/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:11:00,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:11:00,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:11:01,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:11:01,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:11:01,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:11:01,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:11:01,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:11:01,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:11:01,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:11:01,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:11:01,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:11:01,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:11:01,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:11:01,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:11:01,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:11:01,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:11:01,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:11:01,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:11:01,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:11:01,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:11:01,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:11:01,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:11:01,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:11:01,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:11:01,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:11:01,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:11:01,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:11:01,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:11:01,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:11:01,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:11:01,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:11:01,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:11:01,203 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:11:01,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:11:01,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:11:01,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:11:01,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:11:01,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:11:01,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:11:01,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:11:01,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:11:01,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:11:01,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:11:01,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:11:01,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:11:01,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:11:01,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:11:01,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:11:01,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:11:01,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:11:01,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:11:01,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:11:01,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:11:01,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:11:01,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:11:01,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:11:01,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:11:01,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:11:01,762 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:11:01,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_5.c [2020-12-21 22:11:01,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b57b6ff/35461ba873864b4687e7e2706b8c2e78/FLAGc74c08cfa [2020-12-21 22:11:02,472 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:11:02,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2020-12-21 22:11:02,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b57b6ff/35461ba873864b4687e7e2706b8c2e78/FLAGc74c08cfa [2020-12-21 22:11:02,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b57b6ff/35461ba873864b4687e7e2706b8c2e78 [2020-12-21 22:11:02,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:11:02,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:11:02,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:02,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:11:02,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:11:02,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:02" (1/1) ... [2020-12-21 22:11:02,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba541e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:02, skipping insertion in model container [2020-12-21 22:11:02,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:02" (1/1) ... [2020-12-21 22:11:02,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:11:02,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:11:03,008 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_5.c[323,336] [2020-12-21 22:11:03,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:03,036 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:11:03,050 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_5.c[323,336] [2020-12-21 22:11:03,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:03,075 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:11:03,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03 WrapperNode [2020-12-21 22:11:03,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:03,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:03,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:11:03,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:11:03,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:03,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:11:03,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:11:03,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:11:03,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (1/1) ... [2020-12-21 22:11:03,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:11:03,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:11:03,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:11:03,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:11:03,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (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 22:11:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:11:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:11:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:11:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:11:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:11:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:11:03,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:11:03,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:11:03,552 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:11:03,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:03 BoogieIcfgContainer [2020-12-21 22:11:03,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:11:03,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:11:03,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:11:03,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:11:03,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:11:02" (1/3) ... [2020-12-21 22:11:03,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a95d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:03, skipping insertion in model container [2020-12-21 22:11:03,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:03" (2/3) ... [2020-12-21 22:11:03,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a95d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:03, skipping insertion in model container [2020-12-21 22:11:03,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:03" (3/3) ... [2020-12-21 22:11:03,564 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2020-12-21 22:11:03,571 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:11:03,577 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:11:03,598 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:11:03,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:11:03,632 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:11:03,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:11:03,632 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:11:03,632 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:11:03,633 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:11:03,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:11:03,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:11:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:11:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:11:03,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:03,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:03,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-21 22:11:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:03,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019683665] [2020-12-21 22:11:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:04,017 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 22:11:04,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019683665] [2020-12-21 22:11:04,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:04,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:11:04,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442071243] [2020-12-21 22:11:04,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:11:04,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:11:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:11:04,053 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 22:11:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:04,080 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-21 22:11:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:11:04,082 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:11:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:04,101 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:11:04,101 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:11:04,104 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 22:11:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:11:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:11:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:11:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-21 22:11:04,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-21 22:11:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:04,139 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-21 22:11:04,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:11:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-21 22:11:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:11:04,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:04,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:04,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:11:04,141 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-21 22:11:04,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:04,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751745029] [2020-12-21 22:11:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:04,227 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 22:11:04,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751745029] [2020-12-21 22:11:04,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:04,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:11:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904690255] [2020-12-21 22:11:04,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:11:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:11:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:11:04,232 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-21 22:11:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:04,314 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-21 22:11:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:11:04,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-21 22:11:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:04,316 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:11:04,316 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:11:04,317 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 22:11:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:11:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-21 22:11:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:11:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:11:04,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 22:11:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:04,326 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:11:04,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:11:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:11:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:11:04,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:04,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:04,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:11:04,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-21 22:11:04,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228477379] [2020-12-21 22:11:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:04,506 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 22:11:04,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228477379] [2020-12-21 22:11:04,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684778068] [2020-12-21 22:11:04,508 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 22:11:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:04,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:11:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:04,714 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 22:11:04,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:11:04,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:11:04,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082503518] [2020-12-21 22:11:04,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:11:04,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:11:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:11:04,723 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-21 22:11:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:04,872 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-21 22:11:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:11:04,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 22:11:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:04,874 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:11:04,875 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:11:04,875 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 22:11:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:11:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 22:11:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:11:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:11:04,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-21 22:11:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:04,882 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:11:04,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:11:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:11:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:11:04,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:04,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:05,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:11:05,100 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-21 22:11:05,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:05,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395725263] [2020-12-21 22:11:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:05,200 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 22:11:05,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395725263] [2020-12-21 22:11:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303314182] [2020-12-21 22:11:05,201 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 22:11:05,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:11:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:11:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:05,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:05,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:05,473 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 22:11:05,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:05,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-21 22:11:05,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924129979] [2020-12-21 22:11:05,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:11:05,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:11:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:05,477 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:11:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:05,633 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:11:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:11:05,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:11:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:05,636 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:11:05,636 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:11:05,637 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 22:11:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:11:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:11:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:11:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 22:11:05,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-21 22:11:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:05,645 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 22:11:05,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:11:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 22:11:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:11:05,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:05,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:05,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:05,860 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-21 22:11:05,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:05,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733083257] [2020-12-21 22:11:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:06,000 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 22:11:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733083257] [2020-12-21 22:11:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583279996] [2020-12-21 22:11:06,002 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 22:11:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:11:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:06,148 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 22:11:06,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:11:06,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:11:06,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254156206] [2020-12-21 22:11:06,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:06,152 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-21 22:11:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:06,247 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-21 22:11:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:11:06,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 22:11:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:06,249 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:11:06,250 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:11:06,251 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 22:11:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:11:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-21 22:11:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:11:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 22:11:06,259 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-21 22:11:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:06,259 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 22:11:06,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 22:11:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:11:06,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:06,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:06,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:06,477 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-21 22:11:06,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:06,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628467996] [2020-12-21 22:11:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:06,560 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 22:11:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628467996] [2020-12-21 22:11:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816287077] [2020-12-21 22:11:06,561 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 22:11:06,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:06,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:11:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:06,727 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 22:11:06,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:11:06,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:11:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776522842] [2020-12-21 22:11:06,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:06,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:06,730 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-21 22:11:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:06,835 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-21 22:11:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:11:06,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 22:11:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:06,837 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:11:06,837 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:11:06,838 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 22:11:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:11:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-21 22:11:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:11:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-21 22:11:06,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-21 22:11:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:06,846 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-21 22:11:06,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-21 22:11:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:11:06,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:06,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:07,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:07,063 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-21 22:11:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996100781] [2020-12-21 22:11:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:07,155 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 22:11:07,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996100781] [2020-12-21 22:11:07,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424377235] [2020-12-21 22:11:07,156 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 22:11:07,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:11:07,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:11:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:07,302 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 22:11:07,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:07,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-21 22:11:07,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807676570] [2020-12-21 22:11:07,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:11:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:07,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:11:07,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:07,306 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-21 22:11:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:07,367 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-21 22:11:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:11:07,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 22:11:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:07,380 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:11:07,380 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:11:07,380 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 22:11:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:11:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-21 22:11:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:11:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-21 22:11:07,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-21 22:11:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:07,388 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-21 22:11:07,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:11:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-21 22:11:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:11:07,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:07,389 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:07,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:11:07,591 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-21 22:11:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:07,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568796353] [2020-12-21 22:11:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:07,609 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:07,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712909345] [2020-12-21 22:11:07,610 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 22:11:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:07,817 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 22:11:07,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568796353] [2020-12-21 22:11:07,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:07,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712909345] [2020-12-21 22:11:07,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:07,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:07,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964491081] [2020-12-21 22:11:07,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:07,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:07,821 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-21 22:11:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:07,959 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-21 22:11:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:07,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:11:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:07,966 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:11:07,966 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:11:07,968 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 22:11:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:11:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-21 22:11:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:11:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-21 22:11:07,993 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-21 22:11:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:07,994 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-21 22:11:07,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-21 22:11:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:11:08,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:08,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:08,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:08,202 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-21 22:11:08,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:08,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140173549] [2020-12-21 22:11:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:08,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:08,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098279018] [2020-12-21 22:11:08,218 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 22:11:08,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:08,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:08,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:11:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:08,443 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 22:11:08,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140173549] [2020-12-21 22:11:08,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:08,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098279018] [2020-12-21 22:11:08,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590566002] [2020-12-21 22:11:08,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:08,446 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-21 22:11:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:08,609 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-21 22:11:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:08,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-21 22:11:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:08,611 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:11:08,611 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:11:08,612 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 22:11:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:11:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-21 22:11:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:11:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 22:11:08,621 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-21 22:11:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:08,621 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 22:11:08,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 22:11:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:11:08,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:08,623 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:08,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:08,839 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-21 22:11:08,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:08,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720233476] [2020-12-21 22:11:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:08,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:08,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579641913] [2020-12-21 22:11:08,858 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 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 22:11:08,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:11:08,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:11:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:09,074 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 22:11:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720233476] [2020-12-21 22:11:09,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579641913] [2020-12-21 22:11:09,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:09,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:11:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226941167] [2020-12-21 22:11:09,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:11:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:11:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:11:09,086 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-21 22:11:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:09,190 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-21 22:11:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:09,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:11:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:09,192 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:11:09,192 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:11:09,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:11:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-21 22:11:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:11:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-21 22:11:09,200 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-21 22:11:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:09,200 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-21 22:11:09,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:11:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-21 22:11:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:11:09,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:09,202 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:09,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:11:09,417 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-21 22:11:09,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:09,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384340278] [2020-12-21 22:11:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:09,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:09,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914457677] [2020-12-21 22:11:09,435 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 22:11:09,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:09,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:11:09,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:09,772 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 22:11:09,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384340278] [2020-12-21 22:11:09,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:09,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914457677] [2020-12-21 22:11:09,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:09,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:11:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776512431] [2020-12-21 22:11:09,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:09,776 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-21 22:11:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:10,076 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-21 22:11:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:10,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-21 22:11:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:10,078 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:11:10,078 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:11:10,079 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 22:11:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:11:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-21 22:11:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:11:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-21 22:11:10,087 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-21 22:11:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:10,087 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-21 22:11:10,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-21 22:11:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:11:10,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:10,088 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:10,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:10,302 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-21 22:11:10,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:10,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071665175] [2020-12-21 22:11:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:10,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:10,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216601686] [2020-12-21 22:11:10,319 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 22:11:10,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:11:10,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:11:10,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:10,832 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 22:11:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071665175] [2020-12-21 22:11:10,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216601686] [2020-12-21 22:11:10,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:10,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:11:10,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615963746] [2020-12-21 22:11:10,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:11:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:11:10,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:11:10,840 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-21 22:11:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:11,055 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-21 22:11:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:11,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:11:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:11,058 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:11:11,058 INFO L226 Difference]: Without dead ends: 283 [2020-12-21 22:11:11,059 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 22:11:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-21 22:11:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-21 22:11:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:11:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 22:11:11,070 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-21 22:11:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:11,070 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 22:11:11,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:11:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 22:11:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:11:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:11,071 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:11,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:11,276 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-21 22:11:11,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:11,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476238387] [2020-12-21 22:11:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:11,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:11,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058611161] [2020-12-21 22:11:11,319 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 22:11:11,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:11:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:11:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:11,608 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 22:11:11,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476238387] [2020-12-21 22:11:11,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:11,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058611161] [2020-12-21 22:11:11,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:11,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682132352] [2020-12-21 22:11:11,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:11,611 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-21 22:11:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:11,734 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:11:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:11:11,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:11:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:11,735 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:11:11,735 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:11:11,736 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 22:11:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:11:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:11:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:11:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-21 22:11:11,744 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-21 22:11:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:11,744 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-21 22:11:11,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-21 22:11:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:11:11,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:11,746 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:11,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:11:11,960 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-21 22:11:11,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:11,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145737984] [2020-12-21 22:11:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:11,979 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080233741] [2020-12-21 22:11:11,980 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 22:11:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:12,348 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 22:11:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145737984] [2020-12-21 22:11:12,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:12,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080233741] [2020-12-21 22:11:12,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:12,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:11:12,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506609309] [2020-12-21 22:11:12,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:11:12,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:12,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:11:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:12,354 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-21 22:11:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:12,602 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-21 22:11:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:11:12,602 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-21 22:11:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:12,605 INFO L225 Difference]: With dead ends: 450 [2020-12-21 22:11:12,605 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 22:11:12,606 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 22:11:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 22:11:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-21 22:11:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:11:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-21 22:11:12,620 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-21 22:11:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:12,620 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-21 22:11:12,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:11:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-21 22:11:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:11:12,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:12,622 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:12,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:11:12,837 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-21 22:11:12,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486388410] [2020-12-21 22:11:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:12,872 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:12,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526116457] [2020-12-21 22:11:12,873 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 22:11:12,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:13,339 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 22:11:13,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486388410] [2020-12-21 22:11:13,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:13,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526116457] [2020-12-21 22:11:13,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:13,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:11:13,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213141043] [2020-12-21 22:11:13,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:11:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:11:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:11:13,342 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-21 22:11:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:13,645 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-21 22:11:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:11:13,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 22:11:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:13,649 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:11:13,649 INFO L226 Difference]: Without dead ends: 504 [2020-12-21 22:11:13,650 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 22:11:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-21 22:11:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-21 22:11:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:11:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 22:11:13,662 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-21 22:11:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:13,662 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 22:11:13,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:11:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 22:11:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:11:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:13,664 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:13,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:11:13,878 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-21 22:11:13,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:13,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851085075] [2020-12-21 22:11:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:13,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:13,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17996915] [2020-12-21 22:11:13,896 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 22:11:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:11:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:14,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:14,226 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 22:11:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851085075] [2020-12-21 22:11:14,227 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17996915] [2020-12-21 22:11:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:11:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084163979] [2020-12-21 22:11:14,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:14,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:14,229 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-21 22:11:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:14,394 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-21 22:11:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:14,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-21 22:11:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:14,396 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:11:14,396 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:11:14,397 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 22:11:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:11:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 22:11:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:11:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-21 22:11:14,405 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-21 22:11:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:14,406 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-21 22:11:14,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-21 22:11:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:11:14,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:14,407 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:14,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:14,613 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-21 22:11:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:14,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605757764] [2020-12-21 22:11:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:14,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:14,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920664359] [2020-12-21 22:11:14,638 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 22:11:14,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:11:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:15,201 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 22:11:15,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605757764] [2020-12-21 22:11:15,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:15,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920664359] [2020-12-21 22:11:15,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:15,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:15,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852542195] [2020-12-21 22:11:15,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:11:15,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:11:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:11:15,205 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-21 22:11:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,920 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-21 22:11:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:11:15,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-21 22:11:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,924 INFO L225 Difference]: With dead ends: 580 [2020-12-21 22:11:15,924 INFO L226 Difference]: Without dead ends: 547 [2020-12-21 22:11:15,924 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 22:11:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-21 22:11:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-21 22:11:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:11:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-21 22:11:15,935 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-21 22:11:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,936 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-21 22:11:15,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:11:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-21 22:11:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:11:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,937 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:16,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:11:16,146 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-21 22:11:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:16,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247027900] [2020-12-21 22:11:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:16,164 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:16,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886477456] [2020-12-21 22:11:16,164 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 22:11:17,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:11:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:11:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:17,652 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 22:11:17,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247027900] [2020-12-21 22:11:17,652 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:17,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886477456] [2020-12-21 22:11:17,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:17,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:17,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330317757] [2020-12-21 22:11:17,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:11:17,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:11:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:11:17,655 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-21 22:11:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:18,103 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-21 22:11:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:11:18,104 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-21 22:11:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:18,109 INFO L225 Difference]: With dead ends: 757 [2020-12-21 22:11:18,109 INFO L226 Difference]: Without dead ends: 713 [2020-12-21 22:11:18,110 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 22:11:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-21 22:11:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-21 22:11:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:11:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-21 22:11:18,142 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-21 22:11:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:18,142 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-21 22:11:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:11:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-21 22:11:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:11:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:18,144 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:18,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:11:18,350 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-21 22:11:18,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:18,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650674998] [2020-12-21 22:11:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:18,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:18,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306764948] [2020-12-21 22:11:18,371 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 22:11:18,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:11:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:18,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:11:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:18,905 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 22:11:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650674998] [2020-12-21 22:11:18,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306764948] [2020-12-21 22:11:18,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:18,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:18,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344156076] [2020-12-21 22:11:18,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:18,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:18,908 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-21 22:11:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:19,103 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-21 22:11:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:19,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-21 22:11:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:19,106 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:11:19,106 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:11:19,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:11:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 22:11:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 22:11:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-21 22:11:19,119 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-21 22:11:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:19,120 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-21 22:11:19,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-21 22:11:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:19,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:19,121 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:19,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:19,336 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:19,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-21 22:11:19,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:19,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141062289] [2020-12-21 22:11:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:19,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:19,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086582265] [2020-12-21 22:11:19,357 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 22:11:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:11:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:20,208 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 22:11:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141062289] [2020-12-21 22:11:20,208 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086582265] [2020-12-21 22:11:20,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:20,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:11:20,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925698592] [2020-12-21 22:11:20,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:11:20,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:11:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:11:20,211 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-21 22:11:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:20,795 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-21 22:11:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:11:20,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-21 22:11:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:20,802 INFO L225 Difference]: With dead ends: 1003 [2020-12-21 22:11:20,802 INFO L226 Difference]: Without dead ends: 954 [2020-12-21 22:11:20,803 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 22:11:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-21 22:11:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-21 22:11:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:11:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-21 22:11:20,824 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-21 22:11:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:20,824 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-21 22:11:20,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:11:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-21 22:11:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 22:11:20,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:20,826 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:21,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:21,040 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-21 22:11:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:21,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426951695] [2020-12-21 22:11:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:21,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:21,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671227190] [2020-12-21 22:11:21,060 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 22:11:21,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:11:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:22,066 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 22:11:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426951695] [2020-12-21 22:11:22,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671227190] [2020-12-21 22:11:22,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:22,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:11:22,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617737563] [2020-12-21 22:11:22,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:11:22,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:11:22,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:11:22,068 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-21 22:11:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:22,695 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-21 22:11:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:11:22,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-21 22:11:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:22,702 INFO L225 Difference]: With dead ends: 1163 [2020-12-21 22:11:22,702 INFO L226 Difference]: Without dead ends: 1114 [2020-12-21 22:11:22,703 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 22:11:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-21 22:11:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-21 22:11:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:11:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-21 22:11:22,722 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-21 22:11:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:22,723 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-21 22:11:22,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:11:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-21 22:11:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 22:11:22,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:22,724 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:22,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:22,939 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-21 22:11:22,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:22,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38127103] [2020-12-21 22:11:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:22,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145421867] [2020-12-21 22:11:22,965 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 22:11:23,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:11:23,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:11:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:23,514 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 22:11:23,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38127103] [2020-12-21 22:11:23,515 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:23,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145421867] [2020-12-21 22:11:23,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:23,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:11:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191096744] [2020-12-21 22:11:23,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:11:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:11:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:23,519 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-21 22:11:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:23,731 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-21 22:11:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:11:23,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-21 22:11:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:23,733 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:11:23,733 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:11:23,734 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 22:11:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:11:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 22:11:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:11:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-21 22:11:23,749 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-21 22:11:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:23,750 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-21 22:11:23,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:11:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-21 22:11:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 22:11:23,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:23,752 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:23,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:11:23,965 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:23,965 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-21 22:11:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:23,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810873643] [2020-12-21 22:11:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:23,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:23,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050910338] [2020-12-21 22:11:23,989 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 22:11:24,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:24,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:11:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:25,174 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 22:11:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810873643] [2020-12-21 22:11:25,175 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050910338] [2020-12-21 22:11:25,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:25,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:25,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133928979] [2020-12-21 22:11:25,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:11:25,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:11:25,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:11:25,178 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-21 22:11:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:26,608 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-21 22:11:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:26,609 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-21 22:11:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:26,614 INFO L225 Difference]: With dead ends: 1247 [2020-12-21 22:11:26,614 INFO L226 Difference]: Without dead ends: 1204 [2020-12-21 22:11:26,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:11:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-21 22:11:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-21 22:11:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:11:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-21 22:11:26,637 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-21 22:11:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:26,638 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-21 22:11:26,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:11:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-21 22:11:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 22:11:26,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:26,639 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:26,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:11:26,853 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-21 22:11:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:26,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718441254] [2020-12-21 22:11:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:26,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:26,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296571994] [2020-12-21 22:11:26,875 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 22:11:37,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-21 22:11:37,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:11:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:38,621 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 22:11:38,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718441254] [2020-12-21 22:11:38,622 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:38,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296571994] [2020-12-21 22:11:38,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:38,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:38,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689673105] [2020-12-21 22:11:38,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:11:38,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:11:38,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:38,625 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-21 22:11:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:39,447 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-21 22:11:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:11:39,448 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-21 22:11:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:39,457 INFO L225 Difference]: With dead ends: 1515 [2020-12-21 22:11:39,457 INFO L226 Difference]: Without dead ends: 1458 [2020-12-21 22:11:39,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-21 22:11:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-21 22:11:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:11:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-21 22:11:39,486 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-21 22:11:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:39,486 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-21 22:11:39,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:11:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-21 22:11:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 22:11:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:39,487 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:39,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:39,702 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-21 22:11:39,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:39,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987603190] [2020-12-21 22:11:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:39,724 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:39,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895435931] [2020-12-21 22:11:39,724 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 22:11:40,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:11:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:11:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:40,917 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 22:11:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987603190] [2020-12-21 22:11:40,918 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895435931] [2020-12-21 22:11:40,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:40,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396613664] [2020-12-21 22:11:40,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:40,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:40,919 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-21 22:11:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:41,180 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-21 22:11:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:41,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-21 22:11:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:41,182 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:11:41,182 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:11:41,183 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 22:11:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:11:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:11:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:11:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-21 22:11:41,205 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-21 22:11:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:41,205 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-21 22:11:41,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-21 22:11:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 22:11:41,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:41,207 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:41,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:41,413 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-21 22:11:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:41,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950500888] [2020-12-21 22:11:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:41,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:41,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992375528] [2020-12-21 22:11:41,435 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 22:11:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:11:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:43,000 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 22:11:43,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950500888] [2020-12-21 22:11:43,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:43,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992375528] [2020-12-21 22:11:43,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:43,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:11:43,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141995008] [2020-12-21 22:11:43,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:11:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:11:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:43,002 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-21 22:11:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:44,196 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-21 22:11:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:44,196 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-21 22:11:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:44,203 INFO L225 Difference]: With dead ends: 1906 [2020-12-21 22:11:44,203 INFO L226 Difference]: Without dead ends: 1844 [2020-12-21 22:11:44,204 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 22:11:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-21 22:11:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-21 22:11:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:11:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-21 22:11:44,237 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-21 22:11:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:44,237 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-21 22:11:44,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:11:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-21 22:11:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 22:11:44,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:44,239 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:44,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:44,456 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-21 22:11:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:44,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244121810] [2020-12-21 22:11:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:44,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576546634] [2020-12-21 22:11:44,482 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 22:11:44,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:44,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:11:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:46,453 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 22:11:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244121810] [2020-12-21 22:11:46,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576546634] [2020-12-21 22:11:46,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:46,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-21 22:11:46,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956244815] [2020-12-21 22:11:46,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:11:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:11:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:46,456 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-21 22:11:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:47,809 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-21 22:11:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:11:47,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-21 22:11:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:47,816 INFO L225 Difference]: With dead ends: 2156 [2020-12-21 22:11:47,817 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 22:11:47,818 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 22:11:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 22:11:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-21 22:11:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:11:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-21 22:11:47,856 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-21 22:11:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:47,856 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-21 22:11:47,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:11:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-21 22:11:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-21 22:11:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:47,858 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:48,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:48,072 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-21 22:11:48,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:48,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228846906] [2020-12-21 22:11:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:48,098 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:48,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680738702] [2020-12-21 22:11:48,099 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 22:11:48,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:11:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:49,057 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 22:11:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228846906] [2020-12-21 22:11:49,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:49,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680738702] [2020-12-21 22:11:49,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:49,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:49,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060453983] [2020-12-21 22:11:49,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:49,059 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-21 22:11:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:49,263 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-21 22:11:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:49,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-21 22:11:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:49,265 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:11:49,265 INFO L226 Difference]: Without dead ends: 323 [2020-12-21 22:11:49,266 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 22:11:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-21 22:11:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-21 22:11:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:11:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-21 22:11:49,294 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-21 22:11:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:49,295 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-21 22:11:49,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-21 22:11:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:11:49,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:49,296 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:49,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:49,502 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-21 22:11:49,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:49,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440304654] [2020-12-21 22:11:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:49,529 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:49,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325722075] [2020-12-21 22:11:49,530 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 22:11:49,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:11:49,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:52,013 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 22:11:52,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440304654] [2020-12-21 22:11:52,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:52,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325722075] [2020-12-21 22:11:52,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:52,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-21 22:11:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474440213] [2020-12-21 22:11:52,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 22:11:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 22:11:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 22:11:52,016 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-21 22:11:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:56,083 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-21 22:11:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:11:56,084 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 22:11:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:56,094 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:11:56,094 INFO L226 Difference]: Without dead ends: 2089 [2020-12-21 22:11:56,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:11:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-21 22:11:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-21 22:11:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:11:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-21 22:11:56,139 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-21 22:11:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:56,139 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-21 22:11:56,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 22:11:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-21 22:11:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 22:11:56,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:56,140 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:56,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:56,356 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-21 22:11:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:56,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432127454] [2020-12-21 22:11:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:56,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:56,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956752095] [2020-12-21 22:11:56,387 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