/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-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:11,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:11,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:11,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:38:11,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:38:11,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:38:11,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:38:11,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:38:11,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:38:11,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:38:11,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:38:11,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:38:11,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:38:11,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:38:11,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:38:11,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:38:11,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:38:11,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:38:11,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:38:11,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:38:11,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:38:11,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:38:11,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:38:11,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:38:11,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:38:11,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:11,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:11,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:11,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:11,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:11,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:11,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:11,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:11,802 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:11,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:11,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:11,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:11,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:11,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:11,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:11,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:11,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:11,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:11,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:11,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:11,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:11,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:11,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:11,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:11,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:12,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:12,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:12,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:12,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:12,248 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:12,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2020-12-21 21:38:12,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6a1b2969/16a5516aab054237a242d22b673e5007/FLAG1c3fdc7d7 [2020-12-21 21:38:13,097 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:13,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2020-12-21 21:38:13,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6a1b2969/16a5516aab054237a242d22b673e5007/FLAG1c3fdc7d7 [2020-12-21 21:38:13,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6a1b2969/16a5516aab054237a242d22b673e5007 [2020-12-21 21:38:13,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:13,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:13,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:13,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:13,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:13,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b655e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13, skipping insertion in model container [2020-12-21 21:38:13,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:13,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:13,692 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-examples/standard_init9_ground-2.i[816,829] [2020-12-21 21:38:13,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:13,731 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:13,747 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-examples/standard_init9_ground-2.i[816,829] [2020-12-21 21:38:13,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:13,779 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:13,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13 WrapperNode [2020-12-21 21:38:13,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:13,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:13,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:13,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:13,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:13,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:13,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:13,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:13,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (1/1) ... [2020-12-21 21:38:13,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:13,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:13,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:13,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:13,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (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 21:38:14,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:14,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:14,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:14,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:14,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:14,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:14,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:14,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:14,502 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-21 21:38:14,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:14 BoogieIcfgContainer [2020-12-21 21:38:14,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:14,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:14,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:14,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:14,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:13" (1/3) ... [2020-12-21 21:38:14,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0bbcb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:14, skipping insertion in model container [2020-12-21 21:38:14,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:13" (2/3) ... [2020-12-21 21:38:14,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0bbcb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:14, skipping insertion in model container [2020-12-21 21:38:14,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:14" (3/3) ... [2020-12-21 21:38:14,541 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2020-12-21 21:38:14,550 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:14,556 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:38:14,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:38:14,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:14,606 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:14,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:14,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:14,607 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:14,607 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:14,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:14,607 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:38:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:38:14,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:14,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:14,632 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2020-12-21 21:38:14,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:14,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518196376] [2020-12-21 21:38:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:14,854 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 21:38:14,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518196376] [2020-12-21 21:38:14,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:14,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796478943] [2020-12-21 21:38:14,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:14,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:14,885 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-12-21 21:38:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:15,042 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2020-12-21 21:38:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:15,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 21:38:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:15,055 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:38:15,055 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:38:15,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:38:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:38:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:38:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-21 21:38:15,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2020-12-21 21:38:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:15,104 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-21 21:38:15,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-21 21:38:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:38:15,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:15,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:15,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:15,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2020-12-21 21:38:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:15,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344819870] [2020-12-21 21:38:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:38:15,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344819870] [2020-12-21 21:38:15,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726029289] [2020-12-21 21:38:15,180 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 21:38:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:38:15,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:15,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:15,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029614490] [2020-12-21 21:38:15,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:15,414 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-12-21 21:38:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:15,627 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-12-21 21:38:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:15,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-21 21:38:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:15,630 INFO L225 Difference]: With dead ends: 75 [2020-12-21 21:38:15,630 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:38:15,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:38:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:38:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:38:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 21:38:15,642 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [2020-12-21 21:38:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:15,642 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 21:38:15,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 21:38:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:38:15,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:15,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:15,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:38:15,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -368986008, now seen corresponding path program 2 times [2020-12-21 21:38:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087305813] [2020-12-21 21:38:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:38:16,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087305813] [2020-12-21 21:38:16,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761326787] [2020-12-21 21:38:16,015 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 21:38:16,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:38:16,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:16,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:38:16,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819396007] [2020-12-21 21:38:16,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:38:16,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:38:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:16,269 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-12-21 21:38:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:16,483 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2020-12-21 21:38:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:38:16,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-12-21 21:38:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:16,486 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:38:16,486 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:38:16,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:38:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:38:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:38:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-12-21 21:38:16,499 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 41 [2020-12-21 21:38:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:16,499 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-12-21 21:38:16,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:38:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-12-21 21:38:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:38:16,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:16,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:16,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:16,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 763354719, now seen corresponding path program 3 times [2020-12-21 21:38:16,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:16,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592897929] [2020-12-21 21:38:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:38:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592897929] [2020-12-21 21:38:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281980748] [2020-12-21 21:38:16,858 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 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 21:38:17,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:38:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:38:17,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:17,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:38:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791014599] [2020-12-21 21:38:17,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:17,337 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 7 states. [2020-12-21 21:38:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:17,573 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2020-12-21 21:38:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:38:17,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-21 21:38:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:17,576 INFO L225 Difference]: With dead ends: 109 [2020-12-21 21:38:17,576 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:17,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:38:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:38:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-21 21:38:17,587 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2020-12-21 21:38:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:17,587 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-21 21:38:17,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-21 21:38:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:38:17,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:17,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:17,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:17,804 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 4 times [2020-12-21 21:38:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:17,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409494087] [2020-12-21 21:38:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 21:38:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409494087] [2020-12-21 21:38:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812636562] [2020-12-21 21:38:18,009 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 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 21:38:18,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:18,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-21 21:38:18,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:18,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:18,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627969182] [2020-12-21 21:38:18,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:18,334 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2020-12-21 21:38:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:18,585 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2020-12-21 21:38:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:18,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-12-21 21:38:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:18,588 INFO L225 Difference]: With dead ends: 126 [2020-12-21 21:38:18,588 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:38:18,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:38:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-21 21:38:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:38:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2020-12-21 21:38:18,599 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 59 [2020-12-21 21:38:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:18,600 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2020-12-21 21:38:18,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2020-12-21 21:38:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:38:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:18,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:18,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:18,806 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1617731713, now seen corresponding path program 5 times [2020-12-21 21:38:18,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:18,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624290186] [2020-12-21 21:38:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:38:18,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624290186] [2020-12-21 21:38:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240725406] [2020-12-21 21:38:18,956 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 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 21:38:44,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:38:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:38:44,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:44,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:38:44,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146416363] [2020-12-21 21:38:44,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:44,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:44,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:44,475 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 9 states. [2020-12-21 21:38:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:44,747 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-12-21 21:38:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:38:44,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-12-21 21:38:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:44,749 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:38:44,749 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:38:44,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:38:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-21 21:38:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:38:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-12-21 21:38:44,760 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 68 [2020-12-21 21:38:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:44,761 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-12-21 21:38:44,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-12-21 21:38:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:38:44,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:44,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:44,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:38:44,964 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1599394776, now seen corresponding path program 6 times [2020-12-21 21:38:44,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:44,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460257800] [2020-12-21 21:38:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:38:45,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460257800] [2020-12-21 21:38:45,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517395885] [2020-12-21 21:38:45,223 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 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 21:38:47,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:38:47,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:47,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:38:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-12-21 21:38:47,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:47,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:38:47,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19380269] [2020-12-21 21:38:47,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:38:47,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:38:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:47,977 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 10 states. [2020-12-21 21:38:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,287 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-12-21 21:38:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:48,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-12-21 21:38:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,289 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:38:48,289 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:38:48,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:38:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-21 21:38:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:38:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-12-21 21:38:48,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 77 [2020-12-21 21:38:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,302 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-12-21 21:38:48,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:38:48,302 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-12-21 21:38:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:38:48,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,304 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:48,517 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1824577695, now seen corresponding path program 7 times [2020-12-21 21:38:48,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961635922] [2020-12-21 21:38:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-21 21:38:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961635922] [2020-12-21 21:38:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563589089] [2020-12-21 21:38:48,694 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 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 21:38:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-12-21 21:38:49,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:49,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:38:49,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827006965] [2020-12-21 21:38:49,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:38:49,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:38:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:49,027 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 11 states. [2020-12-21 21:38:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,322 INFO L93 Difference]: Finished difference Result 177 states and 203 transitions. [2020-12-21 21:38:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:38:49,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-12-21 21:38:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,324 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:38:49,324 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:38:49,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:38:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-21 21:38:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:38:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2020-12-21 21:38:49,335 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 86 [2020-12-21 21:38:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,335 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2020-12-21 21:38:49,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:38:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2020-12-21 21:38:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:38:49,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,337 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:49,552 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1137069560, now seen corresponding path program 8 times [2020-12-21 21:38:49,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575082372] [2020-12-21 21:38:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:38:49,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575082372] [2020-12-21 21:38:49,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419564953] [2020-12-21 21:38:49,769 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 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 21:38:49,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-12-21 21:38:50,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:50,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:38:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604974040] [2020-12-21 21:38:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:50,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:50,111 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand 12 states. [2020-12-21 21:38:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:50,436 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2020-12-21 21:38:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:38:50,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-12-21 21:38:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:50,438 INFO L225 Difference]: With dead ends: 194 [2020-12-21 21:38:50,438 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:38:50,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:38:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-21 21:38:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:38:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-12-21 21:38:50,448 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 95 [2020-12-21 21:38:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:50,449 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-12-21 21:38:50,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-12-21 21:38:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:38:50,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:50,451 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:50,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:38:50,664 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash -6141505, now seen corresponding path program 9 times [2020-12-21 21:38:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:50,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514372967] [2020-12-21 21:38:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-12-21 21:38:50,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514372967] [2020-12-21 21:38:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569248455] [2020-12-21 21:38:50,875 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 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 21:39:16,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:39:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:39:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-12-21 21:39:16,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:16,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:39:16,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656796659] [2020-12-21 21:39:16,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:39:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:39:16,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:39:16,979 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 13 states. [2020-12-21 21:39:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:17,323 INFO L93 Difference]: Finished difference Result 211 states and 237 transitions. [2020-12-21 21:39:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:39:17,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2020-12-21 21:39:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:17,325 INFO L225 Difference]: With dead ends: 211 [2020-12-21 21:39:17,326 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:39:17,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:39:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:39:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-21 21:39:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:39:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2020-12-21 21:39:17,336 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 104 [2020-12-21 21:39:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:17,337 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2020-12-21 21:39:17,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:39:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2020-12-21 21:39:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:39:17,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:17,339 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:17,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:17,540 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1477001240, now seen corresponding path program 10 times [2020-12-21 21:39:17,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:17,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989251013] [2020-12-21 21:39:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-21 21:39:17,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989251013] [2020-12-21 21:39:17,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947392769] [2020-12-21 21:39:17,801 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 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 21:39:17,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:17,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:39:17,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-12-21 21:39:18,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:18,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:39:18,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53971909] [2020-12-21 21:39:18,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:39:18,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:39:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:18,147 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 14 states. [2020-12-21 21:39:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:18,576 INFO L93 Difference]: Finished difference Result 228 states and 254 transitions. [2020-12-21 21:39:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:39:18,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 113 [2020-12-21 21:39:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:18,579 INFO L225 Difference]: With dead ends: 228 [2020-12-21 21:39:18,579 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:39:18,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:39:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-21 21:39:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:39:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2020-12-21 21:39:18,589 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 113 [2020-12-21 21:39:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:18,589 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2020-12-21 21:39:18,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:39:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2020-12-21 21:39:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:39:18,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:18,597 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:18,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:18,812 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash -699288865, now seen corresponding path program 11 times [2020-12-21 21:39:18,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:18,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135503300] [2020-12-21 21:39:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:39:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135503300] [2020-12-21 21:39:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909164898] [2020-12-21 21:39:19,069 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 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