/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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:45,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:45,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:45,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:45,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:45,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:45,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:45,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:45,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:45,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:45,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:45,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:10:45,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:10:45,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:10:45,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:10:45,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:45,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:45,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:45,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:45,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:45,985 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:45,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:45,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:45,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:45,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:45,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:45,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:45,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:45,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:45,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:45,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:45,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:45,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:45,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:45,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:45,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:45,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:45,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:45,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:45,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:45,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:45,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:46,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:46,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:46,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:46,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:46,578 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:46,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_3.c [2020-12-21 22:10:46,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58c59154/646ac579c90948e89417d568e1dce748/FLAGeb42bd084 [2020-12-21 22:10:47,482 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:47,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_3.c [2020-12-21 22:10:47,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58c59154/646ac579c90948e89417d568e1dce748/FLAGeb42bd084 [2020-12-21 22:10:47,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58c59154/646ac579c90948e89417d568e1dce748 [2020-12-21 22:10:47,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:47,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:47,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:47,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:47,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:47,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:47" (1/1) ... [2020-12-21 22:10:47,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd0c59f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:47, skipping insertion in model container [2020-12-21 22:10:47,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:47" (1/1) ... [2020-12-21 22:10:47,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:47,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:48,043 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_3.c[323,336] [2020-12-21 22:10:48,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:48,081 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:48,099 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_3.c[323,336] [2020-12-21 22:10:48,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:48,130 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:48,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48 WrapperNode [2020-12-21 22:10:48,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:48,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:48,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:48,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:48,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:48,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:48,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:48,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:48,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... [2020-12-21 22:10:48,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:48,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:48,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:48,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:48,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:48,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:48,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:48,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:48,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:48,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:48,838 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:10:48,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:48 BoogieIcfgContainer [2020-12-21 22:10:48,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:48,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:48,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:48,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:47" (1/3) ... [2020-12-21 22:10:48,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e862f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:48, skipping insertion in model container [2020-12-21 22:10:48,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:48" (2/3) ... [2020-12-21 22:10:48,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e862f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:48, skipping insertion in model container [2020-12-21 22:10:48,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:48" (3/3) ... [2020-12-21 22:10:48,891 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2020-12-21 22:10:48,906 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:48,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:48,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:48,985 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:48,986 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:48,986 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:48,986 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:48,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:48,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:48,987 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:48,987 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:10:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:49,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:49,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:49,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-21 22:10:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:49,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627762683] [2020-12-21 22:10:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:49,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627762683] [2020-12-21 22:10:49,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:49,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260651116] [2020-12-21 22:10:49,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:49,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:49,369 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 22:10:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:49,408 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-21 22:10:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:49,412 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:10:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:49,436 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:10:49,447 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:10:49,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:10:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:10:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:10:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-21 22:10:49,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-21 22:10:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:49,506 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-21 22:10:49,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-21 22:10:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:49,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:49,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:49,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:49,512 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-21 22:10:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783305074] [2020-12-21 22:10:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:49,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783305074] [2020-12-21 22:10:49,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:49,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316695154] [2020-12-21 22:10:49,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:49,734 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-21 22:10:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:49,875 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-21 22:10:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:49,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-21 22:10:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:49,878 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:10:49,878 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:10:49,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:10:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-21 22:10:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:10:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:10:49,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 22:10:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:49,888 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:10:49,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:10:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:49,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:49,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:49,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-21 22:10:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:49,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112133390] [2020-12-21 22:10:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:50,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112133390] [2020-12-21 22:10:50,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725237130] [2020-12-21 22:10:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:50,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:50,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:50,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:10:50,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247413334] [2020-12-21 22:10:50,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:50,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:50,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:50,254 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-21 22:10:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:50,347 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-21 22:10:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:50,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 22:10:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:50,350 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:10:50,350 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:50,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 22:10:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:10:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:10:50,367 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-21 22:10:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:50,367 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:10:50,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:10:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:10:50,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:50,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:50,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:50,571 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-21 22:10:50,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:50,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668193078] [2020-12-21 22:10:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:50,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668193078] [2020-12-21 22:10:50,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259161381] [2020-12-21 22:10:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:50,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:10:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:50,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:10:50,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:50,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:50,848 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:10:50,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-21 22:10:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850595394] [2020-12-21 22:10:50,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:10:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:50,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:10:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:50,868 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:10:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:50,980 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:10:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:10:50,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:10:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:50,982 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:10:50,982 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:50,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:10:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:10:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:10:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 22:10:50,992 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-21 22:10:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:51,009 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 22:10:51,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:10:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 22:10:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:10:51,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:51,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:51,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:51,229 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-21 22:10:51,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:51,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127114806] [2020-12-21 22:10:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127114806] [2020-12-21 22:10:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035591981] [2020-12-21 22:10:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:51,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:51,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:51,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337659719] [2020-12-21 22:10:51,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:51,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:51,574 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-21 22:10:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:51,704 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-21 22:10:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:51,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 22:10:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:51,707 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:10:51,710 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:10:51,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:51,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:10:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-21 22:10:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:10:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 22:10:51,733 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-21 22:10:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:51,734 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 22:10:51,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 22:10:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:10:51,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:51,739 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:51,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:51,954 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:51,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-21 22:10:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540820021] [2020-12-21 22:10:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:52,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540820021] [2020-12-21 22:10:52,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364181932] [2020-12-21 22:10:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:52,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:52,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:52,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:10:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589628718] [2020-12-21 22:10:52,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:52,278 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-21 22:10:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:52,420 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-21 22:10:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:10:52,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 22:10:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:52,423 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:10:52,423 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:10:52,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:10:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-21 22:10:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:10:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-21 22:10:52,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-21 22:10:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:52,435 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-21 22:10:52,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-21 22:10:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:10:52,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:52,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:52,652 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-21 22:10:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:52,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930978057] [2020-12-21 22:10:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:52,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930978057] [2020-12-21 22:10:52,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945549479] [2020-12-21 22:10:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:52,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-21 22:10:52,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:52,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-21 22:10:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050401207] [2020-12-21 22:10:52,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:52,966 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-21 22:10:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:53,088 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-21 22:10:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:53,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 22:10:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:53,090 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:10:53,090 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:10:53,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:10:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-21 22:10:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:10:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-21 22:10:53,100 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-21 22:10:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:53,100 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-21 22:10:53,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-21 22:10:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:10:53,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:53,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:53,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:10:53,318 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-21 22:10:53,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:53,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838584543] [2020-12-21 22:10:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:53,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:53,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964932097] [2020-12-21 22:10:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:53,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:10:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:53,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838584543] [2020-12-21 22:10:53,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:53,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964932097] [2020-12-21 22:10:53,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:53,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:53,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137191951] [2020-12-21 22:10:53,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:53,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:53,595 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-21 22:10:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:53,764 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-21 22:10:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:53,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:10:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:53,767 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:10:53,767 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:10:53,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:10:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-21 22:10:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:10:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-21 22:10:53,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-21 22:10:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:53,780 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-21 22:10:53,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-21 22:10:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:53,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:53,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:53,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:53,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:53,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-21 22:10:53,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:53,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427790318] [2020-12-21 22:10:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:54,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:54,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80633230] [2020-12-21 22:10:54,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:10:54,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:54,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427790318] [2020-12-21 22:10:54,307 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:54,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80633230] [2020-12-21 22:10:54,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:54,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:54,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350833625] [2020-12-21 22:10:54,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:54,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:54,310 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-21 22:10:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:54,520 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-21 22:10:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:54,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-21 22:10:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:54,523 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:10:54,523 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:10:54,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:10:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-21 22:10:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:10:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 22:10:54,541 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-21 22:10:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:54,542 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 22:10:54,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 22:10:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:10:54,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:54,544 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:54,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:54,759 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:54,761 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-21 22:10:54,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:54,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948855587] [2020-12-21 22:10:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:54,782 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596224863] [2020-12-21 22:10:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:54,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:10:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:55,004 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:55,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 22:10:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948855587] [2020-12-21 22:10:55,028 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596224863] [2020-12-21 22:10:55,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:55,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:10:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519327376] [2020-12-21 22:10:55,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:10:55,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:10:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:10:55,031 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-12-21 22:10:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:55,184 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-21 22:10:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:55,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:10:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:55,186 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:10:55,186 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:10:55,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:10:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-21 22:10:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:10:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-21 22:10:55,196 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-21 22:10:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:55,197 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-21 22:10:55,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:10:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-21 22:10:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:10:55,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:55,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:55,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:10:55,414 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-21 22:10:55,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:55,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530735286] [2020-12-21 22:10:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:55,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:55,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409383396] [2020-12-21 22:10:55,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:55,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:55,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:10:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:55,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530735286] [2020-12-21 22:10:55,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409383396] [2020-12-21 22:10:55,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:55,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177211911] [2020-12-21 22:10:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:10:55,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:10:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:10:55,798 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-21 22:10:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:56,189 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-21 22:10:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:56,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-21 22:10:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:56,191 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:10:56,192 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:10:56,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:10:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:10:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-21 22:10:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:10:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-21 22:10:56,206 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-21 22:10:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:56,206 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-21 22:10:56,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:10:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-21 22:10:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:10:56,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:56,208 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:56,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:56,423 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-21 22:10:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:56,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274926430] [2020-12-21 22:10:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:56,459 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:56,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409344368] [2020-12-21 22:10:56,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:56,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:10:56,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:56,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:10:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:10:57,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274926430] [2020-12-21 22:10:57,012 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:57,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409344368] [2020-12-21 22:10:57,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:57,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:57,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898248412] [2020-12-21 22:10:57,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:57,021 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-21 22:10:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:57,303 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-21 22:10:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:57,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:10:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:57,307 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:10:57,308 INFO L226 Difference]: Without dead ends: 283 [2020-12-21 22:10:57,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-21 22:10:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-21 22:10:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:10:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 22:10:57,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-21 22:10:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:57,332 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 22:10:57,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 22:10:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:10:57,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:57,336 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:57,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:57,538 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-21 22:10:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031445134] [2020-12-21 22:10:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:57,558 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:57,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649447739] [2020-12-21 22:10:57,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:57,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:10:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:10:57,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 22:10:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031445134] [2020-12-21 22:10:57,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:57,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649447739] [2020-12-21 22:10:57,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:57,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:57,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484762073] [2020-12-21 22:10:57,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:57,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:57,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:57,835 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-21 22:10:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:57,992 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:10:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:57,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:10:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:57,994 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:10:57,994 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:10:57,995 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 22:10:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:10:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:10:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:10:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-21 22:10:58,005 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-21 22:10:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:58,005 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-21 22:10:58,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-21 22:10:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:10:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:58,007 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:58,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:10:58,221 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-21 22:10:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:58,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265055586] [2020-12-21 22:10:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:58,240 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:58,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150249292] [2020-12-21 22:10:58,240 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 22:10:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:10:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:58,639 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 22:10:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265055586] [2020-12-21 22:10:58,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150249292] [2020-12-21 22:10:58,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:58,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:10:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597697855] [2020-12-21 22:10:58,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:10:58,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:10:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:58,642 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-21 22:10:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:58,877 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-21 22:10:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:10:58,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-21 22:10:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:58,880 INFO L225 Difference]: With dead ends: 450 [2020-12-21 22:10:58,880 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 22:10:58,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 22:10:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-21 22:10:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:10:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-21 22:10:58,892 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-21 22:10:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:58,893 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-21 22:10:58,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:10:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-21 22:10:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:10:58,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:58,894 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:59,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:10:59,109 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:59,110 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-21 22:10:59,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:59,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470768389] [2020-12-21 22:10:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:59,143 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:59,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137222278] [2020-12-21 22:10:59,143 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 22:10:59,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:59,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:59,644 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 22:10:59,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470768389] [2020-12-21 22:10:59,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:59,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137222278] [2020-12-21 22:10:59,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:59,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:10:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652616426] [2020-12-21 22:10:59,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:10:59,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:10:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:10:59,655 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-21 22:10:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:59,985 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-21 22:10:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:10:59,986 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 22:10:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:59,989 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:10:59,989 INFO L226 Difference]: Without dead ends: 504 [2020-12-21 22:10:59,995 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 22:10:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-21 22:11:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-21 22:11:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:11:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 22:11:00,009 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-21 22:11:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:00,009 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 22:11:00,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:11:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 22:11:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:11:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:00,014 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:00,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:11:00,228 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-21 22:11:00,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:00,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584883860] [2020-12-21 22:11:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:00,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:00,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568963317] [2020-12-21 22:11:00,257 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 22:11:00,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:11:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:11:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:00,549 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 22:11:00,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584883860] [2020-12-21 22:11:00,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:00,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568963317] [2020-12-21 22:11:00,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:00,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:11:00,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290983084] [2020-12-21 22:11:00,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:00,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:00,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:00,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:00,551 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-21 22:11:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:00,703 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-21 22:11:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:00,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-21 22:11:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:00,705 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:11:00,705 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:11:00,706 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 22:11:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:11:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 22:11:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:11:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-21 22:11:00,714 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-21 22:11:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:00,714 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-21 22:11:00,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-21 22:11:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:11:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:00,715 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:00,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:00,930 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-21 22:11:00,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:00,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407164088] [2020-12-21 22:11:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:00,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:00,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525841262] [2020-12-21 22:11:00,948 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 22:11:01,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:11:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:01,592 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 22:11:01,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407164088] [2020-12-21 22:11:01,593 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:01,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525841262] [2020-12-21 22:11:01,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:01,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559794284] [2020-12-21 22:11:01,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:11:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:11:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:11:01,596 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-21 22:11:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:02,377 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-21 22:11:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:11:02,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-21 22:11:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:02,381 INFO L225 Difference]: With dead ends: 580 [2020-12-21 22:11:02,382 INFO L226 Difference]: Without dead ends: 547 [2020-12-21 22:11:02,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:11:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-21 22:11:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-21 22:11:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:11:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-21 22:11:02,398 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-21 22:11:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:02,398 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-21 22:11:02,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:11:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-21 22:11:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:11:02,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:02,399 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:02,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:11:02,613 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-21 22:11:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:02,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138454152] [2020-12-21 22:11:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:02,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343938707] [2020-12-21 22:11:02,633 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 22:11:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:11:03,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:03,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:11:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:03,793 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 22:11:03,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138454152] [2020-12-21 22:11:03,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:03,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343938707] [2020-12-21 22:11:03,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:03,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:11:03,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137823963] [2020-12-21 22:11:03,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:11:03,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:03,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:11:03,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:11:03,796 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-21 22:11:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:04,260 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-21 22:11:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:11:04,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-21 22:11:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:04,265 INFO L225 Difference]: With dead ends: 757 [2020-12-21 22:11:04,265 INFO L226 Difference]: Without dead ends: 713 [2020-12-21 22:11:04,266 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 22:11:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-21 22:11:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-21 22:11:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:11:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-21 22:11:04,281 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-21 22:11:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:04,281 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-21 22:11:04,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:11:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-21 22:11:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:11:04,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:04,283 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:04,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:11:04,496 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-21 22:11:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:04,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621392045] [2020-12-21 22:11:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:04,517 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:04,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250776899] [2020-12-21 22:11:04,518 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 22:11:04,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:11:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:04,944 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 22:11:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621392045] [2020-12-21 22:11:04,945 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250776899] [2020-12-21 22:11:04,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:04,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:04,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229933713] [2020-12-21 22:11:04,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:04,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:04,947 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-21 22:11:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:05,128 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-21 22:11:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:05,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-21 22:11:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:05,132 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:11:05,132 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:11:05,132 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 22:11:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:11:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 22:11:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 22:11:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-21 22:11:05,148 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-21 22:11:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:05,148 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-21 22:11:05,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-21 22:11:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:05,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:05,150 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:05,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:05,365 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:05,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-21 22:11:05,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693184909] [2020-12-21 22:11:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:05,388 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338218363] [2020-12-21 22:11:05,389 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 22:11:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:11:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:06,239 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 22:11:06,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693184909] [2020-12-21 22:11:06,239 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:06,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338218363] [2020-12-21 22:11:06,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:06,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:11:06,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924860967] [2020-12-21 22:11:06,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:11:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:11:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:11:06,242 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-21 22:11:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:06,846 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-21 22:11:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:11:06,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-21 22:11:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:06,852 INFO L225 Difference]: With dead ends: 1003 [2020-12-21 22:11:06,852 INFO L226 Difference]: Without dead ends: 954 [2020-12-21 22:11:06,853 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 22:11:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-21 22:11:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-21 22:11:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:11:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-21 22:11:06,872 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-21 22:11:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:06,873 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-21 22:11:06,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:11:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-21 22:11:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 22:11:06,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:06,874 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:07,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:07,090 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-21 22:11:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:07,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990889469] [2020-12-21 22:11:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:07,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:07,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128614747] [2020-12-21 22:11:07,114 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 22:11:07,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:07,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:11:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:08,211 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 22:11:08,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990889469] [2020-12-21 22:11:08,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:08,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128614747] [2020-12-21 22:11:08,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:08,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:11:08,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414935255] [2020-12-21 22:11:08,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:11:08,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:11:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:11:08,214 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-21 22:11:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:08,927 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-21 22:11:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:11:08,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-21 22:11:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:08,934 INFO L225 Difference]: With dead ends: 1163 [2020-12-21 22:11:08,934 INFO L226 Difference]: Without dead ends: 1114 [2020-12-21 22:11:08,935 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 22:11:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-21 22:11:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-21 22:11:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:11:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-21 22:11:08,958 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-21 22:11:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:08,958 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-21 22:11:08,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:11:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-21 22:11:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 22:11:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:08,959 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:09,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:09,174 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-21 22:11:09,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:09,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639781729] [2020-12-21 22:11:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:09,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:09,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823174679] [2020-12-21 22:11:09,223 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 22:11:09,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:11:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:09,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:11:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:09,904 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 22:11:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639781729] [2020-12-21 22:11:09,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:09,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823174679] [2020-12-21 22:11:09,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:09,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:11:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319369816] [2020-12-21 22:11:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:11:09,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:11:09,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:09,911 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-21 22:11:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:10,125 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-21 22:11:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:11:10,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-21 22:11:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:10,128 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:11:10,128 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:11:10,128 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 22:11:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:11:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 22:11:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:11:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-21 22:11:10,144 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-21 22:11:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:10,145 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-21 22:11:10,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:11:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-21 22:11:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 22:11:10,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:10,146 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:11:10,357 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-21 22:11:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979075117] [2020-12-21 22:11:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:10,380 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:10,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378961501] [2020-12-21 22:11:10,381 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 22:11:10,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:11:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:11,557 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 22:11:11,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979075117] [2020-12-21 22:11:11,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:11,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378961501] [2020-12-21 22:11:11,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:11,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:11,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303752346] [2020-12-21 22:11:11,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:11:11,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:11:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:11:11,561 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-21 22:11:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:13,060 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-21 22:11:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:13,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-21 22:11:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:13,066 INFO L225 Difference]: With dead ends: 1247 [2020-12-21 22:11:13,067 INFO L226 Difference]: Without dead ends: 1204 [2020-12-21 22:11:13,068 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 22:11:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-21 22:11:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-21 22:11:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:11:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-21 22:11:13,092 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-21 22:11:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:13,093 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-21 22:11:13,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:11:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-21 22:11:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 22:11:13,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:13,094 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:13,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:11:13,300 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-21 22:11:13,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:13,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144177991] [2020-12-21 22:11:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:13,348 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647724640] [2020-12-21 22:11:13,349 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 22:11:18,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-21 22:11:18,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:19,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:11:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:20,074 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 22:11:20,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144177991] [2020-12-21 22:11:20,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:20,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647724640] [2020-12-21 22:11:20,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:20,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576960562] [2020-12-21 22:11:20,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:11:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:11:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:20,077 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-21 22:11:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:20,915 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-21 22:11:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:11:20,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-21 22:11:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:20,923 INFO L225 Difference]: With dead ends: 1515 [2020-12-21 22:11:20,924 INFO L226 Difference]: Without dead ends: 1458 [2020-12-21 22:11:20,924 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 22:11:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-21 22:11:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-21 22:11:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:11:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-21 22:11:20,955 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-21 22:11:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:20,955 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-21 22:11:20,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:11:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-21 22:11:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 22:11:20,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:20,956 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:21,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:21,172 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-21 22:11:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:21,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829538095] [2020-12-21 22:11:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:21,196 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:21,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743291777] [2020-12-21 22:11:21,197 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 22:11:21,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:11:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:11:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:22,157 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 22:11:22,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829538095] [2020-12-21 22:11:22,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:22,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743291777] [2020-12-21 22:11:22,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:22,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:22,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534513327] [2020-12-21 22:11:22,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:22,160 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-21 22:11:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:22,410 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-21 22:11:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:22,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-21 22:11:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:22,412 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:11:22,412 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:11:22,413 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 22:11:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:11:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:11:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:11:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-21 22:11:22,438 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-21 22:11:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:22,439 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-21 22:11:22,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-21 22:11:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 22:11:22,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:22,440 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:22,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:22,645 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-21 22:11:22,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:22,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133721428] [2020-12-21 22:11:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:22,666 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:22,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495981096] [2020-12-21 22:11:22,667 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 22:11:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:11:22,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:24,190 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 22:11:24,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133721428] [2020-12-21 22:11:24,191 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:24,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495981096] [2020-12-21 22:11:24,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:24,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:11:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426639495] [2020-12-21 22:11:24,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:11:24,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:11:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:24,193 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-21 22:11:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:25,288 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-21 22:11:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:25,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-21 22:11:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:25,295 INFO L225 Difference]: With dead ends: 1906 [2020-12-21 22:11:25,295 INFO L226 Difference]: Without dead ends: 1844 [2020-12-21 22:11:25,296 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 22:11:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-21 22:11:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-21 22:11:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:11:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-21 22:11:25,330 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-21 22:11:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:25,330 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-21 22:11:25,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:11:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-21 22:11:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 22:11:25,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:25,332 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:25,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:25,546 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-21 22:11:25,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:25,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849795682] [2020-12-21 22:11:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:25,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:25,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703428743] [2020-12-21 22:11:25,569 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 22:11:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:25,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:11:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:27,440 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 22:11:27,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849795682] [2020-12-21 22:11:27,440 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:27,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703428743] [2020-12-21 22:11:27,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:27,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-21 22:11:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942563536] [2020-12-21 22:11:27,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:11:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:11:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:27,443 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-21 22:11:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:28,779 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-21 22:11:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:11:28,779 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-21 22:11:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:28,785 INFO L225 Difference]: With dead ends: 2156 [2020-12-21 22:11:28,785 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 22:11:28,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 22:11:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-21 22:11:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:11:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-21 22:11:28,822 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-21 22:11:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:28,823 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-21 22:11:28,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:11:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-21 22:11:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-21 22:11:28,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:28,824 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:29,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:29,040 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:29,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-21 22:11:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:29,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266834995] [2020-12-21 22:11:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:29,067 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:29,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888952660] [2020-12-21 22:11:29,068 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 22:11:29,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:11:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:29,730 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 22:11:29,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266834995] [2020-12-21 22:11:29,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888952660] [2020-12-21 22:11:29,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:29,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477586308] [2020-12-21 22:11:29,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:29,732 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-21 22:11:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:29,940 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-21 22:11:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:29,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-21 22:11:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:29,943 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:11:29,943 INFO L226 Difference]: Without dead ends: 323 [2020-12-21 22:11:29,943 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 22:11:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-21 22:11:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-21 22:11:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:11:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-21 22:11:29,980 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-21 22:11:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:29,981 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-21 22:11:29,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-21 22:11:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:11:29,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:29,982 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:30,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:30,196 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:30,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:30,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-21 22:11:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:30,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279362584] [2020-12-21 22:11:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:30,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:30,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503878126] [2020-12-21 22:11:30,222 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 22:11:30,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:30,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:30,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:11:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:32,515 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 22:11:32,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279362584] [2020-12-21 22:11:32,515 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:32,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503878126] [2020-12-21 22:11:32,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:32,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-21 22:11:32,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565292002] [2020-12-21 22:11:32,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 22:11:32,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 22:11:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 22:11:32,518 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-21 22:11:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:36,542 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-21 22:11:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:11:36,543 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 22:11:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:36,549 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:11:36,549 INFO L226 Difference]: Without dead ends: 2089 [2020-12-21 22:11:36,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:11:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-21 22:11:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-21 22:11:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:11:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-21 22:11:36,593 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-21 22:11:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:36,594 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-21 22:11:36,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 22:11:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-21 22:11:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 22:11:36,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:36,595 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:36,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:36,809 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-21 22:11:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:36,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469170141] [2020-12-21 22:11:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:36,834 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:36,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640508153] [2020-12-21 22:11:36,834 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