:50:59,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-22 05:50:59,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:59,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:50:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:50:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1248592163, now seen corresponding path program 3 times [2020-12-22 05:50:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:50:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156565759] [2020-12-22 05:50:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:50:59,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:50:59,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495712091] [2020-12-22 05:50:59,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:50:59,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:50:59,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:50:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:50:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:51:26,138 WARN L197 SmtUtils]: Spent 26.12 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-22 05:51:40,553 WARN L197 SmtUtils]: Spent 6.50 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 05:51:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 05:51:42,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156565759] [2020-12-22 05:51:42,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:51:42,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495712091] [2020-12-22 05:51:42,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:51:42,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:51:42,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881940440] [2020-12-22 05:51:42,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:51:42,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:51:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:51:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=59, Unknown=3, NotChecked=0, Total=90 [2020-12-22 05:51:42,599 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 10 states. [2020-12-22 05:51:57,225 WARN L197 SmtUtils]: Spent 14.61 s on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-12-22 05:53:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:53:47,759 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 05:53:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:53:47,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-22 05:53:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:53:47,760 INFO L225 Difference]: With dead ends: 53 [2020-12-22 05:53:47,760 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 05:53:47,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 91.2s TimeCoverageRelationStatistics Valid=47, Invalid=79, Unknown=6, NotChecked=0, Total=132 [2020-12-22 05:53:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 05:53:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-22 05:53:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 05:53:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 05:53:47,777 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 32 [2020-12-22 05:53:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:53:47,778 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 05:53:47,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:53:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 05:53:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 05:53:47,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:53:47,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-22 05:53:47,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 05:53:47,982 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:53:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:53:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1601348966, now seen corresponding path program 2 times [2020-12-22 05:53:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:53:47,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485858697] [2020-12-22 05:53:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:53:47,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:53:47,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122307729] [2020-12-22 05:53:47,995 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:53:48,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 05:53:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:53:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 05:53:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:53:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 05:53:48,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485858697] [2020-12-22 05:53:48,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:53:48,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122307729] [2020-12-22 05:53:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:53:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:53:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741479008] [2020-12-22 05:53:48,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:53:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:53:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:53:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:53:48,254 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 7 states. [2020-12-22 05:54:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:54:01,293 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-22 05:54:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:54:01,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-22 05:54:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:54:01,294 INFO L225 Difference]: With dead ends: 44 [2020-12-22 05:54:01,295 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 05:54:01,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:54:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 05:54:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 05:54:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 05:54:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 05:54:01,304 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2020-12-22 05:54:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:54:01,304 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 05:54:01,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:54:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 05:54:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 05:54:01,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:54:01,305 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:54:01,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:54:01,513 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:54:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:54:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash -746038783, now seen corresponding path program 1 times [2020-12-22 05:54:01,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:54:01,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857307008] [2020-12-22 05:54:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:54:01,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:54:01,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175800529] [2020-12-22 05:54:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:54:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:54:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:54:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:54:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:54:01,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857307008] [2020-12-22 05:54:01,703 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:54:01,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175800529] [2020-12-22 05:54:01,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:54:01,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:54:01,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366809500] [2020-12-22 05:54:01,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:54:01,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:54:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:54:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:54:01,709 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 7 states. [2020-12-22 05:54:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:54:01,771 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-22 05:54:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:54:01,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-22 05:54:01,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:54:01,772 INFO L225 Difference]: With dead ends: 52 [2020-12-22 05:54:01,772 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 05:54:01,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:54:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 05:54:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 05:54:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 05:54:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 05:54:01,784 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2020-12-22 05:54:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:54:01,785 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 05:54:01,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:54:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 05:54:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 05:54:01,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:54:01,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:54:01,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:54:01,987 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:54:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:54:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash -977613196, now seen corresponding path program 1 times [2020-12-22 05:54:01,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:54:01,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553040392] [2020-12-22 05:54:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:54:02,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:54:02,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045291563] [2020-12-22 05:54:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:54:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:54:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:54:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:54:02,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553040392] [2020-12-22 05:54:02,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:54:02,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045291563] [2020-12-22 05:54:02,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:54:02,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:54:02,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:54:02,170 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:54:02,170 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:54:02,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:54:02,407 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:54:02,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:54:02 BoogieIcfgContainer [2020-12-22 05:54:02,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:54:02,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:54:02,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:54:02,409 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:54:02,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:50:55" (3/4) ... [2020-12-22 05:54:02,413 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:54:02,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:54:02,417 INFO L168 Benchmark]: Toolchain (without parser) took 187953.66 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.5 MB in the beginning and 72.6 MB in the end (delta: 53.9 MB). Peak memory consumption was 85.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,418 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:54:02,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,422 INFO L168 Benchmark]: Boogie Preprocessor took 25.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 114.0 MB in the end (delta: 998.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,427 INFO L168 Benchmark]: RCFGBuilder took 412.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 133.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,427 INFO L168 Benchmark]: TraceAbstraction took 187178.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.5 MB in the beginning and 72.6 MB in the end (delta: 60.9 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:54:02,428 INFO L168 Benchmark]: Witness Printer took 4.97 ms. Allocated memory is still 181.4 MB. Free memory is still 72.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:54:02,431 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 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.59 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 114.0 MB in the end (delta: 998.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 133.8 MB in the end (delta: -19.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 187178.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.5 MB in the beginning and 72.6 MB in the end (delta: 60.9 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. * Witness Printer took 4.97 ms. Allocated memory is still 181.4 MB. Free memory is still 72.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int counter = 0; [L22] int n; [L23] long long a, s, t; [L24] n = __VERIFIER_nondet_int() [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] EXPR counter++ [L30] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND FALSE !(!(s <= n)) [L39] a = a + 1 [L40] t = t + 2 [L41] s = s + t [L30] EXPR counter++ [L30] COND TRUE counter++<5 [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L36] COND TRUE !(s <= n) [L12] COND FALSE !(!(cond)) [L12] COND FALSE !(!(cond)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 187.0s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 139.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 237 SDtfs, 296 SDslu, 504 SDs, 0 SdLazy, 613 SolverSat, 171 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 89.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 91.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 58 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 43.8s InterpolantComputationTime, 253 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 34521 SizeOfPredicates, 56 NumberOfNonLiveVariables, 951 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 113/209 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...