/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/array-programs/partial_mod_count_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:49,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:49,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:49,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:49,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:49,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:49,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:49,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:49,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:49,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:49,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:49,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:10:49,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:10:49,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:10:49,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:10:49,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:10:49,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:10:49,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:10:49,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:10:49,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:10:49,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:10:49,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:10:49,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:10:49,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:10:49,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:10:49,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:10:49,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:10:49,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:10:49,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:49,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:49,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:49,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:49,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:49,913 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:49,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:49,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:49,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:49,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:49,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:49,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:49,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:49,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:49,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:49,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:49,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:49,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:49,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:49,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:49,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:49,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:49,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:49,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:49,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:49,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:49,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:50,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:50,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:50,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:50,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:50,321 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:50,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2020-12-21 22:10:50,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b774b0242/614daef6dff94e25b7a708579d2bac89/FLAG48a390608 [2020-12-21 22:10:51,093 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:51,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2020-12-21 22:10:51,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b774b0242/614daef6dff94e25b7a708579d2bac89/FLAG48a390608 [2020-12-21 22:10:51,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b774b0242/614daef6dff94e25b7a708579d2bac89 [2020-12-21 22:10:51,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:51,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:51,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:51,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:51,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:51,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f52473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51, skipping insertion in model container [2020-12-21 22:10:51,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:51,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:51,653 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/array-programs/partial_mod_count_4.c[323,336] [2020-12-21 22:10:51,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:51,679 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:51,693 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/array-programs/partial_mod_count_4.c[323,336] [2020-12-21 22:10:51,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:51,718 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:51,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51 WrapperNode [2020-12-21 22:10:51,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:51,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:51,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:51,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:51,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:51,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:51,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:51,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:51,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (1/1) ... [2020-12-21 22:10:51,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:51,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:51,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:51,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:51,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (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 [2020-12-21 22:10:51,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:51,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:51,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:52,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:52,189 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:10:52,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:52 BoogieIcfgContainer [2020-12-21 22:10:52,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:52,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:52,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:52,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:52,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:51" (1/3) ... [2020-12-21 22:10:52,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12905f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:52, skipping insertion in model container [2020-12-21 22:10:52,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:51" (2/3) ... [2020-12-21 22:10:52,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12905f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:52, skipping insertion in model container [2020-12-21 22:10:52,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:52" (3/3) ... [2020-12-21 22:10:52,222 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2020-12-21 22:10:52,243 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:52,250 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:52,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:52,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:52,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:52,321 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:52,321 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:52,321 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:52,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:52,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:52,322 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:10:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:52,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:52,348 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-21 22:10:52,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:52,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182741151] [2020-12-21 22:10:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:52,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182741151] [2020-12-21 22:10:52,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:52,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963947258] [2020-12-21 22:10:52,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:52,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:52,572 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 22:10:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:52,592 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-21 22:10:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:52,594 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:10:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:52,604 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:10:52,604 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:10:52,608 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 [2020-12-21 22:10:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:10:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:10:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:10:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-21 22:10:52,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-21 22:10:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:52,649 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-21 22:10:52,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-21 22:10:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:52,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:52,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:52,651 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-21 22:10:52,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:52,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961610563] [2020-12-21 22:10:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961610563] [2020-12-21 22:10:52,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:52,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948483489] [2020-12-21 22:10:52,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:52,742 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-21 22:10:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:52,845 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-21 22:10:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:52,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-21 22:10:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:52,848 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:10:52,848 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:10:52,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:10:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-21 22:10:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:10:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:10:52,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 22:10:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:52,855 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:10:52,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:10:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:52,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:52,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:52,857 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-21 22:10:52,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:52,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973229971] [2020-12-21 22:10:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973229971] [2020-12-21 22:10:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122418536] [2020-12-21 22:10:52,951 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 [2020-12-21 22:10:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:53,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:53,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:10:53,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085989299] [2020-12-21 22:10:53,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:53,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:53,150 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-21 22:10:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:53,239 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-21 22:10:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:53,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 22:10:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:53,241 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:10:53,241 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:53,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 22:10:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:10:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:10:53,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-21 22:10:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:53,248 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:10:53,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:10:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:10:53,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:53,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:53,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:53,463 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-21 22:10:53,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:53,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812541458] [2020-12-21 22:10:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:53,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812541458] [2020-12-21 22:10:53,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412656205] [2020-12-21 22:10:53,565 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 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 [2020-12-21 22:10:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:10:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:53,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:53,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:10:53,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:10:53,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:53,810 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-21 22:10:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:10:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:53,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-21 22:10:53,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611802342] [2020-12-21 22:10:53,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:10:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:53,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:10:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:53,831 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:10:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:53,934 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:10:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:10:53,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:10:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:53,943 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:10:53,943 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:53,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:10:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:10:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:10:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 22:10:53,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-21 22:10:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:53,951 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 22:10:53,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:10:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 22:10:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:10:53,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:53,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:54,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:54,159 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-21 22:10:54,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:54,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471048231] [2020-12-21 22:10:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:54,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471048231] [2020-12-21 22:10:54,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582718565] [2020-12-21 22:10:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 22:10:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:54,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:54,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:54,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976993821] [2020-12-21 22:10:54,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:54,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:54,409 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-21 22:10:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:54,491 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-21 22:10:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:54,491 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 22:10:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:54,493 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:10:54,493 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:10:54,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:10:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-21 22:10:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:10:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 22:10:54,501 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-21 22:10:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:54,501 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 22:10:54,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 22:10:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:10:54,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:54,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:54,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:54,718 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-21 22:10:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:54,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140745869] [2020-12-21 22:10:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:54,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140745869] [2020-12-21 22:10:54,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426269875] [2020-12-21 22:10:54,805 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 [2020-12-21 22:10:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:54,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:54,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:54,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:54,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:10:54,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053429185] [2020-12-21 22:10:54,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:54,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:54,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:54,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:54,961 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-21 22:10:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:55,056 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-21 22:10:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:10:55,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 22:10:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:55,059 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:10:55,059 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:10:55,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:10:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-21 22:10:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:10:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-21 22:10:55,067 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-21 22:10:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:55,068 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-21 22:10:55,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-21 22:10:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:10:55,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:55,069 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:55,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:55,284 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-21 22:10:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:55,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624451574] [2020-12-21 22:10:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624451574] [2020-12-21 22:10:55,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382374638] [2020-12-21 22:10:55,384 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 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 [2020-12-21 22:10:55,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 22:10:55,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:55,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-21 22:10:55,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169470287] [2020-12-21 22:10:55,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:55,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:55,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:55,533 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-21 22:10:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:55,597 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-21 22:10:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:55,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 22:10:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:55,599 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:10:55,599 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:10:55,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:10:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-21 22:10:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:10:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-21 22:10:55,607 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-21 22:10:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:55,608 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-21 22:10:55,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-21 22:10:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:10:55,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:55,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:10:55,824 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-21 22:10:55,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:55,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305554540] [2020-12-21 22:10:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:55,848 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161129287] [2020-12-21 22:10:55,848 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 [2020-12-21 22:10:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:10:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:56,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305554540] [2020-12-21 22:10:56,053 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:56,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161129287] [2020-12-21 22:10:56,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:56,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857445292] [2020-12-21 22:10:56,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:56,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:56,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:56,060 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-21 22:10:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:56,191 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-21 22:10:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:56,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:10:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:56,198 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:10:56,198 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:10:56,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:10:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-21 22:10:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:10:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-21 22:10:56,226 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-21 22:10:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:56,226 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-21 22:10:56,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-21 22:10:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:56,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:56,228 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:56,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:56,443 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:56,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-21 22:10:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:56,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920231462] [2020-12-21 22:10:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:56,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:56,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810253290] [2020-12-21 22:10:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:56,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:56,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:10:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920231462] [2020-12-21 22:10:56,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:56,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810253290] [2020-12-21 22:10:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122284709] [2020-12-21 22:10:56,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:56,711 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-21 22:10:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:56,896 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-21 22:10:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:56,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-21 22:10:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:56,899 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:10:56,899 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:10:56,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:10:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-21 22:10:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:10:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 22:10:56,909 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-21 22:10:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:56,909 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 22:10:56,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 22:10:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:10:56,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:56,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:57,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:57,125 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:57,126 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-21 22:10:57,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:57,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299431464] [2020-12-21 22:10:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:57,145 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:57,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346093940] [2020-12-21 22:10:57,145 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 [2020-12-21 22:10:57,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:10:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 22:10:57,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299431464] [2020-12-21 22:10:57,337 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:57,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346093940] [2020-12-21 22:10:57,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:57,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:10:57,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229889946] [2020-12-21 22:10:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:57,347 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2020-12-21 22:10:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:57,458 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-21 22:10:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:57,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-21 22:10:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:57,460 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:10:57,460 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:10:57,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:10:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-21 22:10:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:10:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-21 22:10:57,468 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-21 22:10:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:57,468 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-21 22:10:57,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-21 22:10:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:10:57,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:57,470 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:57,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:10:57,685 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-21 22:10:57,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:57,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178786273] [2020-12-21 22:10:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:57,715 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791523540] [2020-12-21 22:10:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-21 22:10:57,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:57,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:10:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:58,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178786273] [2020-12-21 22:10:58,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:58,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791523540] [2020-12-21 22:10:58,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:58,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873583702] [2020-12-21 22:10:58,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:10:58,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:58,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:10:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:10:58,015 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-21 22:10:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:58,289 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-21 22:10:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:58,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-21 22:10:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:58,291 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:10:58,291 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:10:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:10:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:10:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-21 22:10:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:10:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-21 22:10:58,301 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-21 22:10:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:58,301 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-21 22:10:58,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:10:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-21 22:10:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:10:58,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:58,302 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:58,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:58,517 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-21 22:10:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:58,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418274934] [2020-12-21 22:10:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:58,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:58,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126933644] [2020-12-21 22:10:58,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 22:10:58,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:10:58,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:10:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:59,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418274934] [2020-12-21 22:10:59,025 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:59,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126933644] [2020-12-21 22:10:59,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:59,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:59,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063058406] [2020-12-21 22:10:59,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:59,033 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-21 22:10:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:59,279 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-21 22:10:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:59,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:10:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:59,282 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:10:59,282 INFO L226 Difference]: Without dead ends: 283 [2020-12-21 22:10:59,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-21 22:10:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-21 22:10:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:10:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 22:10:59,310 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-21 22:10:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:59,310 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 22:10:59,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 22:10:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:10:59,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:59,312 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:59,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:59,520 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-21 22:10:59,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:59,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73313458] [2020-12-21 22:10:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:59,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:59,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253949365] [2020-12-21 22:10:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 22:10:59,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:10:59,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:59,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:10:59,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 22:10:59,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73313458] [2020-12-21 22:10:59,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253949365] [2020-12-21 22:10:59,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:59,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:59,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781543615] [2020-12-21 22:10:59,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:59,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:59,857 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-21 22:10:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:59,997 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:10:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:59,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:10:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:59,999 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:10:59,999 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:11:00,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:11:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:11:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:11:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-21 22:11:00,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-21 22:11:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:00,008 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-21 22:11:00,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-21 22:11:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:11:00,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:00,009 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:00,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:11:00,214 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-21 22:11:00,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:00,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604870178] [2020-12-21 22:11:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:00,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:00,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685322813] [2020-12-21 22:11:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:11:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:11:00,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604870178] [2020-12-21 22:11:00,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:00,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685322813] [2020-12-21 22:11:00,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:00,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:11:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765384071] [2020-12-21 22:11:00,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:11:00,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:11:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:00,644 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-21 22:11:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:00,915 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-21 22:11:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:11:00,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-21 22:11:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:00,918 INFO L225 Difference]: With dead ends: 450 [2020-12-21 22:11:00,918 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 22:11:00,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 22:11:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-21 22:11:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:11:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-21 22:11:00,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-21 22:11:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:00,931 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-21 22:11:00,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:11:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-21 22:11:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:11:00,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:00,932 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:01,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:11:01,146 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-21 22:11:01,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:01,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158220172] [2020-12-21 22:11:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:01,172 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:01,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235387716] [2020-12-21 22:11:01,172 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:01,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:11:01,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158220172] [2020-12-21 22:11:01,670 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:01,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235387716] [2020-12-21 22:11:01,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:01,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:11:01,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647335128] [2020-12-21 22:11:01,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:11:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:01,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:11:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:11:01,672 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-21 22:11:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:02,000 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-21 22:11:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:11:02,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 22:11:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:02,004 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:11:02,004 INFO L226 Difference]: Without dead ends: 504 [2020-12-21 22:11:02,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:11:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-21 22:11:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-21 22:11:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:11:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 22:11:02,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-21 22:11:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:02,035 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 22:11:02,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:11:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 22:11:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:11:02,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:02,037 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:02,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:11:02,250 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-21 22:11:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:02,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337268286] [2020-12-21 22:11:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:02,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:02,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739995144] [2020-12-21 22:11:02,280 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:02,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:11:02,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 22:11:02,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337268286] [2020-12-21 22:11:02,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739995144] [2020-12-21 22:11:02,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:02,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:11:02,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513238825] [2020-12-21 22:11:02,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:02,631 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-21 22:11:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:02,783 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-21 22:11:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:02,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-21 22:11:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:02,784 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:11:02,785 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:11:02,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:11:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:11:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 22:11:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:11:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-21 22:11:02,794 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-21 22:11:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:02,795 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-21 22:11:02,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-21 22:11:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:11:02,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:02,796 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:03,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:03,001 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-21 22:11:03,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:03,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598751804] [2020-12-21 22:11:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:03,026 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:03,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260091216] [2020-12-21 22:11:03,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:03,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:11:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:11:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598751804] [2020-12-21 22:11:03,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260091216] [2020-12-21 22:11:03,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:03,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:03,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954580818] [2020-12-21 22:11:03,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:11:03,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:11:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:11:03,648 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-21 22:11:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:04,408 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-21 22:11:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:11:04,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-21 22:11:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:04,412 INFO L225 Difference]: With dead ends: 580 [2020-12-21 22:11:04,412 INFO L226 Difference]: Without dead ends: 547 [2020-12-21 22:11:04,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:11:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-21 22:11:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-21 22:11:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:11:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-21 22:11:04,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-21 22:11:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:04,427 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-21 22:11:04,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:11:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-21 22:11:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:11:04,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:04,428 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:04,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:11:04,642 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-21 22:11:04,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:04,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093893908] [2020-12-21 22:11:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:04,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:04,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17485886] [2020-12-21 22:11:04,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:05,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:11:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:11:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:11:06,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093893908] [2020-12-21 22:11:06,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:06,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17485886] [2020-12-21 22:11:06,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:06,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:06,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773306893] [2020-12-21 22:11:06,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:11:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:11:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:11:06,143 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-21 22:11:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:06,573 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-21 22:11:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:11:06,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-21 22:11:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:06,577 INFO L225 Difference]: With dead ends: 757 [2020-12-21 22:11:06,578 INFO L226 Difference]: Without dead ends: 713 [2020-12-21 22:11:06,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:11:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-21 22:11:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-21 22:11:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:11:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-21 22:11:06,594 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-21 22:11:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:06,594 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-21 22:11:06,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:11:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-21 22:11:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:11:06,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:06,595 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:06,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:11:06,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-21 22:11:06,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:06,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554188340] [2020-12-21 22:11:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:06,831 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:06,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503103228] [2020-12-21 22:11:06,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:07,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:11:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:11:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 22:11:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554188340] [2020-12-21 22:11:07,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503103228] [2020-12-21 22:11:07,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:07,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:07,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131821183] [2020-12-21 22:11:07,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:07,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:07,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:07,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:07,402 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-21 22:11:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:07,577 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-21 22:11:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:07,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-21 22:11:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:07,581 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:11:07,581 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:11:07,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:11:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 22:11:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 22:11:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-21 22:11:07,594 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-21 22:11:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:07,595 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-21 22:11:07,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-21 22:11:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:07,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:07,596 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:07,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:07,810 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-21 22:11:07,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:07,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838315023] [2020-12-21 22:11:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:07,831 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:07,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336727219] [2020-12-21 22:11:07,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:11:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:11:08,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838315023] [2020-12-21 22:11:08,680 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:08,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336727219] [2020-12-21 22:11:08,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:08,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:11:08,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523067089] [2020-12-21 22:11:08,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:11:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:11:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:11:08,682 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-21 22:11:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:09,239 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-21 22:11:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:11:09,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-21 22:11:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:09,245 INFO L225 Difference]: With dead ends: 1003 [2020-12-21 22:11:09,245 INFO L226 Difference]: Without dead ends: 954 [2020-12-21 22:11:09,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:11:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-21 22:11:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-21 22:11:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:11:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-21 22:11:09,265 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-21 22:11:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:09,265 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-21 22:11:09,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:11:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-21 22:11:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 22:11:09,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:09,266 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:09,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:09,480 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-21 22:11:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:09,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360967082] [2020-12-21 22:11:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:09,503 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:09,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738517351] [2020-12-21 22:11:09,503 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:09,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:09,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:11:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:11:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360967082] [2020-12-21 22:11:10,560 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738517351] [2020-12-21 22:11:10,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:10,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:11:10,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309393382] [2020-12-21 22:11:10,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:11:10,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:11:10,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:11:10,562 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-21 22:11:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:11,313 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-21 22:11:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:11:11,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-21 22:11:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:11,319 INFO L225 Difference]: With dead ends: 1163 [2020-12-21 22:11:11,319 INFO L226 Difference]: Without dead ends: 1114 [2020-12-21 22:11:11,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:11:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-21 22:11:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-21 22:11:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:11:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-21 22:11:11,344 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-21 22:11:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:11,345 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-21 22:11:11,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:11:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-21 22:11:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 22:11:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:11,346 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:11,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:11,561 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-21 22:11:11,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:11,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684489420] [2020-12-21 22:11:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:11,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:11,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63803346] [2020-12-21 22:11:11,586 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:12,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:11:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 22:11:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684489420] [2020-12-21 22:11:12,380 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63803346] [2020-12-21 22:11:12,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:12,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:11:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383039324] [2020-12-21 22:11:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:11:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:11:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:12,382 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-21 22:11:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:12,584 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-21 22:11:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:11:12,585 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-21 22:11:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:12,586 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:11:12,586 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:11:12,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:11:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:11:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 22:11:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:11:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-21 22:11:12,608 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-21 22:11:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:12,609 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-21 22:11:12,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:11:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-21 22:11:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 22:11:12,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:12,611 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:12,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:11:12,815 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-21 22:11:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:12,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94703797] [2020-12-21 22:11:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:12,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190322006] [2020-12-21 22:11:12,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:12,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:12,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:11:14,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94703797] [2020-12-21 22:11:14,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:14,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190322006] [2020-12-21 22:11:14,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:14,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:14,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645595969] [2020-12-21 22:11:14,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:11:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:11:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:11:14,094 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-21 22:11:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,522 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-21 22:11:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:15,523 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-21 22:11:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,530 INFO L225 Difference]: With dead ends: 1247 [2020-12-21 22:11:15,530 INFO L226 Difference]: Without dead ends: 1204 [2020-12-21 22:11:15,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:11:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-21 22:11:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-21 22:11:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:11:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-21 22:11:15,554 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-21 22:11:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,554 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-21 22:11:15,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:11:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-21 22:11:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 22:11:15,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,556 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:15,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:11:15,770 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-21 22:11:15,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:15,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27367672] [2020-12-21 22:11:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:15,793 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:15,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902077118] [2020-12-21 22:11:15,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:27,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-21 22:11:27,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:11:27,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:11:28,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27367672] [2020-12-21 22:11:28,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:28,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902077118] [2020-12-21 22:11:28,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:28,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:28,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706427838] [2020-12-21 22:11:28,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:11:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:11:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:28,779 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-21 22:11:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:29,649 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-21 22:11:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:11:29,650 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-21 22:11:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:29,658 INFO L225 Difference]: With dead ends: 1515 [2020-12-21 22:11:29,658 INFO L226 Difference]: Without dead ends: 1458 [2020-12-21 22:11:29,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-21 22:11:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-21 22:11:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:11:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-21 22:11:29,687 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-21 22:11:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:29,688 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-21 22:11:29,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:11:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-21 22:11:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 22:11:29,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:29,690 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:29,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:29,891 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-21 22:11:29,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851017576] [2020-12-21 22:11:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:29,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:29,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451235620] [2020-12-21 22:11:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:30,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:11:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:11:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-21 22:11:30,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851017576] [2020-12-21 22:11:30,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:30,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451235620] [2020-12-21 22:11:30,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:30,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013428250] [2020-12-21 22:11:30,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:30,744 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-21 22:11:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:31,008 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-21 22:11:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:31,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-21 22:11:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:31,010 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:11:31,010 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:11:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:11:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:11:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:11:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:11:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-21 22:11:31,034 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-21 22:11:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:31,034 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-21 22:11:31,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-21 22:11:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 22:11:31,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:31,036 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:31,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:31,241 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-21 22:11:31,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:31,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401169042] [2020-12-21 22:11:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:31,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:31,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555764463] [2020-12-21 22:11:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:11:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:32,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401169042] [2020-12-21 22:11:32,817 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:32,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555764463] [2020-12-21 22:11:32,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:32,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:11:32,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001598031] [2020-12-21 22:11:32,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:11:32,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:32,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:11:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:32,820 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-21 22:11:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:33,925 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-21 22:11:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:33,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-21 22:11:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:33,933 INFO L225 Difference]: With dead ends: 1906 [2020-12-21 22:11:33,934 INFO L226 Difference]: Without dead ends: 1844 [2020-12-21 22:11:33,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-21 22:11:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-21 22:11:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:11:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-21 22:11:33,971 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-21 22:11:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:33,971 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-21 22:11:33,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:11:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-21 22:11:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 22:11:33,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:33,973 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:34,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:34,188 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-21 22:11:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:34,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958899027] [2020-12-21 22:11:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:34,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:34,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91485109] [2020-12-21 22:11:34,214 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:11:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958899027] [2020-12-21 22:11:36,222 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91485109] [2020-12-21 22:11:36,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:36,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-21 22:11:36,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852939260] [2020-12-21 22:11:36,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:11:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:11:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:36,224 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-21 22:11:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:37,619 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-21 22:11:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:11:37,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-21 22:11:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:37,627 INFO L225 Difference]: With dead ends: 2156 [2020-12-21 22:11:37,627 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 22:11:37,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 22:11:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-21 22:11:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:11:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-21 22:11:37,667 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-21 22:11:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:37,668 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-21 22:11:37,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:11:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-21 22:11:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-21 22:11:37,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:37,670 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:37,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:37,885 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-21 22:11:37,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:37,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194341464] [2020-12-21 22:11:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:37,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:37,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272481816] [2020-12-21 22:11:37,915 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:38,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:11:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2020-12-21 22:11:38,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194341464] [2020-12-21 22:11:38,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:38,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272481816] [2020-12-21 22:11:38,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:38,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:38,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735976908] [2020-12-21 22:11:38,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:38,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:38,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:38,644 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-21 22:11:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:38,858 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-21 22:11:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:38,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-21 22:11:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:38,862 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:11:38,862 INFO L226 Difference]: Without dead ends: 323 [2020-12-21 22:11:38,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-21 22:11:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-21 22:11:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:11:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-21 22:11:38,886 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-21 22:11:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:38,886 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-21 22:11:38,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-21 22:11:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:11:38,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:38,889 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:39,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:39,095 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-21 22:11:39,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:39,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429402247] [2020-12-21 22:11:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:39,123 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333113677] [2020-12-21 22:11:39,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:39,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:39,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:11:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:11:41,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429402247] [2020-12-21 22:11:41,680 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:41,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333113677] [2020-12-21 22:11:41,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:41,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-21 22:11:41,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561502419] [2020-12-21 22:11:41,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 22:11:41,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 22:11:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 22:11:41,684 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-21 22:11:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:45,741 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-21 22:11:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:11:45,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 22:11:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:45,748 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:11:45,748 INFO L226 Difference]: Without dead ends: 2089 [2020-12-21 22:11:45,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:11:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-21 22:11:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-21 22:11:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:11:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-21 22:11:45,792 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-21 22:11:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:45,792 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-21 22:11:45,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 22:11:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-21 22:11:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 22:11:45,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:45,794 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:46,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:46,008 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-21 22:11:46,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:46,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197736286] [2020-12-21 22:11:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:46,035 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331722006] [2020-12-21 22:11:46,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true