/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:29,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:29,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:29,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:29,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:29,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:29,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:29,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:29,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:29,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:29,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:29,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 22:10:29,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:10:29,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:10:29,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:10:29,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:30,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:30,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:30,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:30,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:30,031 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:30,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:30,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:30,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:30,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:30,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:30,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:30,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:30,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:30,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:30,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:30,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:30,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:30,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:30,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:30,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:30,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:30,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:30,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:30,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:30,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:30,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:30,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:30,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:30,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:30,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:30,572 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:30,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2020-12-21 22:10:30,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c350d3a23/68176bdc0ade48afbd930354a5b3af7c/FLAG1419ac2ab [2020-12-21 22:10:31,483 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:31,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2020-12-21 22:10:31,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c350d3a23/68176bdc0ade48afbd930354a5b3af7c/FLAG1419ac2ab [2020-12-21 22:10:31,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c350d3a23/68176bdc0ade48afbd930354a5b3af7c [2020-12-21 22:10:31,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:31,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:31,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:31,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:31,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:31,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:31" (1/1) ... [2020-12-21 22:10:31,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f4c494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:31, skipping insertion in model container [2020-12-21 22:10:31,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:31" (1/1) ... [2020-12-21 22:10:31,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:31,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:32,199 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_1.c[323,336] [2020-12-21 22:10:32,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:32,237 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:32,254 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_1.c[323,336] [2020-12-21 22:10:32,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:32,285 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:32,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32 WrapperNode [2020-12-21 22:10:32,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:32,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:32,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:32,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:32,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:32,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:32,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:32,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:32,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (1/1) ... [2020-12-21 22:10:32,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:32,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:32,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:32,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:32,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (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 22:10:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:32,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:32,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:32,824 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:10:32,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:32 BoogieIcfgContainer [2020-12-21 22:10:32,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:32,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:32,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:32,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:32,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:31" (1/3) ... [2020-12-21 22:10:32,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea28fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:32, skipping insertion in model container [2020-12-21 22:10:32,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:32" (2/3) ... [2020-12-21 22:10:32,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea28fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:32, skipping insertion in model container [2020-12-21 22:10:32,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:32" (3/3) ... [2020-12-21 22:10:32,839 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2020-12-21 22:10:32,848 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:32,852 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:32,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:32,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:32,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:32,919 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:32,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:32,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:32,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:32,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:32,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:10:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:32,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:32,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:32,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:32,955 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2020-12-21 22:10:32,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:32,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122975407] [2020-12-21 22:10:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,149 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 22:10:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122975407] [2020-12-21 22:10:33,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:33,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:33,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523276709] [2020-12-21 22:10:33,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:33,182 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-21 22:10:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:33,206 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-21 22:10:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:33,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:10:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:33,219 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:10:33,219 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:10:33,223 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 22:10:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:10:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 22:10:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:10:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-21 22:10:33,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2020-12-21 22:10:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:33,273 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-21 22:10:33,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-21 22:10:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:10:33,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:33,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:33,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:33,275 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:33,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2020-12-21 22:10:33,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:33,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180460348] [2020-12-21 22:10:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,404 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 22:10:33,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180460348] [2020-12-21 22:10:33,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:33,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371027586] [2020-12-21 22:10:33,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:33,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:33,416 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2020-12-21 22:10:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:33,535 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-12-21 22:10:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:33,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-21 22:10:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:33,538 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:10:33,538 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:10:33,539 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 22:10:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:10:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2020-12-21 22:10:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:10:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:10:33,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 22:10:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:33,548 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:10:33,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:10:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:33,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:33,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:33,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:33,550 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2020-12-21 22:10:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:33,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887300772] [2020-12-21 22:10:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,698 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 22:10:33,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887300772] [2020-12-21 22:10:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903610201] [2020-12-21 22:10:33,703 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 22:10:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:33,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:33,929 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 22:10:33,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:33,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:10:33,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491339167] [2020-12-21 22:10:33,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:33,934 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2020-12-21 22:10:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:34,055 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-12-21 22:10:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:34,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 22:10:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:34,058 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:10:34,058 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:34,061 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 22:10:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 22:10:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:10:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-21 22:10:34,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-21 22:10:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:34,078 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-21 22:10:34,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-21 22:10:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:10:34,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:34,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:34,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:34,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:34,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:34,296 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2020-12-21 22:10:34,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:34,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787329719] [2020-12-21 22:10:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:34,386 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 22:10:34,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787329719] [2020-12-21 22:10:34,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292991532] [2020-12-21 22:10:34,387 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 22:10:34,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:10:34,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:34,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:34,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:34,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:10:34,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:10:34,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:34,599 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-21 22:10:34,616 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 22:10:34,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:34,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-21 22:10:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645144522] [2020-12-21 22:10:34,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:10:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:10:34,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:34,621 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-12-21 22:10:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:34,728 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:10:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:10:34,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 22:10:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:34,731 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:10:34,731 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:10:34,735 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 22:10:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:10:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-21 22:10:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:10:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-21 22:10:34,745 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-12-21 22:10:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:34,745 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-21 22:10:34,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:10:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-21 22:10:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:10:34,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:34,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:34,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:34,961 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2020-12-21 22:10:34,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:34,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377772722] [2020-12-21 22:10:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,060 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 22:10:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377772722] [2020-12-21 22:10:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865828023] [2020-12-21 22:10:35,061 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 22:10:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:35,213 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 22:10:35,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:35,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139749956] [2020-12-21 22:10:35,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:35,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:35,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:35,217 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-12-21 22:10:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:35,313 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-12-21 22:10:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:35,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 22:10:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:35,316 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:10:35,316 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 22:10:35,317 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 22:10:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 22:10:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2020-12-21 22:10:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:10:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 22:10:35,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-12-21 22:10:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:35,326 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 22:10:35,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 22:10:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:10:35,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:35,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:35,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:35,544 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2020-12-21 22:10:35,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:35,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081557441] [2020-12-21 22:10:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:35,733 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 22:10:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081557441] [2020-12-21 22:10:35,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523750346] [2020-12-21 22:10:35,735 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 22:10:35,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:35,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:35,971 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 22:10:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:35,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:10:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10978492] [2020-12-21 22:10:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:35,984 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-12-21 22:10:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:36,137 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-21 22:10:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:10:36,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 22:10:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:36,146 INFO L225 Difference]: With dead ends: 113 [2020-12-21 22:10:36,147 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 22:10:36,148 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 22:10:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 22:10:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2020-12-21 22:10:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:10:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-21 22:10:36,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-12-21 22:10:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:36,173 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-21 22:10:36,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-21 22:10:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:10:36,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:36,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:36,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:36,394 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2020-12-21 22:10:36,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:36,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871569460] [2020-12-21 22:10:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:36,486 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 22:10:36,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871569460] [2020-12-21 22:10:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967882205] [2020-12-21 22:10:36,487 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 22:10:36,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:36,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:36,623 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 22:10:36,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:36,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-21 22:10:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37461263] [2020-12-21 22:10:36,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:36,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:36,627 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-12-21 22:10:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:36,700 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-12-21 22:10:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:36,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-21 22:10:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:36,701 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:10:36,702 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:10:36,702 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 22:10:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:10:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2020-12-21 22:10:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:10:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-21 22:10:36,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2020-12-21 22:10:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:36,710 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-21 22:10:36,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-21 22:10:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:10:36,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:36,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:36,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:10:36,926 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2020-12-21 22:10:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:36,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880529169] [2020-12-21 22:10:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:36,956 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:36,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538717442] [2020-12-21 22:10:36,957 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 22:10:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:10:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:37,168 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 22:10:37,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880529169] [2020-12-21 22:10:37,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538717442] [2020-12-21 22:10:37,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:37,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992282007] [2020-12-21 22:10:37,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:37,171 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-12-21 22:10:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:37,307 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-12-21 22:10:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:37,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 22:10:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:37,309 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:10:37,310 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:10:37,311 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 22:10:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:10:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2020-12-21 22:10:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:10:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-12-21 22:10:37,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-12-21 22:10:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:37,320 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-12-21 22:10:37,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-12-21 22:10:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:37,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:37,322 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:37,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:37,538 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2020-12-21 22:10:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:37,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978349635] [2020-12-21 22:10:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:37,560 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:37,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585569329] [2020-12-21 22:10:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:10:37,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:10:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:37,829 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 22:10:37,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978349635] [2020-12-21 22:10:37,830 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:37,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585569329] [2020-12-21 22:10:37,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:37,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:37,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380535119] [2020-12-21 22:10:37,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:37,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:37,833 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2020-12-21 22:10:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:38,020 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2020-12-21 22:10:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:38,020 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-21 22:10:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:38,022 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:10:38,022 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 22:10:38,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 22:10:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2020-12-21 22:10:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:10:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-12-21 22:10:38,032 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-12-21 22:10:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:38,033 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-12-21 22:10:38,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-12-21 22:10:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:10:38,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:38,034 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:38,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:38,250 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2020-12-21 22:10:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:38,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586616863] [2020-12-21 22:10:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:38,267 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:38,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080508604] [2020-12-21 22:10:38,267 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 22:10:38,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:10:38,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:10:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:38,451 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 22:10:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586616863] [2020-12-21 22:10:38,452 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080508604] [2020-12-21 22:10:38,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:38,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:10:38,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535837983] [2020-12-21 22:10:38,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:38,455 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2020-12-21 22:10:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:38,583 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-12-21 22:10:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:10:38,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-21 22:10:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:38,584 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:10:38,585 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:10:38,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:10:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-12-21 22:10:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:10:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-12-21 22:10:38,593 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-12-21 22:10:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:38,593 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-12-21 22:10:38,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-12-21 22:10:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:10:38,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:38,595 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:38,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:10:38,810 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2020-12-21 22:10:38,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:38,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985068954] [2020-12-21 22:10:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:38,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:38,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358149937] [2020-12-21 22:10:38,829 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 22:10:38,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:10:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:39,120 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 22:10:39,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985068954] [2020-12-21 22:10:39,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:39,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358149937] [2020-12-21 22:10:39,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:39,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519632743] [2020-12-21 22:10:39,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:10:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:10:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:10:39,124 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2020-12-21 22:10:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:39,434 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2020-12-21 22:10:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:39,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-21 22:10:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:39,436 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:10:39,436 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:10:39,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:10:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:10:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2020-12-21 22:10:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:10:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-12-21 22:10:39,447 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2020-12-21 22:10:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:39,447 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-12-21 22:10:39,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:10:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-12-21 22:10:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:10:39,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:39,448 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:39,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:39,662 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2020-12-21 22:10:39,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:39,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684741482] [2020-12-21 22:10:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:39,686 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:39,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524180472] [2020-12-21 22:10:39,690 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 22:10:40,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:10:40,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:10:40,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:40,380 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 22:10:40,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684741482] [2020-12-21 22:10:40,381 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:40,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524180472] [2020-12-21 22:10:40,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:40,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:10:40,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080655707] [2020-12-21 22:10:40,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:40,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:40,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:40,384 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2020-12-21 22:10:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:40,640 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2020-12-21 22:10:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:40,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 22:10:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:40,644 INFO L225 Difference]: With dead ends: 314 [2020-12-21 22:10:40,644 INFO L226 Difference]: Without dead ends: 283 [2020-12-21 22:10:40,645 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 22:10:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-21 22:10:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2020-12-21 22:10:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:10:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 22:10:40,656 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2020-12-21 22:10:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:40,657 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 22:10:40,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 22:10:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:10:40,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:40,658 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:40,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:40,863 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2020-12-21 22:10:40,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:40,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354680380] [2020-12-21 22:10:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:40,881 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:40,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859529729] [2020-12-21 22:10:40,882 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 22:10:40,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:10:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:10:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:41,157 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 22:10:41,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354680380] [2020-12-21 22:10:41,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:41,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859529729] [2020-12-21 22:10:41,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:41,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:10:41,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303088487] [2020-12-21 22:10:41,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:10:41,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:10:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:10:41,161 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2020-12-21 22:10:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:41,306 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-12-21 22:10:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:41,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:10:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:41,308 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:10:41,308 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:10:41,309 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 22:10:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:10:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:10:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:10:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-12-21 22:10:41,318 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-12-21 22:10:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:41,318 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-12-21 22:10:41,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:10:41,319 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-12-21 22:10:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:10:41,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:41,320 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:41,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:10:41,535 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2020-12-21 22:10:41,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:41,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310752601] [2020-12-21 22:10:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:41,554 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:41,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29841783] [2020-12-21 22:10:41,554 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 22:10:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:10:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:42,080 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 22:10:42,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310752601] [2020-12-21 22:10:42,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:42,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29841783] [2020-12-21 22:10:42,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:42,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:10:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433329098] [2020-12-21 22:10:42,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:10:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:10:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:42,084 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2020-12-21 22:10:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:42,414 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2020-12-21 22:10:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:10:42,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-12-21 22:10:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:42,418 INFO L225 Difference]: With dead ends: 450 [2020-12-21 22:10:42,419 INFO L226 Difference]: Without dead ends: 414 [2020-12-21 22:10:42,420 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 22:10:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-21 22:10:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2020-12-21 22:10:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 22:10:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-12-21 22:10:42,435 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2020-12-21 22:10:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-12-21 22:10:42,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:10:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-12-21 22:10:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:10:42,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:42,437 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:42,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:10:42,651 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2020-12-21 22:10:42,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:42,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406551293] [2020-12-21 22:10:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:42,688 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:42,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771051987] [2020-12-21 22:10:42,691 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 22:10:42,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:43,202 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 22:10:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406551293] [2020-12-21 22:10:43,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771051987] [2020-12-21 22:10:43,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:43,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:10:43,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585504786] [2020-12-21 22:10:43,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:10:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:10:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:10:43,206 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2020-12-21 22:10:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:43,595 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2020-12-21 22:10:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:10:43,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-21 22:10:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:43,599 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:10:43,599 INFO L226 Difference]: Without dead ends: 504 [2020-12-21 22:10:43,601 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 22:10:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-21 22:10:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2020-12-21 22:10:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:10:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-12-21 22:10:43,616 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2020-12-21 22:10:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:43,617 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-12-21 22:10:43,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:10:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-12-21 22:10:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:10:43,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:43,618 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:43,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:10:43,833 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2020-12-21 22:10:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:43,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447134124] [2020-12-21 22:10:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:43,855 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:43,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664712188] [2020-12-21 22:10:43,855 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 22:10:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:10:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:10:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:44,161 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 22:10:44,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447134124] [2020-12-21 22:10:44,162 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:44,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664712188] [2020-12-21 22:10:44,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:44,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:10:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317237586] [2020-12-21 22:10:44,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:10:44,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:10:44,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:44,165 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2020-12-21 22:10:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:44,325 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-12-21 22:10:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:10:44,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-12-21 22:10:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:44,328 INFO L225 Difference]: With dead ends: 100 [2020-12-21 22:10:44,328 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:10:44,329 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 22:10:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:10:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 22:10:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:10:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-12-21 22:10:44,339 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2020-12-21 22:10:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:44,339 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-12-21 22:10:44,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:10:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-12-21 22:10:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:10:44,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:44,341 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:44,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:44,554 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2020-12-21 22:10:44,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:44,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382200043] [2020-12-21 22:10:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:44,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:44,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644179314] [2020-12-21 22:10:44,574 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 22:10:44,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:44,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:10:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:45,213 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 22:10:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382200043] [2020-12-21 22:10:45,214 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644179314] [2020-12-21 22:10:45,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:45,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:10:45,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208769220] [2020-12-21 22:10:45,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:10:45,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:10:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:10:45,217 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2020-12-21 22:10:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:46,097 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2020-12-21 22:10:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:10:46,098 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-12-21 22:10:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:46,102 INFO L225 Difference]: With dead ends: 580 [2020-12-21 22:10:46,102 INFO L226 Difference]: Without dead ends: 547 [2020-12-21 22:10:46,104 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 22:10:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-21 22:10:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2020-12-21 22:10:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:10:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-12-21 22:10:46,118 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2020-12-21 22:10:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:46,119 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-12-21 22:10:46,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:10:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-12-21 22:10:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 22:10:46,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:46,120 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:10:46,335 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2020-12-21 22:10:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657474833] [2020-12-21 22:10:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:46,358 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:46,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330938500] [2020-12-21 22:10:46,358 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 22:10:47,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:10:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:10:47,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:47,669 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 22:10:47,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657474833] [2020-12-21 22:10:47,670 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:47,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330938500] [2020-12-21 22:10:47,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:47,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:10:47,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082328390] [2020-12-21 22:10:47,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:10:47,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:10:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:10:47,672 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2020-12-21 22:10:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:48,146 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2020-12-21 22:10:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:10:48,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-12-21 22:10:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:48,151 INFO L225 Difference]: With dead ends: 757 [2020-12-21 22:10:48,152 INFO L226 Difference]: Without dead ends: 713 [2020-12-21 22:10:48,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:10:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-21 22:10:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2020-12-21 22:10:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:10:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-12-21 22:10:48,168 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2020-12-21 22:10:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:48,169 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-12-21 22:10:48,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:10:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-12-21 22:10:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:10:48,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:48,170 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:48,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:10:48,370 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2020-12-21 22:10:48,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:48,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123316259] [2020-12-21 22:10:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:48,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:48,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161039422] [2020-12-21 22:10:48,408 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 22:10:48,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:10:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:10:48,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:48,903 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 22:10:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123316259] [2020-12-21 22:10:48,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161039422] [2020-12-21 22:10:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:10:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074898274] [2020-12-21 22:10:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:10:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:10:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:10:48,906 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2020-12-21 22:10:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:49,102 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-12-21 22:10:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:10:49,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-12-21 22:10:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:49,105 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:10:49,105 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:10:49,106 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 22:10:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:10:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-12-21 22:10:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 22:10:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-12-21 22:10:49,117 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2020-12-21 22:10:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:49,117 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-12-21 22:10:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:10:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-12-21 22:10:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:10:49,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:49,119 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:49,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:49,335 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2020-12-21 22:10:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84100458] [2020-12-21 22:10:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:49,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:49,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341830186] [2020-12-21 22:10:49,355 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 22:10:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:10:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:50,220 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 22:10:50,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84100458] [2020-12-21 22:10:50,221 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:50,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341830186] [2020-12-21 22:10:50,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:50,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:10:50,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650100134] [2020-12-21 22:10:50,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:10:50,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:50,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:10:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:10:50,224 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2020-12-21 22:10:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:50,832 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2020-12-21 22:10:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:10:50,833 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-12-21 22:10:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:50,838 INFO L225 Difference]: With dead ends: 1003 [2020-12-21 22:10:50,838 INFO L226 Difference]: Without dead ends: 954 [2020-12-21 22:10:50,839 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 22:10:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-12-21 22:10:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2020-12-21 22:10:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:10:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2020-12-21 22:10:50,859 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2020-12-21 22:10:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:50,859 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2020-12-21 22:10:50,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:10:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2020-12-21 22:10:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-21 22:10:50,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:50,860 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:51,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:51,074 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2020-12-21 22:10:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:51,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272123073] [2020-12-21 22:10:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:51,095 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:51,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132383742] [2020-12-21 22:10:51,095 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 22:10:51,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:10:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:52,146 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 22:10:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272123073] [2020-12-21 22:10:52,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132383742] [2020-12-21 22:10:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:52,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:10:52,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887430877] [2020-12-21 22:10:52,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:10:52,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:10:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:10:52,149 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2020-12-21 22:10:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:52,837 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2020-12-21 22:10:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:10:52,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-21 22:10:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:52,844 INFO L225 Difference]: With dead ends: 1163 [2020-12-21 22:10:52,844 INFO L226 Difference]: Without dead ends: 1114 [2020-12-21 22:10:52,845 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 22:10:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-21 22:10:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2020-12-21 22:10:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:10:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2020-12-21 22:10:52,867 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2020-12-21 22:10:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:52,867 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2020-12-21 22:10:52,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:10:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2020-12-21 22:10:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 22:10:52,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:52,868 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:53,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:53,082 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2020-12-21 22:10:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:53,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751867074] [2020-12-21 22:10:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:53,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:53,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545905595] [2020-12-21 22:10:53,105 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 22:10:53,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:10:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:10:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:53,654 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 22:10:53,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751867074] [2020-12-21 22:10:53,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:53,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545905595] [2020-12-21 22:10:53,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:53,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:10:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936323908] [2020-12-21 22:10:53,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:10:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:53,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:10:53,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:10:53,657 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2020-12-21 22:10:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:53,884 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-12-21 22:10:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:10:53,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-21 22:10:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:53,886 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:10:53,887 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 22:10:53,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:10:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 22:10:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 22:10:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 22:10:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-12-21 22:10:53,903 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2020-12-21 22:10:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:53,904 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-12-21 22:10:53,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:10:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-12-21 22:10:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 22:10:53,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:53,905 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:54,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:10:54,119 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2020-12-21 22:10:54,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:54,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96460661] [2020-12-21 22:10:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:54,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:54,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676484679] [2020-12-21 22:10:54,140 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 22:10:54,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:54,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:10:54,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:55,485 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 22:10:55,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96460661] [2020-12-21 22:10:55,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:10:55,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676484679] [2020-12-21 22:10:55,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:55,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:10:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686020645] [2020-12-21 22:10:55,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:10:55,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:10:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:10:55,489 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2020-12-21 22:10:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:56,985 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2020-12-21 22:10:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:10:56,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-12-21 22:10:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:56,992 INFO L225 Difference]: With dead ends: 1247 [2020-12-21 22:10:56,992 INFO L226 Difference]: Without dead ends: 1204 [2020-12-21 22:10:56,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:10:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-21 22:10:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2020-12-21 22:10:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:10:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2020-12-21 22:10:57,017 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2020-12-21 22:10:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:57,017 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2020-12-21 22:10:57,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:10:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2020-12-21 22:10:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-21 22:10:57,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:57,018 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:57,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:10:57,233 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2020-12-21 22:10:57,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:57,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771441691] [2020-12-21 22:10:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:57,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:10:57,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169687833] [2020-12-21 22:10:57,258 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 22:11:06,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2020-12-21 22:11:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 22:11:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:07,372 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 22:11:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771441691] [2020-12-21 22:11:07,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169687833] [2020-12-21 22:11:07,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:07,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-21 22:11:07,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205760040] [2020-12-21 22:11:07,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:11:07,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:11:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:07,375 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2020-12-21 22:11:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:08,294 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2020-12-21 22:11:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:11:08,296 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-21 22:11:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:08,302 INFO L225 Difference]: With dead ends: 1515 [2020-12-21 22:11:08,303 INFO L226 Difference]: Without dead ends: 1458 [2020-12-21 22:11:08,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:11:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-12-21 22:11:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2020-12-21 22:11:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 22:11:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-12-21 22:11:08,330 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2020-12-21 22:11:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:08,331 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-12-21 22:11:08,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:11:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-12-21 22:11:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 22:11:08,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:08,332 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:08,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:08,546 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2020-12-21 22:11:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:08,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320079229] [2020-12-21 22:11:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:08,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:08,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604481421] [2020-12-21 22:11:08,570 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 22:11:08,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:11:08,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:11:08,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:09,237 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 22:11:09,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320079229] [2020-12-21 22:11:09,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:09,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604481421] [2020-12-21 22:11:09,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:09,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077462570] [2020-12-21 22:11:09,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:09,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:09,239 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2020-12-21 22:11:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:09,480 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-12-21 22:11:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:09,481 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-12-21 22:11:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:09,482 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:11:09,482 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:11:09,482 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 22:11:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:11:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:11:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:11:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2020-12-21 22:11:09,504 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2020-12-21 22:11:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:09,504 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2020-12-21 22:11:09,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2020-12-21 22:11:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 22:11:09,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:09,505 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:09,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:09,719 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:09,719 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2020-12-21 22:11:09,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:09,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024359831] [2020-12-21 22:11:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:09,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:09,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779621389] [2020-12-21 22:11:09,745 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 22:11:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:11:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:11,316 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 22:11:11,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024359831] [2020-12-21 22:11:11,316 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:11,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779621389] [2020-12-21 22:11:11,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:11,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:11:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789227580] [2020-12-21 22:11:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:11:11,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:11:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:11,319 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2020-12-21 22:11:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:12,385 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2020-12-21 22:11:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:11:12,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-21 22:11:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:12,393 INFO L225 Difference]: With dead ends: 1906 [2020-12-21 22:11:12,393 INFO L226 Difference]: Without dead ends: 1844 [2020-12-21 22:11:12,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:11:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-21 22:11:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2020-12-21 22:11:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:11:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2020-12-21 22:11:12,429 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2020-12-21 22:11:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:12,430 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2020-12-21 22:11:12,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:11:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2020-12-21 22:11:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-21 22:11:12,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:12,431 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:12,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:12,645 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2020-12-21 22:11:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637960419] [2020-12-21 22:11:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:12,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713410732] [2020-12-21 22:11:12,670 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 22:11:12,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:11:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:14,648 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 22:11:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637960419] [2020-12-21 22:11:14,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713410732] [2020-12-21 22:11:14,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:14,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-21 22:11:14,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896616120] [2020-12-21 22:11:14,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 22:11:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 22:11:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:14,652 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2020-12-21 22:11:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,894 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2020-12-21 22:11:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 22:11:15,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2020-12-21 22:11:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,904 INFO L225 Difference]: With dead ends: 2156 [2020-12-21 22:11:15,904 INFO L226 Difference]: Without dead ends: 2094 [2020-12-21 22:11:15,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:11:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-21 22:11:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2020-12-21 22:11:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:11:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-12-21 22:11:15,942 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2020-12-21 22:11:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,942 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-12-21 22:11:15,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 22:11:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-12-21 22:11:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-21 22:11:15,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,943 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:16,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:16,159 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2020-12-21 22:11:16,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:16,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666858798] [2020-12-21 22:11:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:16,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:16,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38076660] [2020-12-21 22:11:16,199 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 22:11:16,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:11:16,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:16,847 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 22:11:16,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666858798] [2020-12-21 22:11:16,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:16,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38076660] [2020-12-21 22:11:16,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344788380] [2020-12-21 22:11:16,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:16,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:16,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:16,851 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2020-12-21 22:11:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:17,083 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2020-12-21 22:11:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:17,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2020-12-21 22:11:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:17,086 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:11:17,087 INFO L226 Difference]: Without dead ends: 323 [2020-12-21 22:11:17,087 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 22:11:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-21 22:11:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2020-12-21 22:11:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:11:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-12-21 22:11:17,116 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2020-12-21 22:11:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:17,117 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-12-21 22:11:17,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-12-21 22:11:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:11:17,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:17,118 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:17,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:17,333 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2020-12-21 22:11:17,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:17,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624847737] [2020-12-21 22:11:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:17,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:17,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056401173] [2020-12-21 22:11:17,362 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 22:11:17,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:17,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:17,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:11:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:19,906 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 22:11:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624847737] [2020-12-21 22:11:19,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056401173] [2020-12-21 22:11:19,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:19,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-21 22:11:19,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299389775] [2020-12-21 22:11:19,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 22:11:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 22:11:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 22:11:19,910 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2020-12-21 22:11:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:23,865 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2020-12-21 22:11:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 22:11:23,866 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 22:11:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:23,873 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:11:23,873 INFO L226 Difference]: Without dead ends: 2089 [2020-12-21 22:11:23,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:11:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-21 22:11:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2020-12-21 22:11:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:11:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2020-12-21 22:11:23,933 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2020-12-21 22:11:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:23,933 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2020-12-21 22:11:23,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 22:11:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2020-12-21 22:11:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-21 22:11:23,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:23,935 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:24,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:24,150 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2020-12-21 22:11:24,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460244317] [2020-12-21 22:11:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:24,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:24,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808772939] [2020-12-21 22:11:24,176 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