/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_limited_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:11:55,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:11:55,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:11:55,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:11:55,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:11:55,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:11:55,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:11:55,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:11:55,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:11:55,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:11:55,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:11:55,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:11:55,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:11:55,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:11:55,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:11:55,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:11:55,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:11:55,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:11:55,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:11:55,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:11:55,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:11:55,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:11:55,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:11:55,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:11:55,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:11:55,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:11:55,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:11:55,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:11:55,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:11:55,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:11:55,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:11:55,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:11:55,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:11:55,845 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:11:55,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:11:55,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:11:55,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:11:55,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:11:55,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:11:55,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:11:55,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:11:55,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:11:55,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:11:55,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:11:55,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:11:55,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:11:55,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:11:55,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:11:55,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:11:55,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:11:55,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:11:55,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:11:55,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:11:55,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:11:55,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:11:56,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:11:56,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:11:56,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:11:56,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:11:56,434 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:11:56,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2020-12-21 22:11:56,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2201cc72a/3673e90ab0984a90b622c382cec0eea1/FLAG6c35d441b [2020-12-21 22:11:57,289 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:11:57,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2020-12-21 22:11:57,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2201cc72a/3673e90ab0984a90b622c382cec0eea1/FLAG6c35d441b [2020-12-21 22:11:57,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2201cc72a/3673e90ab0984a90b622c382cec0eea1 [2020-12-21 22:11:57,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:11:57,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:11:57,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:57,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:11:57,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:11:57,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:57,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aff31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57, skipping insertion in model container [2020-12-21 22:11:57,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:57,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:11:57,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:11:57,838 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_limited_2.c[331,344] [2020-12-21 22:11:57,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:57,893 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:11:57,917 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_limited_2.c[331,344] [2020-12-21 22:11:57,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:57,988 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:11:57,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57 WrapperNode [2020-12-21 22:11:57,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:57,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:57,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:11:57,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:11:58,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:58,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:11:58,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:11:58,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:11:58,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... [2020-12-21 22:11:58,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:11:58,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:11:58,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:11:58,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:11:58,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:11:58,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:11:58,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:11:58,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:11:58,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:11:58,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:11:58,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:11:59,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:11:59,013 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:11:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:59 BoogieIcfgContainer [2020-12-21 22:11:59,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:11:59,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:11:59,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:11:59,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:11:59,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:11:57" (1/3) ... [2020-12-21 22:11:59,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c8419a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:59, skipping insertion in model container [2020-12-21 22:11:59,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:57" (2/3) ... [2020-12-21 22:11:59,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c8419a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:59, skipping insertion in model container [2020-12-21 22:11:59,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:59" (3/3) ... [2020-12-21 22:11:59,050 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2020-12-21 22:11:59,071 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:11:59,080 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:11:59,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:11:59,169 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:11:59,172 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:11:59,172 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:11:59,173 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:11:59,173 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:11:59,173 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:11:59,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:11:59,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:11:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:11:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:11:59,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:59,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:59,213 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:11:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:59,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370356754] [2020-12-21 22:11:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:59,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:59,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490374381] [2020-12-21 22:11:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:11:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:11:59,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370356754] [2020-12-21 22:11:59,605 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:59,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490374381] [2020-12-21 22:11:59,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:59,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:11:59,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650466842] [2020-12-21 22:11:59,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:11:59,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:11:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:11:59,637 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:11:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:59,659 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:11:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:11:59,661 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:11:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:59,673 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:11:59,673 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:11:59,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:11:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:11:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:11:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:11:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:11:59,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:11:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:59,727 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:11:59,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:11:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:11:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:11:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:59,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:59,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:11:59,943 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:11:59,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:59,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695005146] [2020-12-21 22:11:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:59,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:59,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860456625] [2020-12-21 22:11:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:12:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:00,135 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 22:12:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695005146] [2020-12-21 22:12:00,136 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:00,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860456625] [2020-12-21 22:12:00,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:00,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:12:00,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260336948] [2020-12-21 22:12:00,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:12:00,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:12:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:12:00,142 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:12:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:00,230 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-21 22:12:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:12:00,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:12:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:00,233 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:12:00,233 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:12:00,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 22:12:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:12:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-21 22:12:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:12:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:12:00,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 22:12:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:00,243 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:12:00,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:12:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:12:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:12:00,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:00,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:00,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:00,460 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-21 22:12:00,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:00,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103365487] [2020-12-21 22:12:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:00,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:00,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418221054] [2020-12-21 22:12:00,478 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 22:12:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:12:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:00,647 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 22:12:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103365487] [2020-12-21 22:12:00,648 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:00,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418221054] [2020-12-21 22:12:00,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:00,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:12:00,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958308366] [2020-12-21 22:12:00,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:12:00,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:12:00,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:00,652 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 22:12:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:00,764 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-21 22:12:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:12:00,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:12:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:00,766 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:12:00,767 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:12:00,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:12:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-12-21 22:12:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:12:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 22:12:00,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-21 22:12:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:00,783 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 22:12:00,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:12:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 22:12:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:12:00,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:00,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:00,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:01,000 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:01,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-12-21 22:12:01,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:01,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994569516] [2020-12-21 22:12:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:01,015 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:01,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401402597] [2020-12-21 22:12:01,016 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 22:12:01,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:12:01,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:12:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:12:01,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994569516] [2020-12-21 22:12:01,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:01,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401402597] [2020-12-21 22:12:01,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:01,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:12:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762363947] [2020-12-21 22:12:01,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:01,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:01,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:01,307 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-12-21 22:12:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:01,483 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:12:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:01,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:12:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:01,485 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:12:01,486 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:12:01,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:12:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-21 22:12:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:12:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 22:12:01,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-21 22:12:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:01,495 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 22:12:01,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 22:12:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:12:01,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:01,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:01,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:01,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-12-21 22:12:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:01,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461406886] [2020-12-21 22:12:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:01,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:01,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761456673] [2020-12-21 22:12:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:12:01,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:12:01,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461406886] [2020-12-21 22:12:01,918 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:01,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761456673] [2020-12-21 22:12:01,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:01,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:12:01,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030937766] [2020-12-21 22:12:01,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:01,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:01,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:01,922 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-21 22:12:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:02,060 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-12-21 22:12:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:02,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:12:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:02,064 INFO L225 Difference]: With dead ends: 89 [2020-12-21 22:12:02,064 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:12:02,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:12:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-12-21 22:12:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:12:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-21 22:12:02,075 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-12-21 22:12:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:02,075 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-21 22:12:02,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-21 22:12:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:12:02,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:02,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:02,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:02,292 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-12-21 22:12:02,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:02,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060096090] [2020-12-21 22:12:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:02,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775530677] [2020-12-21 22:12:02,309 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 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 22:12:02,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:12:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:12:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:12:02,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060096090] [2020-12-21 22:12:02,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:02,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775530677] [2020-12-21 22:12:02,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:12:02,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058706391] [2020-12-21 22:12:02,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:02,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:02,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:02,550 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-12-21 22:12:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:02,704 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-21 22:12:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:02,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-21 22:12:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:02,706 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:12:02,706 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:12:02,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:12:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-21 22:12:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:12:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-21 22:12:02,715 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-12-21 22:12:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:02,715 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-21 22:12:02,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-21 22:12:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:12:02,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:02,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:02,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:02,931 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2020-12-21 22:12:02,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805876767] [2020-12-21 22:12:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:02,959 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:02,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160575494] [2020-12-21 22:12:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:12:03,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805876767] [2020-12-21 22:12:03,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:03,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160575494] [2020-12-21 22:12:03,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:03,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:12:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693499070] [2020-12-21 22:12:03,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:03,250 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-12-21 22:12:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:03,400 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-12-21 22:12:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:12:03,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 22:12:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:03,403 INFO L225 Difference]: With dead ends: 127 [2020-12-21 22:12:03,404 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:12:03,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:12:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-12-21 22:12:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:12:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 22:12:03,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-12-21 22:12:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:03,414 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 22:12:03,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 22:12:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:12:03,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:03,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:03,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:03,632 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2020-12-21 22:12:03,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:03,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332716093] [2020-12-21 22:12:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:03,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:03,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964874101] [2020-12-21 22:12:03,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:03,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:03,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:12:03,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332716093] [2020-12-21 22:12:03,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:03,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964874101] [2020-12-21 22:12:03,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:03,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:03,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533340230] [2020-12-21 22:12:03,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:03,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:03,966 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-12-21 22:12:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:04,139 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-12-21 22:12:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:04,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 22:12:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:04,149 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:12:04,149 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:12:04,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:12:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-12-21 22:12:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:12:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-21 22:12:04,176 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-12-21 22:12:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:04,176 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-21 22:12:04,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-21 22:12:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:12:04,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:04,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:04,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:12:04,394 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:04,396 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2020-12-21 22:12:04,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:04,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831635382] [2020-12-21 22:12:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:04,419 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:04,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194487990] [2020-12-21 22:12:04,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:04,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:12:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:12:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 22:12:04,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831635382] [2020-12-21 22:12:04,759 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:04,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194487990] [2020-12-21 22:12:04,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:04,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:04,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609134887] [2020-12-21 22:12:04,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:04,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:04,765 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2020-12-21 22:12:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:04,931 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-21 22:12:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:04,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:12:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:04,932 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:12:04,933 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:12:04,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:12:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-21 22:12:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:12:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-21 22:12:04,942 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-12-21 22:12:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:04,943 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-21 22:12:04,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-21 22:12:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:12:04,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:04,945 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:05,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:05,161 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:05,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2020-12-21 22:12:05,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:05,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172016580] [2020-12-21 22:12:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:05,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:05,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150197832] [2020-12-21 22:12:05,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:05,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:12:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:05,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:05,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:05,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:05,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:05,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:05,388 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-21 22:12:05,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:05,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:05,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:05,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-21 22:12:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 22:12:05,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172016580] [2020-12-21 22:12:05,440 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:05,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150197832] [2020-12-21 22:12:05,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:05,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:12:05,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598437590] [2020-12-21 22:12:05,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:05,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:05,443 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2020-12-21 22:12:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:05,534 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-12-21 22:12:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:05,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 22:12:05,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:05,535 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:12:05,535 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:12:05,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:12:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-12-21 22:12:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:12:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 22:12:05,543 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-21 22:12:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:05,543 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 22:12:05,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 22:12:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:12:05,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:05,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:05,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:05,750 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2020-12-21 22:12:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:05,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350648154] [2020-12-21 22:12:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:05,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:05,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943041105] [2020-12-21 22:12:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:12:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:12:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350648154] [2020-12-21 22:12:05,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943041105] [2020-12-21 22:12:05,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:05,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:12:05,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965997529] [2020-12-21 22:12:05,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:12:05,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:12:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:05,979 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-12-21 22:12:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:06,141 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 22:12:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:06,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-21 22:12:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:06,143 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:12:06,143 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:12:06,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 22:12:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:12:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2020-12-21 22:12:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:12:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 22:12:06,152 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2020-12-21 22:12:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:06,152 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 22:12:06,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:12:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 22:12:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:12:06,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:06,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:06,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:12:06,368 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2020-12-21 22:12:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:06,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231279135] [2020-12-21 22:12:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:06,378 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:06,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318621501] [2020-12-21 22:12:06,379 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 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 22:12:06,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:06,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:06,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:12:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:12:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231279135] [2020-12-21 22:12:06,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:06,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318621501] [2020-12-21 22:12:06,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:06,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:12:06,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982268602] [2020-12-21 22:12:06,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:12:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:12:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:06,669 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2020-12-21 22:12:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:06,847 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2020-12-21 22:12:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:12:06,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 22:12:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:06,850 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:12:06,850 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 22:12:06,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 22:12:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2020-12-21 22:12:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:12:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 22:12:06,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2020-12-21 22:12:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:06,859 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 22:12:06,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:12:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 22:12:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:06,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:06,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:07,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:07,074 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2020-12-21 22:12:07,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:07,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674738749] [2020-12-21 22:12:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:07,085 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:07,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370137020] [2020-12-21 22:12:07,086 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 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 22:12:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:12:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:07,427 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:07,428 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:07,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:07,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:07,438 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:07,464 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:12:07,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:07,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:07,475 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:07,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:12:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 22:12:07,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674738749] [2020-12-21 22:12:07,551 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:07,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370137020] [2020-12-21 22:12:07,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:07,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:12:07,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815037945] [2020-12-21 22:12:07,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:07,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:07,554 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2020-12-21 22:12:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:07,714 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-12-21 22:12:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:07,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-21 22:12:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:07,717 INFO L225 Difference]: With dead ends: 136 [2020-12-21 22:12:07,717 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:12:07,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:12:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-12-21 22:12:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:12:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-21 22:12:07,727 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2020-12-21 22:12:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:07,727 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-21 22:12:07,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-21 22:12:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:07,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:07,729 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:07,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:12:07,938 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2020-12-21 22:12:07,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:07,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42674197] [2020-12-21 22:12:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:07,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:07,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069807230] [2020-12-21 22:12:07,950 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 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 22:12:08,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:08,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:08,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:08,051 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:08,071 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:12:08,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:08,075 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,077 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-21 22:12:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 22:12:08,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42674197] [2020-12-21 22:12:08,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:08,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069807230] [2020-12-21 22:12:08,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:08,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:12:08,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475662636] [2020-12-21 22:12:08,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:12:08,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:12:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:08,116 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2020-12-21 22:12:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:08,169 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-21 22:12:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:12:08,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-21 22:12:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:08,171 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:12:08,171 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:12:08,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:12:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-21 22:12:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:12:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-21 22:12:08,182 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2020-12-21 22:12:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-21 22:12:08,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:12:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-21 22:12:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:08,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:08,185 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:08,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:08,401 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2020-12-21 22:12:08,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:08,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416284881] [2020-12-21 22:12:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:08,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:08,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219392957] [2020-12-21 22:12:08,412 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 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 22:12:08,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-21 22:12:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:08,478 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:08,479 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:08,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-21 22:12:08,584 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:08,585 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2020-12-21 22:12:08,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,616 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2020-12-21 22:12:08,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:12:08,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2020-12-21 22:12:08,676 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:08,676 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2020-12-21 22:12:08,679 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,722 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2020-12-21 22:12:08,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:08,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2020-12-21 22:12:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:12:08,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416284881] [2020-12-21 22:12:08,760 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219392957] [2020-12-21 22:12:08,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:08,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:12:08,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785131963] [2020-12-21 22:12:08,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:08,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:08,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:08,763 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-12-21 22:12:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:08,920 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-12-21 22:12:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:08,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:12:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:08,922 INFO L225 Difference]: With dead ends: 140 [2020-12-21 22:12:08,923 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:12:08,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:12:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-21 22:12:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:12:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-12-21 22:12:08,932 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2020-12-21 22:12:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:08,933 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-12-21 22:12:08,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-12-21 22:12:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:08,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:08,934 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:09,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:12:09,150 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2020-12-21 22:12:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:09,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281489302] [2020-12-21 22:12:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:09,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:09,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059268919] [2020-12-21 22:12:09,161 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 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 22:12:09,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:12:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:12:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 22:12:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281489302] [2020-12-21 22:12:09,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059268919] [2020-12-21 22:12:09,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:09,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:12:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218987448] [2020-12-21 22:12:09,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:12:09,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:12:09,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:09,550 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-12-21 22:12:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:09,815 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-21 22:12:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:12:09,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-21 22:12:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:09,818 INFO L225 Difference]: With dead ends: 103 [2020-12-21 22:12:09,818 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 22:12:09,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:12:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 22:12:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-12-21 22:12:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:12:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-21 22:12:09,828 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2020-12-21 22:12:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:09,828 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-21 22:12:09,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:12:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-21 22:12:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:12:09,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:09,830 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:10,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:12:10,045 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:10,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2020-12-21 22:12:10,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:10,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932412833] [2020-12-21 22:12:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:10,055 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:10,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572536057] [2020-12-21 22:12:10,056 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 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 22:12:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:12:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:12:10,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932412833] [2020-12-21 22:12:10,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:10,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572536057] [2020-12-21 22:12:10,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:10,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:12:10,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943366415] [2020-12-21 22:12:10,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:12:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:12:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:10,297 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2020-12-21 22:12:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:10,480 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-21 22:12:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:12:10,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-21 22:12:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:10,483 INFO L225 Difference]: With dead ends: 336 [2020-12-21 22:12:10,483 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 22:12:10,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 22:12:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2020-12-21 22:12:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:12:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-12-21 22:12:10,494 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2020-12-21 22:12:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:10,495 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-12-21 22:12:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:12:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-12-21 22:12:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:12:10,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:10,496 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:10,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:12:10,711 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2020-12-21 22:12:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:10,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330410073] [2020-12-21 22:12:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:10,720 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:10,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991403368] [2020-12-21 22:12:10,721 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 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 22:12:10,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:10,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:12:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:12:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330410073] [2020-12-21 22:12:11,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991403368] [2020-12-21 22:12:11,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:11,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:12:11,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349236386] [2020-12-21 22:12:11,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:12:11,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:12:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:12:11,068 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2020-12-21 22:12:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:11,274 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2020-12-21 22:12:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:12:11,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-21 22:12:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:11,277 INFO L225 Difference]: With dead ends: 373 [2020-12-21 22:12:11,277 INFO L226 Difference]: Without dead ends: 328 [2020-12-21 22:12:11,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:12:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-21 22:12:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2020-12-21 22:12:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:12:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-12-21 22:12:11,289 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2020-12-21 22:12:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:11,289 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-12-21 22:12:11,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:12:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-12-21 22:12:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:12:11,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:11,291 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:11,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:12:11,506 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2020-12-21 22:12:11,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:11,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868907961] [2020-12-21 22:12:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:11,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:11,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761754769] [2020-12-21 22:12:11,515 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 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 22:12:11,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:12:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:12:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-21 22:12:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868907961] [2020-12-21 22:12:11,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761754769] [2020-12-21 22:12:11,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:11,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:12:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011252285] [2020-12-21 22:12:11,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:12:11,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:12:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:11,976 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 10 states. [2020-12-21 22:12:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:12,265 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-12-21 22:12:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:12:12,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-12-21 22:12:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:12,267 INFO L225 Difference]: With dead ends: 128 [2020-12-21 22:12:12,267 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:12:12,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:12:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:12:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-21 22:12:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 22:12:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-21 22:12:12,280 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2020-12-21 22:12:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:12,281 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-21 22:12:12,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:12:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-21 22:12:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:12:12,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:12,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:12,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:12,491 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2020-12-21 22:12:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:12,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258686762] [2020-12-21 22:12:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:12,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:12,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918692753] [2020-12-21 22:12:12,499 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 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 22:12:12,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:12,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:12,609 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:12,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:12,618 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:12,619 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:12,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:12,641 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:12:12,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:12,647 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:12,648 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:12,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:12:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:12:12,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258686762] [2020-12-21 22:12:12,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918692753] [2020-12-21 22:12:12,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:12,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:12,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752547038] [2020-12-21 22:12:12,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:12,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:12,692 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2020-12-21 22:12:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:12,787 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-12-21 22:12:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:12:12,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-21 22:12:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:12,791 INFO L225 Difference]: With dead ends: 176 [2020-12-21 22:12:12,791 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:12:12,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:12:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-12-21 22:12:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 22:12:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-12-21 22:12:12,798 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2020-12-21 22:12:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:12,798 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-12-21 22:12:12,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-12-21 22:12:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:12:12,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:12,799 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:13,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:13,014 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2020-12-21 22:12:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:13,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084441654] [2020-12-21 22:12:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:13,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:13,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486282253] [2020-12-21 22:12:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:12:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:12:13,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084441654] [2020-12-21 22:12:13,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:13,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486282253] [2020-12-21 22:12:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:12:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370988958] [2020-12-21 22:12:13,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:12:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:12:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:12:13,348 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2020-12-21 22:12:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:13,569 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2020-12-21 22:12:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:12:13,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:12:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:13,572 INFO L225 Difference]: With dead ends: 386 [2020-12-21 22:12:13,572 INFO L226 Difference]: Without dead ends: 346 [2020-12-21 22:12:13,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:12:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-21 22:12:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2020-12-21 22:12:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:12:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-21 22:12:13,582 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2020-12-21 22:12:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:13,582 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-21 22:12:13,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:12:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-21 22:12:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:12:13,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:13,583 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:13,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:12:13,797 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2020-12-21 22:12:13,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:13,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456542187] [2020-12-21 22:12:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:13,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:13,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66195681] [2020-12-21 22:12:13,807 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 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 22:12:13,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:12:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:12:14,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456542187] [2020-12-21 22:12:14,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:14,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66195681] [2020-12-21 22:12:14,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:14,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:12:14,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418005454] [2020-12-21 22:12:14,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:12:14,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:14,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:12:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:12:14,182 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2020-12-21 22:12:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:14,432 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-12-21 22:12:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:12:14,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-21 22:12:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:14,437 INFO L225 Difference]: With dead ends: 423 [2020-12-21 22:12:14,437 INFO L226 Difference]: Without dead ends: 383 [2020-12-21 22:12:14,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 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 22:12:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-21 22:12:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2020-12-21 22:12:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:12:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-12-21 22:12:14,447 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2020-12-21 22:12:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:14,447 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-12-21 22:12:14,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:12:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-12-21 22:12:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:12:14,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:14,448 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:14,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:14,661 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2020-12-21 22:12:14,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:14,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560352127] [2020-12-21 22:12:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:14,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:14,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652402120] [2020-12-21 22:12:14,670 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 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 22:12:14,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:12:14,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:14,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:12:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:29,057 WARN L197 SmtUtils]: Spent 14.24 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-21 22:12:31,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:12:31,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:12:31,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:12:31,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:12:33,542 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2020-12-21 22:12:35,644 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-12-21 22:12:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-21 22:12:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560352127] [2020-12-21 22:12:35,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:35,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652402120] [2020-12-21 22:12:35,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:35,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:12:35,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539344866] [2020-12-21 22:12:35,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:35,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2020-12-21 22:12:35,755 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2020-12-21 22:12:48,117 WARN L197 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-21 22:12:58,435 WARN L197 SmtUtils]: Spent 10.28 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-21 22:13:03,289 WARN L197 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-21 22:13:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:07,826 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2020-12-21 22:13:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:13:07,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-21 22:13:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:07,833 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:13:07,833 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 22:13:07,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=37, Invalid=52, Unknown=1, NotChecked=0, Total=90 [2020-12-21 22:13:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 22:13:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2020-12-21 22:13:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 22:13:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-12-21 22:13:07,848 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2020-12-21 22:13:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:07,849 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-12-21 22:13:07,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-12-21 22:13:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:13:07,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:07,850 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:08,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:13:08,051 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2020-12-21 22:13:08,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:08,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765321731] [2020-12-21 22:13:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:08,066 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:08,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43516301] [2020-12-21 22:13:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order 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 22:13:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:13:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:08,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765321731] [2020-12-21 22:13:08,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:08,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43516301] [2020-12-21 22:13:08,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:08,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:13:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391357404] [2020-12-21 22:13:08,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:13:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:13:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:13:08,645 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2020-12-21 22:13:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:09,127 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2020-12-21 22:13:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:13:09,128 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-21 22:13:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:09,131 INFO L225 Difference]: With dead ends: 515 [2020-12-21 22:13:09,131 INFO L226 Difference]: Without dead ends: 466 [2020-12-21 22:13:09,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:13:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-21 22:13:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2020-12-21 22:13:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:13:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-21 22:13:09,148 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2020-12-21 22:13:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:09,148 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-21 22:13:09,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:13:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-21 22:13:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:13:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:09,150 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:09,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:09,365 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2020-12-21 22:13:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:09,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686020266] [2020-12-21 22:13:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:09,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:09,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734949191] [2020-12-21 22:13:09,375 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 22:13:09,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:09,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:13:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686020266] [2020-12-21 22:13:10,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734949191] [2020-12-21 22:13:10,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:10,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:13:10,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989941153] [2020-12-21 22:13:10,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:13:10,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:13:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:13:10,181 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2020-12-21 22:13:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:10,735 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2020-12-21 22:13:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:13:10,737 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-21 22:13:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:10,740 INFO L225 Difference]: With dead ends: 589 [2020-12-21 22:13:10,740 INFO L226 Difference]: Without dead ends: 540 [2020-12-21 22:13:10,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:13:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-12-21 22:13:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2020-12-21 22:13:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:13:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-12-21 22:13:10,757 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2020-12-21 22:13:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:10,757 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-12-21 22:13:10,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:13:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-12-21 22:13:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:13:10,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:10,759 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:10,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:13:10,963 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2020-12-21 22:13:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:10,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684895518] [2020-12-21 22:13:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:10,971 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:10,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885328875] [2020-12-21 22:13:10,972 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 22:13:11,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:13:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:13:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:11,378 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:13:11,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:11,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:11,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:11,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-21 22:13:11,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:13:11,431 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:11,445 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:11,446 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:11,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-12-21 22:13:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2020-12-21 22:13:11,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684895518] [2020-12-21 22:13:11,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:11,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885328875] [2020-12-21 22:13:11,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:11,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:13:11,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924529269] [2020-12-21 22:13:11,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:13:11,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:11,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:13:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:13:11,599 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2020-12-21 22:13:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:11,968 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2020-12-21 22:13:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:13:11,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-12-21 22:13:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:11,970 INFO L225 Difference]: With dead ends: 171 [2020-12-21 22:13:11,970 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 22:13:11,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:13:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 22:13:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2020-12-21 22:13:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 22:13:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2020-12-21 22:13:11,984 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 111 [2020-12-21 22:13:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:11,985 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2020-12-21 22:13:11,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:13:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2020-12-21 22:13:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:13:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:11,986 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:12,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:13:12,191 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:12,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2020-12-21 22:13:12,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:12,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684748884] [2020-12-21 22:13:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:12,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:12,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834676515] [2020-12-21 22:13:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:13:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:13:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:13,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684748884] [2020-12-21 22:13:13,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:13,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834676515] [2020-12-21 22:13:13,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:13,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:13:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708831238] [2020-12-21 22:13:13,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:13:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:13:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:13:13,007 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand 20 states. [2020-12-21 22:13:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:13,697 INFO L93 Difference]: Finished difference Result 667 states and 780 transitions. [2020-12-21 22:13:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:13:13,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-12-21 22:13:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:13,702 INFO L225 Difference]: With dead ends: 667 [2020-12-21 22:13:13,702 INFO L226 Difference]: Without dead ends: 616 [2020-12-21 22:13:13,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:13:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-12-21 22:13:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 137. [2020-12-21 22:13:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:13:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2020-12-21 22:13:13,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 111 [2020-12-21 22:13:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:13,724 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2020-12-21 22:13:13,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:13:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2020-12-21 22:13:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 22:13:13,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:13,726 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:13:13,941 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2020-12-21 22:13:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:13,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090542226] [2020-12-21 22:13:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:13,951 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:13,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621342509] [2020-12-21 22:13:13,951 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 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 [2020-12-21 22:13:14,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:13:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090542226] [2020-12-21 22:13:14,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621342509] [2020-12-21 22:13:14,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:14,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-21 22:13:14,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36618356] [2020-12-21 22:13:14,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:13:14,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:13:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:13:14,981 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 22 states. [2020-12-21 22:13:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:15,702 INFO L93 Difference]: Finished difference Result 741 states and 866 transitions. [2020-12-21 22:13:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:13:15,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-21 22:13:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:15,708 INFO L225 Difference]: With dead ends: 741 [2020-12-21 22:13:15,708 INFO L226 Difference]: Without dead ends: 690 [2020-12-21 22:13:15,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:13:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-12-21 22:13:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 147. [2020-12-21 22:13:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 22:13:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2020-12-21 22:13:15,740 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 121 [2020-12-21 22:13:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:15,740 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2020-12-21 22:13:15,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:13:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2020-12-21 22:13:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:13:15,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:15,742 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:15,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:13:15,957 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2020-12-21 22:13:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:15,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283132536] [2020-12-21 22:13:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:15,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:15,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356402376] [2020-12-21 22:13:15,976 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:16,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:13:16,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:13:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:16,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-12-21 22:13:16,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283132536] [2020-12-21 22:13:16,368 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:16,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356402376] [2020-12-21 22:13:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026071144] [2020-12-21 22:13:16,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:16,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:16,370 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand 7 states. [2020-12-21 22:13:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:16,662 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2020-12-21 22:13:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:13:16,663 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-12-21 22:13:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:16,665 INFO L225 Difference]: With dead ends: 231 [2020-12-21 22:13:16,665 INFO L226 Difference]: Without dead ends: 198 [2020-12-21 22:13:16,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-21 22:13:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 157. [2020-12-21 22:13:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 22:13:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-12-21 22:13:16,681 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 131 [2020-12-21 22:13:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:16,681 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-12-21 22:13:16,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-12-21 22:13:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 22:13:16,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:16,683 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:16,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:13:16,897 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash -775227217, now seen corresponding path program 4 times [2020-12-21 22:13:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:16,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234579518] [2020-12-21 22:13:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:16,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:16,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089009314] [2020-12-21 22:13:16,905 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:17,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:17,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:13:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:18,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234579518] [2020-12-21 22:13:18,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:18,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089009314] [2020-12-21 22:13:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-21 22:13:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475586759] [2020-12-21 22:13:18,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:13:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:13:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:13:18,312 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 25 states. [2020-12-21 22:13:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:19,161 INFO L93 Difference]: Finished difference Result 872 states and 1026 transitions. [2020-12-21 22:13:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:13:19,163 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2020-12-21 22:13:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:19,168 INFO L225 Difference]: With dead ends: 872 [2020-12-21 22:13:19,168 INFO L226 Difference]: Without dead ends: 811 [2020-12-21 22:13:19,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:13:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-21 22:13:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 172. [2020-12-21 22:13:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 22:13:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2020-12-21 22:13:19,190 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 136 [2020-12-21 22:13:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:19,190 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2020-12-21 22:13:19,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:13:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2020-12-21 22:13:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 22:13:19,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:19,192 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:19,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:19,406 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:19,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1212167450, now seen corresponding path program 5 times [2020-12-21 22:13:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:19,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67280372] [2020-12-21 22:13:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:19,415 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:19,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239255973] [2020-12-21 22:13:19,416 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:21,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-21 22:13:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:13:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:22,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67280372] [2020-12-21 22:13:22,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:22,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239255973] [2020-12-21 22:13:22,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:22,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:13:22,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113057201] [2020-12-21 22:13:22,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:13:22,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:13:22,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:13:22,776 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand 28 states. [2020-12-21 22:13:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:23,692 INFO L93 Difference]: Finished difference Result 983 states and 1155 transitions. [2020-12-21 22:13:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:13:23,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-12-21 22:13:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:23,698 INFO L225 Difference]: With dead ends: 983 [2020-12-21 22:13:23,699 INFO L226 Difference]: Without dead ends: 922 [2020-12-21 22:13:23,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:13:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2020-12-21 22:13:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 187. [2020-12-21 22:13:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-21 22:13:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2020-12-21 22:13:23,722 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 151 [2020-12-21 22:13:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:23,723 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2020-12-21 22:13:23,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:13:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2020-12-21 22:13:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 22:13:23,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:23,724 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:23,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:23,935 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:23,936 INFO L82 PathProgramCache]: Analyzing trace with hash -249350833, now seen corresponding path program 6 times [2020-12-21 22:13:23,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:23,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623831325] [2020-12-21 22:13:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:23,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:23,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121976460] [2020-12-21 22:13:23,946 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:24,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:13:24,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:13:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:24,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 341 proven. 13 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2020-12-21 22:13:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623831325] [2020-12-21 22:13:24,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121976460] [2020-12-21 22:13:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:24,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:13:24,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823061898] [2020-12-21 22:13:24,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:13:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:24,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:13:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:13:24,603 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 8 states. [2020-12-21 22:13:24,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:24,979 INFO L93 Difference]: Finished difference Result 299 states and 341 transitions. [2020-12-21 22:13:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:13:24,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-21 22:13:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:24,983 INFO L225 Difference]: With dead ends: 299 [2020-12-21 22:13:24,983 INFO L226 Difference]: Without dead ends: 266 [2020-12-21 22:13:24,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:13:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-21 22:13:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2020-12-21 22:13:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:13:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2020-12-21 22:13:25,004 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 166 [2020-12-21 22:13:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:25,004 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2020-12-21 22:13:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:13:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2020-12-21 22:13:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 22:13:25,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:25,006 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 25, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:25,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:13:25,213 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 985604822, now seen corresponding path program 7 times [2020-12-21 22:13:25,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:25,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379485363] [2020-12-21 22:13:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:25,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:25,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905953202] [2020-12-21 22:13:25,222 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:13:25,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379485363] [2020-12-21 22:13:26,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905953202] [2020-12-21 22:13:26,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:26,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:13:26,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580494729] [2020-12-21 22:13:26,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:13:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:13:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:13:26,976 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand 32 states. [2020-12-21 22:13:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:28,202 INFO L93 Difference]: Finished difference Result 1159 states and 1364 transitions. [2020-12-21 22:13:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:13:28,204 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-12-21 22:13:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:28,209 INFO L225 Difference]: With dead ends: 1159 [2020-12-21 22:13:28,210 INFO L226 Difference]: Without dead ends: 1084 [2020-12-21 22:13:28,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:13:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2020-12-21 22:13:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 221. [2020-12-21 22:13:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-21 22:13:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2020-12-21 22:13:28,244 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 171 [2020-12-21 22:13:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:28,245 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2020-12-21 22:13:28,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:13:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2020-12-21 22:13:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:13:28,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:28,246 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 30, 29, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:28,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:28,462 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1949349142, now seen corresponding path program 8 times [2020-12-21 22:13:28,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:28,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11835232] [2020-12-21 22:13:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:28,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:28,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325886359] [2020-12-21 22:13:28,472 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:28,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:28,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:13:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:30,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11835232] [2020-12-21 22:13:30,693 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:30,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325886359] [2020-12-21 22:13:30,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:30,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-21 22:13:30,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984475585] [2020-12-21 22:13:30,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:13:30,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:13:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:13:30,706 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand 36 states. [2020-12-21 22:13:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:32,277 INFO L93 Difference]: Finished difference Result 1307 states and 1536 transitions. [2020-12-21 22:13:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:13:32,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2020-12-21 22:13:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:32,283 INFO L225 Difference]: With dead ends: 1307 [2020-12-21 22:13:32,283 INFO L226 Difference]: Without dead ends: 1232 [2020-12-21 22:13:32,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:13:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-12-21 22:13:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 241. [2020-12-21 22:13:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-21 22:13:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2020-12-21 22:13:32,315 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 191 [2020-12-21 22:13:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:32,315 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2020-12-21 22:13:32,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:13:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2020-12-21 22:13:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-21 22:13:32,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:32,317 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 34, 33, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:32,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:13:32,533 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash -312301738, now seen corresponding path program 9 times [2020-12-21 22:13:32,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:32,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283922166] [2020-12-21 22:13:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:32,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:32,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933990579] [2020-12-21 22:13:32,544 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:13:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 22:13:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:32,912 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:13:32,913 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:32,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:32,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:32,935 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-21 22:13:32,975 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:13:32,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:32,990 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:32,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:32,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2020-12-21 22:13:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-12-21 22:13:33,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283922166] [2020-12-21 22:13:33,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:33,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933990579] [2020-12-21 22:13:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:13:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145731514] [2020-12-21 22:13:33,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:13:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:13:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:13:33,583 INFO L87 Difference]: Start difference. First operand 241 states and 262 transitions. Second operand 13 states. [2020-12-21 22:13:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:34,456 INFO L93 Difference]: Finished difference Result 255 states and 278 transitions. [2020-12-21 22:13:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:13:34,457 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 211 [2020-12-21 22:13:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:34,458 INFO L225 Difference]: With dead ends: 255 [2020-12-21 22:13:34,459 INFO L226 Difference]: Without dead ends: 253 [2020-12-21 22:13:34,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:13:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-21 22:13:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2020-12-21 22:13:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-21 22:13:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 268 transitions. [2020-12-21 22:13:34,484 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 268 transitions. Word has length 211 [2020-12-21 22:13:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:34,485 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 268 transitions. [2020-12-21 22:13:34,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:13:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 268 transitions. [2020-12-21 22:13:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 22:13:34,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:34,487 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 34, 33, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:34,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:34,692 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1054975878, now seen corresponding path program 10 times [2020-12-21 22:13:34,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:34,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242511042] [2020-12-21 22:13:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:34,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:34,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827651852] [2020-12-21 22:13:34,702 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:35,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:35,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:13:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:13:38,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242511042] [2020-12-21 22:13:38,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:38,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827651852] [2020-12-21 22:13:38,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:38,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-21 22:13:38,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190099670] [2020-12-21 22:13:38,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:13:38,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:13:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:13:38,642 INFO L87 Difference]: Start difference. First operand 246 states and 268 transitions. Second operand 40 states. [2020-12-21 22:13:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:40,394 INFO L93 Difference]: Finished difference Result 1621 states and 1907 transitions. [2020-12-21 22:13:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:13:40,396 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2020-12-21 22:13:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:40,401 INFO L225 Difference]: With dead ends: 1621 [2020-12-21 22:13:40,401 INFO L226 Difference]: Without dead ends: 1541 [2020-12-21 22:13:40,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:13:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2020-12-21 22:13:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 266. [2020-12-21 22:13:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-21 22:13:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 288 transitions. [2020-12-21 22:13:40,449 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 288 transitions. Word has length 216 [2020-12-21 22:13:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:40,449 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 288 transitions. [2020-12-21 22:13:40,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:13:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 288 transitions. [2020-12-21 22:13:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-21 22:13:40,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:40,451 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 38, 37, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:40,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:13:40,667 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash 938831418, now seen corresponding path program 11 times [2020-12-21 22:13:40,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:40,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685918260] [2020-12-21 22:13:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:40,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:40,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181306577] [2020-12-21 22:13:40,678 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:44,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-21 22:13:44,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 22:13:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4010 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:13:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685918260] [2020-12-21 22:13:47,612 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181306577] [2020-12-21 22:13:47,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:47,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-21 22:13:47,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128825118] [2020-12-21 22:13:47,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:13:47,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:47,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:13:47,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:13:47,615 INFO L87 Difference]: Start difference. First operand 266 states and 288 transitions. Second operand 44 states. [2020-12-21 22:13:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:49,592 INFO L93 Difference]: Finished difference Result 1789 states and 2103 transitions. [2020-12-21 22:13:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 22:13:49,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2020-12-21 22:13:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:49,603 INFO L225 Difference]: With dead ends: 1789 [2020-12-21 22:13:49,604 INFO L226 Difference]: Without dead ends: 1709 [2020-12-21 22:13:49,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:13:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2020-12-21 22:13:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 286. [2020-12-21 22:13:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-21 22:13:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 308 transitions. [2020-12-21 22:13:49,653 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 308 transitions. Word has length 236 [2020-12-21 22:13:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:49,654 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 308 transitions. [2020-12-21 22:13:49,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:13:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 308 transitions. [2020-12-21 22:13:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:13:49,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:49,656 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 42, 41, 6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:49,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:13:49,870 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash -601349126, now seen corresponding path program 12 times [2020-12-21 22:13:49,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:49,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995548796] [2020-12-21 22:13:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:49,886 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380740903] [2020-12-21 22:13:49,886 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:50,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:13:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:50,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:13:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:50,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:13:50,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:50,946 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:50,947 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:50,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:13:50,980 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:13:50,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:50,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:50,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:50,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:13:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 1 proven. 591 refuted. 0 times theorem prover too weak. 4252 trivial. 0 not checked. [2020-12-21 22:13:51,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995548796] [2020-12-21 22:13:51,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:51,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380740903] [2020-12-21 22:13:51,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:51,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:13:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437275780] [2020-12-21 22:13:51,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:13:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:13:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:51,438 INFO L87 Difference]: Start difference. First operand 286 states and 308 transitions. Second operand 10 states. [2020-12-21 22:13:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:52,063 INFO L93 Difference]: Finished difference Result 425 states and 482 transitions. [2020-12-21 22:13:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:13:52,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 256 [2020-12-21 22:13:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:52,067 INFO L225 Difference]: With dead ends: 425 [2020-12-21 22:13:52,067 INFO L226 Difference]: Without dead ends: 345 [2020-12-21 22:13:52,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:13:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-21 22:13:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 292. [2020-12-21 22:13:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-21 22:13:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 309 transitions. [2020-12-21 22:13:52,104 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 309 transitions. Word has length 256 [2020-12-21 22:13:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:52,105 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 309 transitions. [2020-12-21 22:13:52,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:13:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 309 transitions. [2020-12-21 22:13:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:13:52,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:52,111 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:52,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:13:52,319 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1644230328, now seen corresponding path program 13 times [2020-12-21 22:13:52,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:52,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905476636] [2020-12-21 22:13:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:52,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:52,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316734077] [2020-12-21 22:13:52,338 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 22:13:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:13:56,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905476636] [2020-12-21 22:13:56,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:56,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316734077] [2020-12-21 22:13:56,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:56,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-21 22:13:56,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494643279] [2020-12-21 22:13:56,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 22:13:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 22:13:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:13:56,170 INFO L87 Difference]: Start difference. First operand 292 states and 309 transitions. Second operand 48 states. [2020-12-21 22:13:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:58,579 INFO L93 Difference]: Finished difference Result 1969 states and 2301 transitions. [2020-12-21 22:13:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 22:13:58,581 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 256 [2020-12-21 22:13:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:58,590 INFO L225 Difference]: With dead ends: 1969 [2020-12-21 22:13:58,591 INFO L226 Difference]: Without dead ends: 1883 [2020-12-21 22:13:58,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:13:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2020-12-21 22:13:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 312. [2020-12-21 22:13:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-21 22:13:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 329 transitions. [2020-12-21 22:13:58,637 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 329 transitions. Word has length 256 [2020-12-21 22:13:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:58,638 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 329 transitions. [2020-12-21 22:13:58,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 22:13:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 329 transitions. [2020-12-21 22:13:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-21 22:13:58,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:58,640 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 45, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:58,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:13:58,855 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1853928328, now seen corresponding path program 14 times [2020-12-21 22:13:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:58,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243306675] [2020-12-21 22:13:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:58,867 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:58,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199001954] [2020-12-21 22:13:58,868 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:59,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:59,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 22:13:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5758 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:14:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243306675] [2020-12-21 22:14:03,160 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:03,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199001954] [2020-12-21 22:14:03,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:03,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-21 22:14:03,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719649002] [2020-12-21 22:14:03,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 22:14:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:03,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 22:14:03,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:14:03,164 INFO L87 Difference]: Start difference. First operand 312 states and 329 transitions. Second operand 52 states. [2020-12-21 22:14:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:06,336 INFO L93 Difference]: Finished difference Result 2137 states and 2497 transitions. [2020-12-21 22:14:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 22:14:06,339 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 276 [2020-12-21 22:14:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:06,348 INFO L225 Difference]: With dead ends: 2137 [2020-12-21 22:14:06,349 INFO L226 Difference]: Without dead ends: 2051 [2020-12-21 22:14:06,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:14:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2020-12-21 22:14:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 332. [2020-12-21 22:14:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-21 22:14:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 349 transitions. [2020-12-21 22:14:06,405 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 349 transitions. Word has length 276 [2020-12-21 22:14:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:06,406 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 349 transitions. [2020-12-21 22:14:06,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 22:14:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 349 transitions. [2020-12-21 22:14:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-21 22:14:06,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:06,408 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 49, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:06,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:14:06,622 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1379484216, now seen corresponding path program 15 times [2020-12-21 22:14:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:06,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105570174] [2020-12-21 22:14:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:06,635 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:06,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862422656] [2020-12-21 22:14:06,636 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:14:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:14:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:07,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:07,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6752 backedges. 919 proven. 27 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2020-12-21 22:14:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105570174] [2020-12-21 22:14:07,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:07,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862422656] [2020-12-21 22:14:07,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:07,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:14:07,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581831456] [2020-12-21 22:14:07,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:14:07,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:14:07,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:07,664 INFO L87 Difference]: Start difference. First operand 332 states and 349 transitions. Second operand 9 states. [2020-12-21 22:14:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:08,396 INFO L93 Difference]: Finished difference Result 461 states and 501 transitions. [2020-12-21 22:14:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:14:08,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2020-12-21 22:14:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:08,402 INFO L225 Difference]: With dead ends: 461 [2020-12-21 22:14:08,402 INFO L226 Difference]: Without dead ends: 423 [2020-12-21 22:14:08,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:14:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-12-21 22:14:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 327. [2020-12-21 22:14:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-21 22:14:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 343 transitions. [2020-12-21 22:14:08,441 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 343 transitions. Word has length 296 [2020-12-21 22:14:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:08,441 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 343 transitions. [2020-12-21 22:14:08,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:14:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 343 transitions. [2020-12-21 22:14:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-21 22:14:08,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:08,444 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 52, 49, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:08,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:08,650 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:08,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1841200170, now seen corresponding path program 16 times [2020-12-21 22:14:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:08,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961181235] [2020-12-21 22:14:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:08,660 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:08,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525935198] [2020-12-21 22:14:08,661 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:14,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:14,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-21 22:14:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7279 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:14:19,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961181235] [2020-12-21 22:14:19,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525935198] [2020-12-21 22:14:19,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:19,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-21 22:14:19,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702903425] [2020-12-21 22:14:19,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 22:14:19,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 22:14:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:14:19,583 INFO L87 Difference]: Start difference. First operand 327 states and 343 transitions. Second operand 58 states. [2020-12-21 22:14:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:23,115 INFO L93 Difference]: Finished difference Result 2379 states and 2781 transitions. [2020-12-21 22:14:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 22:14:23,118 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 306 [2020-12-21 22:14:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:23,125 INFO L225 Difference]: With dead ends: 2379 [2020-12-21 22:14:23,125 INFO L226 Difference]: Without dead ends: 2298 [2020-12-21 22:14:23,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:14:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2020-12-21 22:14:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 357. [2020-12-21 22:14:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-21 22:14:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 373 transitions. [2020-12-21 22:14:23,186 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 373 transitions. Word has length 306 [2020-12-21 22:14:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:23,186 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 373 transitions. [2020-12-21 22:14:23,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 22:14:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 373 transitions. [2020-12-21 22:14:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-21 22:14:23,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:23,189 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 58, 55, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:23,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:23,404 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1586100342, now seen corresponding path program 17 times [2020-12-21 22:14:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:23,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45634130] [2020-12-21 22:14:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:23,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117433091] [2020-12-21 22:14:23,419 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true