/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_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:13:38,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:13:38,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:13:38,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:13:38,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:13:38,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:13:38,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:13:38,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:13:38,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:13:38,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:13:38,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:13:38,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:13:38,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:13:38,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:13:38,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:13:38,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:13:38,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:13:38,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:13:38,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:13:38,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:13:38,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:13:38,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:13:38,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:13:38,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:13:38,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:13:38,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:13:38,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:13:38,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:13:38,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:13:38,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:13:38,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:13:38,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:13:38,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:13:38,686 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:13:38,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:13:38,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:13:38,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:13:38,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:13:38,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:13:38,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:13:38,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:13:38,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:13:38,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:13:38,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:13:38,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:13:38,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:13:38,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:13:38,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:13:38,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:13:38,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:13:38,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:13:38,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:13:38,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:13:38,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:13:38,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:13:39,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:13:39,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:13:39,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:13:39,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:13:39,076 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:13:39,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2020-12-21 22:13:39,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75a33d9f/9165f640808547889887f83d5ae436f0/FLAGbd26f71cd [2020-12-21 22:13:39,760 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:13:39,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2020-12-21 22:13:39,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75a33d9f/9165f640808547889887f83d5ae436f0/FLAGbd26f71cd [2020-12-21 22:13:40,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75a33d9f/9165f640808547889887f83d5ae436f0 [2020-12-21 22:13:40,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:13:40,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:13:40,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:13:40,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:13:40,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:13:40,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d055492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40, skipping insertion in model container [2020-12-21 22:13:40,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:13:40,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:13:40,306 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_4.c[331,344] [2020-12-21 22:13:40,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:13:40,337 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:13:40,358 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_4.c[331,344] [2020-12-21 22:13:40,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:13:40,409 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:13:40,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40 WrapperNode [2020-12-21 22:13:40,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:13:40,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:13:40,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:13:40,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:13:40,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:13:40,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:13:40,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:13:40,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:13:40,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (1/1) ... [2020-12-21 22:13:40,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:13:40,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:13:40,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:13:40,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:13:40,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (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 22:13:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:13:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:13:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:13:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:13:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:13:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:13:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:13:41,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:13:41,145 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:13:41,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:13:41 BoogieIcfgContainer [2020-12-21 22:13:41,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:13:41,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:13:41,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:13:41,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:13:41,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:13:40" (1/3) ... [2020-12-21 22:13:41,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a352c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:13:41, skipping insertion in model container [2020-12-21 22:13:41,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:13:40" (2/3) ... [2020-12-21 22:13:41,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a352c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:13:41, skipping insertion in model container [2020-12-21 22:13:41,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:13:41" (3/3) ... [2020-12-21 22:13:41,157 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.c [2020-12-21 22:13:41,164 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:13:41,170 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:13:41,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:13:41,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:13:41,224 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:13:41,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:13:41,224 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:13:41,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:13:41,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:13:41,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:13:41,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:13:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:13:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:13:41,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:41,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:41,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:13:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:41,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251690312] [2020-12-21 22:13:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:41,472 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:41,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148767678] [2020-12-21 22:13:41,474 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 22:13:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:13:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:41,634 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 22:13:41,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251690312] [2020-12-21 22:13:41,636 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:41,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148767678] [2020-12-21 22:13:41,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:13:41,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092905851] [2020-12-21 22:13:41,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:13:41,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:13:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:13:41,675 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:13:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:41,696 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:13:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:13:41,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:13:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:41,722 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:13:41,723 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:13:41,727 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 22:13:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:13:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:13:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:13:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:13:41,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:13:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:41,770 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:13:41,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:13:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:13:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:13:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:41,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:41,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:13:41,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:13:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813896251] [2020-12-21 22:13:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:42,006 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:42,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468322160] [2020-12-21 22:13:42,007 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 22:13:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:13:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:42,135 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 22:13:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813896251] [2020-12-21 22:13:42,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:42,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468322160] [2020-12-21 22:13:42,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:42,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:13:42,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663292019] [2020-12-21 22:13:42,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:13:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:42,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:13:42,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:13:42,143 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:13:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:42,226 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-21 22:13:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:13:42,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:13:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:42,227 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:13:42,227 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:13:42,229 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 22:13:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:13:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-21 22:13:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:13:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:13:42,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 22:13:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:42,235 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:13:42,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:13:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:13:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:13:42,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:42,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:42,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:42,452 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:42,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-21 22:13:42,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:42,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028563981] [2020-12-21 22:13:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:42,470 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:42,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886752760] [2020-12-21 22:13:42,471 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 22:13:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:13:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:42,578 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 22:13:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028563981] [2020-12-21 22:13:42,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:42,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886752760] [2020-12-21 22:13:42,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:42,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:13:42,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234349000] [2020-12-21 22:13:42,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:13:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:13:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:13:42,582 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 22:13:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:42,677 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-21 22:13:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:13:42,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:13:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:42,682 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:13:42,682 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:13:42,682 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 22:13:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:13:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-12-21 22:13:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:13:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 22:13:42,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-21 22:13:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:42,689 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 22:13:42,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:13:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 22:13:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:13:42,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:42,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:42,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:42,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-12-21 22:13:42,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:42,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282483816] [2020-12-21 22:13:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:42,909 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:42,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727422783] [2020-12-21 22:13:42,911 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 22:13:43,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:13:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:13:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:43,150 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 22:13:43,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282483816] [2020-12-21 22:13:43,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:43,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727422783] [2020-12-21 22:13:43,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:43,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:13:43,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429883423] [2020-12-21 22:13:43,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:13:43,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:13:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:13:43,153 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-12-21 22:13:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:43,254 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:13:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:13:43,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:13:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:43,257 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:13:43,257 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:13:43,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:13:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:13:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-21 22:13:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:13:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 22:13:43,265 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-21 22:13:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:43,265 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 22:13:43,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:13:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 22:13:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:13:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:43,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:43,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:43,480 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-12-21 22:13:43,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:43,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402318700] [2020-12-21 22:13:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:43,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:43,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955791554] [2020-12-21 22:13:43,495 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 22:13:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:43,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:13:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:43,638 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 22:13:43,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402318700] [2020-12-21 22:13:43,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:43,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955791554] [2020-12-21 22:13:43,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:43,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:13:43,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119597192] [2020-12-21 22:13:43,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:13:43,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:13:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:13:43,642 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-21 22:13:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:43,740 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-12-21 22:13:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:13:43,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:13:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:43,742 INFO L225 Difference]: With dead ends: 89 [2020-12-21 22:13:43,743 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:13:43,743 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 22:13:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:13:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-12-21 22:13:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:13:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-21 22:13:43,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-12-21 22:13:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:43,752 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-21 22:13:43,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:13:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-21 22:13:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:13:43,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:43,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:43,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:43,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-12-21 22:13:43,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:43,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474296190] [2020-12-21 22:13:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:43,985 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:43,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640807054] [2020-12-21 22:13:43,985 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 22:13:44,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:13:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:13:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:44,186 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 22:13:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474296190] [2020-12-21 22:13:44,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640807054] [2020-12-21 22:13:44,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:44,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:13:44,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504769947] [2020-12-21 22:13:44,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:13:44,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:44,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:13:44,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:13:44,190 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-12-21 22:13:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:44,346 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-21 22:13:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:13:44,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-21 22:13:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:44,348 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:13:44,348 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:13:44,349 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 22:13:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:13:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-21 22:13:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:13:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-21 22:13:44,356 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-12-21 22:13:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:44,357 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-21 22:13:44,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:13:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-21 22:13:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:13:44,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:44,358 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 22:13:44,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:44,573 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2020-12-21 22:13:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:44,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812591074] [2020-12-21 22:13:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:44,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:44,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388205804] [2020-12-21 22:13:44,587 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 22:13:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:13:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:44,768 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 22:13:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812591074] [2020-12-21 22:13:44,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:44,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388205804] [2020-12-21 22:13:44,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:44,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903251605] [2020-12-21 22:13:44,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:44,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:44,772 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-12-21 22:13:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:44,903 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-12-21 22:13:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:13:44,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 22:13:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:44,910 INFO L225 Difference]: With dead ends: 127 [2020-12-21 22:13:44,911 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:13:44,912 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 22:13:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:13:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-12-21 22:13:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:13:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 22:13:44,934 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-12-21 22:13:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:44,935 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 22:13:44,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 22:13:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:13:44,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:44,939 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 22:13:45,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:45,141 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2020-12-21 22:13:45,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:45,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354730207] [2020-12-21 22:13:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:45,155 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:45,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647593999] [2020-12-21 22:13:45,157 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 22:13:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:13:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:45,399 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 22:13:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354730207] [2020-12-21 22:13:45,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647593999] [2020-12-21 22:13:45,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:45,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:13:45,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842987854] [2020-12-21 22:13:45,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:13:45,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:45,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:13:45,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:13:45,402 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-12-21 22:13:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:45,527 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-12-21 22:13:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:13:45,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 22:13:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:45,529 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:13:45,529 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:13:45,530 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 22:13:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:13:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-12-21 22:13:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:13:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-21 22:13:45,538 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-12-21 22:13:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:45,538 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-21 22:13:45,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:13:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-21 22:13:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:13:45,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:45,540 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 22:13:45,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:13:45,754 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2020-12-21 22:13:45,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:45,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214459888] [2020-12-21 22:13:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:45,765 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:45,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581809007] [2020-12-21 22:13:45,766 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 22:13:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:13:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:13:45,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:46,010 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 22:13:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214459888] [2020-12-21 22:13:46,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581809007] [2020-12-21 22:13:46,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:46,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100617517] [2020-12-21 22:13:46,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:46,013 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2020-12-21 22:13:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:46,174 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-21 22:13:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:13:46,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-21 22:13:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:46,175 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:13:46,175 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:13:46,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:13:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:13:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-21 22:13:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:13:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-21 22:13:46,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-12-21 22:13:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:46,183 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-21 22:13:46,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-21 22:13:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:13:46,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:46,184 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 22:13:46,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:46,389 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2020-12-21 22:13:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:46,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741737982] [2020-12-21 22:13:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:46,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:46,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240683141] [2020-12-21 22:13:46,401 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 22:13:46,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:13:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:46,527 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 22:13:46,528 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:46,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:46,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:46,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:13:46,560 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 22:13:46,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:46,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:46,564 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 22:13:46,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-21 22:13:46,591 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 22:13:46,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741737982] [2020-12-21 22:13:46,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:46,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240683141] [2020-12-21 22:13:46,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:46,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:46,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165492109] [2020-12-21 22:13:46,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:13:46,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:13:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:13:46,594 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2020-12-21 22:13:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:46,661 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-12-21 22:13:46,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:13:46,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 22:13:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:46,662 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:13:46,662 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:13:46,663 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 22:13:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:13:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-12-21 22:13:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:13:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 22:13:46,669 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-21 22:13:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:46,669 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 22:13:46,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:13:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 22:13:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:13:46,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:46,670 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 22:13:46,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:46,886 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2020-12-21 22:13:46,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:46,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990473715] [2020-12-21 22:13:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:46,897 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:46,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883483219] [2020-12-21 22:13:46,897 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 22:13:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:46,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:13:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:47,098 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 22:13:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990473715] [2020-12-21 22:13:47,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883483219] [2020-12-21 22:13:47,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:13:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628386544] [2020-12-21 22:13:47,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:13:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:13:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:13:47,101 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-12-21 22:13:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:47,232 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 22:13:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:13:47,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-21 22:13:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:47,234 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:13:47,234 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:13:47,235 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 22:13:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:13:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2020-12-21 22:13:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:13:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 22:13:47,243 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2020-12-21 22:13:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:47,243 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 22:13:47,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:13:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 22:13:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:13:47,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:47,244 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 22:13:47,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:13:47,458 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2020-12-21 22:13:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:47,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278352932] [2020-12-21 22:13:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:47,467 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:47,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216956313] [2020-12-21 22:13:47,468 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 22:13:47,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:47,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:13:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:47,730 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 22:13:47,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278352932] [2020-12-21 22:13:47,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216956313] [2020-12-21 22:13:47,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:47,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:13:47,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316569705] [2020-12-21 22:13:47,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:13:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:13:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:47,733 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2020-12-21 22:13:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:47,889 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2020-12-21 22:13:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:13:47,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 22:13:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:47,892 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:13:47,892 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 22:13:47,892 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 22:13:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 22:13:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2020-12-21 22:13:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:13:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 22:13:47,902 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2020-12-21 22:13:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:47,902 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 22:13:47,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:13:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 22:13:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:13:47,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:47,903 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 22:13:48,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:48,118 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2020-12-21 22:13:48,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:48,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092950602] [2020-12-21 22:13:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:48,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:48,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23838908] [2020-12-21 22:13:48,137 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 22:13:48,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:13:48,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:13:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:48,322 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 22:13:48,323 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,329 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:48,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,330 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:13:48,350 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 22:13:48,351 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:48,356 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 22:13:48,357 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:13:48,413 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 22:13:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092950602] [2020-12-21 22:13:48,416 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:48,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23838908] [2020-12-21 22:13:48,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:48,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:13:48,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926815808] [2020-12-21 22:13:48,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:48,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:48,418 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2020-12-21 22:13:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:48,540 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-12-21 22:13:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:13:48,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-21 22:13:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:48,542 INFO L225 Difference]: With dead ends: 136 [2020-12-21 22:13:48,543 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:13:48,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:13:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:13:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-12-21 22:13:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:13:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-21 22:13:48,550 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2020-12-21 22:13:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:48,551 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-21 22:13:48,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-21 22:13:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:13:48,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:48,552 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 22:13:48,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:13:48,767 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:48,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2020-12-21 22:13:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:48,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69771913] [2020-12-21 22:13:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:48,777 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:48,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926352711] [2020-12-21 22:13:48,778 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 22:13:48,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:48,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:13:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:48,851 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 22:13:48,852 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:48,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:13:48,875 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 22:13:48,877 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:48,879 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:48,880 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 22:13:48,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-21 22:13:48,912 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 22:13:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69771913] [2020-12-21 22:13:48,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926352711] [2020-12-21 22:13:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:13:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:13:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967885533] [2020-12-21 22:13:48,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:13:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:13:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:13:48,915 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2020-12-21 22:13:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:48,963 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-21 22:13:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:13:48,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-21 22:13:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:48,965 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:13:48,965 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:13:48,966 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 22:13:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:13:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-21 22:13:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:13:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-21 22:13:48,971 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2020-12-21 22:13:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:48,972 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-21 22:13:48,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:13:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-21 22:13:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:13:48,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:48,973 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 22:13:49,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:49,187 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2020-12-21 22:13:49,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:49,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343813436] [2020-12-21 22:13:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:49,196 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:49,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344066432] [2020-12-21 22:13:49,196 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 22:13:49,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-21 22:13:49,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:13:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:49,262 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 22:13:49,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:49,265 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:49,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:49,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-21 22:13:49,365 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:49,365 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 22:13:49,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:49,399 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2020-12-21 22:13:49,403 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 22:13:49,403 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2020-12-21 22:13:49,461 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:49,461 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 22:13:49,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:49,479 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2020-12-21 22:13:49,481 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 22:13:49,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2020-12-21 22:13:49,514 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 22:13:49,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343813436] [2020-12-21 22:13:49,514 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:49,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344066432] [2020-12-21 22:13:49,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:49,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:13:49,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262023667] [2020-12-21 22:13:49,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:13:49,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:13:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:13:49,517 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-12-21 22:13:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:49,661 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-12-21 22:13:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:13:49,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:13:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:49,663 INFO L225 Difference]: With dead ends: 140 [2020-12-21 22:13:49,663 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:13:49,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:13:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:13:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-21 22:13:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:13:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-12-21 22:13:49,687 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2020-12-21 22:13:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:49,688 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-12-21 22:13:49,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:13:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-12-21 22:13:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:13:49,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:49,689 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 22:13:49,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:13:49,905 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2020-12-21 22:13:49,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:49,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536290854] [2020-12-21 22:13:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:49,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:49,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340138573] [2020-12-21 22:13:49,914 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 22:13:50,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:13:50,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:13:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:50,303 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 22:13:50,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536290854] [2020-12-21 22:13:50,308 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:50,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340138573] [2020-12-21 22:13:50,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:50,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:13:50,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483689535] [2020-12-21 22:13:50,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:13:50,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:13:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:50,310 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-12-21 22:13:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:50,534 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-21 22:13:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:13:50,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-21 22:13:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:50,536 INFO L225 Difference]: With dead ends: 103 [2020-12-21 22:13:50,536 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 22:13:50,536 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 22:13:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 22:13:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-12-21 22:13:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:13:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-21 22:13:50,544 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2020-12-21 22:13:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:50,544 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-21 22:13:50,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:13:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-21 22:13:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:13:50,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:50,545 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 22:13:50,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:13:50,755 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2020-12-21 22:13:50,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:50,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586147265] [2020-12-21 22:13:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:50,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:50,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437190171] [2020-12-21 22:13:50,763 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 22:13:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:13:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:50,983 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 22:13:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586147265] [2020-12-21 22:13:50,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437190171] [2020-12-21 22:13:50,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:50,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:13:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340763453] [2020-12-21 22:13:50,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:13:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:13:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:13:50,986 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2020-12-21 22:13:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:51,176 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-21 22:13:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:13:51,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-21 22:13:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:51,179 INFO L225 Difference]: With dead ends: 336 [2020-12-21 22:13:51,179 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 22:13:51,180 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 22:13:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 22:13:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2020-12-21 22:13:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:13:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-12-21 22:13:51,190 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2020-12-21 22:13:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:51,191 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-12-21 22:13:51,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:13:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-12-21 22:13:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:13:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:51,192 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 22:13:51,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:13:51,407 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2020-12-21 22:13:51,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:51,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388403238] [2020-12-21 22:13:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:51,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806592164] [2020-12-21 22:13:51,418 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 22:13:51,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:13:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:51,769 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 22:13:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388403238] [2020-12-21 22:13:51,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806592164] [2020-12-21 22:13:51,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:51,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:13:51,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004566921] [2020-12-21 22:13:51,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:13:51,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:51,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:13:51,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:13:51,772 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2020-12-21 22:13:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:51,955 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2020-12-21 22:13:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:13:51,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-21 22:13:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:51,957 INFO L225 Difference]: With dead ends: 373 [2020-12-21 22:13:51,958 INFO L226 Difference]: Without dead ends: 328 [2020-12-21 22:13:51,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:13:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-21 22:13:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2020-12-21 22:13:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:13:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-12-21 22:13:51,968 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2020-12-21 22:13:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:51,969 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-12-21 22:13:51,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:13:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-12-21 22:13:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:13:51,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:51,970 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 22:13:52,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:13:52,183 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2020-12-21 22:13:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:52,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404954415] [2020-12-21 22:13:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:52,192 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:52,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545598913] [2020-12-21 22:13:52,192 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 22:13:52,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:13:52,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 22:13:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:52,678 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 22:13:52,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404954415] [2020-12-21 22:13:52,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545598913] [2020-12-21 22:13:52,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:52,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:13:52,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113070892] [2020-12-21 22:13:52,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:13:52,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:13:52,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:13:52,682 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 11 states. [2020-12-21 22:13:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:52,913 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-12-21 22:13:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:13:52,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-21 22:13:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:52,915 INFO L225 Difference]: With dead ends: 128 [2020-12-21 22:13:52,915 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:13:52,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:13:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:13:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-21 22:13:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 22:13:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-21 22:13:52,924 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2020-12-21 22:13:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:52,925 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-21 22:13:52,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:13:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-21 22:13:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:13:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:52,926 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 22:13:53,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:53,140 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2020-12-21 22:13:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:53,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483113669] [2020-12-21 22:13:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:53,149 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:53,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882380844] [2020-12-21 22:13:53,149 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 22:13:53,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:53,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:53,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:13:53,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:53,244 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 22:13:53,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:53,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:53,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:53,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:13:53,272 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 22:13:53,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:53,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:53,278 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 22:13:53,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:13:53,325 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 22:13:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483113669] [2020-12-21 22:13:53,326 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:53,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882380844] [2020-12-21 22:13:53,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:53,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:13:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110201848] [2020-12-21 22:13:53,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:53,327 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2020-12-21 22:13:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:53,413 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-12-21 22:13:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:13:53,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-21 22:13:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:53,415 INFO L225 Difference]: With dead ends: 176 [2020-12-21 22:13:53,415 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:13:53,415 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 22:13:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:13:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-12-21 22:13:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 22:13:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-12-21 22:13:53,421 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2020-12-21 22:13:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:53,421 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-12-21 22:13:53,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-12-21 22:13:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:13:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:53,422 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 22:13:53,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:53,636 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2020-12-21 22:13:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:53,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601294803] [2020-12-21 22:13:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:53,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:53,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338597024] [2020-12-21 22:13:53,644 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 22:13:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:13:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:53,937 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 22:13:53,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601294803] [2020-12-21 22:13:53,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:53,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338597024] [2020-12-21 22:13:53,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:53,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:13:53,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749960295] [2020-12-21 22:13:53,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:13:53,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:13:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:13:53,939 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2020-12-21 22:13:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:54,138 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2020-12-21 22:13:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:13:54,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:13:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:54,141 INFO L225 Difference]: With dead ends: 386 [2020-12-21 22:13:54,141 INFO L226 Difference]: Without dead ends: 346 [2020-12-21 22:13:54,142 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 22:13:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-21 22:13:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2020-12-21 22:13:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:13:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-21 22:13:54,150 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2020-12-21 22:13:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:54,150 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-21 22:13:54,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:13:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-21 22:13:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:13:54,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:54,151 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 22:13:54,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:13:54,367 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2020-12-21 22:13:54,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:54,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659311881] [2020-12-21 22:13:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:54,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:54,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409799518] [2020-12-21 22:13:54,375 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 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 22:13:54,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:54,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:54,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:13:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:54,747 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 22:13:54,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659311881] [2020-12-21 22:13:54,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:54,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409799518] [2020-12-21 22:13:54,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:13:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619652764] [2020-12-21 22:13:54,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:13:54,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:13:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:13:54,749 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2020-12-21 22:13:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:54,963 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-12-21 22:13:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:13:54,965 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-21 22:13:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:54,967 INFO L225 Difference]: With dead ends: 423 [2020-12-21 22:13:54,967 INFO L226 Difference]: Without dead ends: 383 [2020-12-21 22:13:54,968 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 22:13:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-21 22:13:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2020-12-21 22:13:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:13:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-12-21 22:13:54,977 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2020-12-21 22:13:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:54,977 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-12-21 22:13:54,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:13:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-12-21 22:13:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:13:54,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:54,978 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 22:13:55,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:55,191 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2020-12-21 22:13:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:55,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309725612] [2020-12-21 22:13:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:55,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:55,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348287686] [2020-12-21 22:13:55,201 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 22:13:55,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:13:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:13:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:09,601 WARN L197 SmtUtils]: Spent 14.28 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-21 22:14:11,662 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-21 22:14:11,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:11,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:11,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:11,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:14:13,982 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2020-12-21 22:14:16,055 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-12-21 22:14:16,134 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 22:14:16,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309725612] [2020-12-21 22:14:16,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:16,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348287686] [2020-12-21 22:14:16,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:16,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:14:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512361324] [2020-12-21 22:14:16,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:16,136 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2020-12-21 22:14:26,420 WARN L197 SmtUtils]: Spent 10.21 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-21 22:14:36,720 WARN L197 SmtUtils]: Spent 10.26 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-21 22:14:43,169 WARN L197 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-21 22:14:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:47,668 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2020-12-21 22:14:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:14:47,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-21 22:14:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:47,676 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:14:47,676 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 22:14:47,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:14:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 22:14:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2020-12-21 22:14:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 22:14:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-12-21 22:14:47,692 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2020-12-21 22:14:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:47,692 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-12-21 22:14:47,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-12-21 22:14:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:14:47,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:47,693 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 22:14:47,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:14:47,895 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2020-12-21 22:14:47,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:47,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790001744] [2020-12-21 22:14:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:47,906 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:47,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131314689] [2020-12-21 22:14:47,906 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 22:14:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:14:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:48,390 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 22:14:48,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790001744] [2020-12-21 22:14:48,390 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:48,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131314689] [2020-12-21 22:14:48,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:48,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:14:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358846624] [2020-12-21 22:14:48,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:14:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:14:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:14:48,392 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2020-12-21 22:14:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:48,791 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2020-12-21 22:14:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:14:48,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-21 22:14:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:48,795 INFO L225 Difference]: With dead ends: 515 [2020-12-21 22:14:48,795 INFO L226 Difference]: Without dead ends: 466 [2020-12-21 22:14:48,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:14:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-21 22:14:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2020-12-21 22:14:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:14:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-21 22:14:48,810 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2020-12-21 22:14:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:48,810 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-21 22:14:48,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:14:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-21 22:14:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:14:48,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:48,812 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 22:14:49,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:49,028 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2020-12-21 22:14:49,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:49,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399216185] [2020-12-21 22:14:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:49,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148219998] [2020-12-21 22:14:49,042 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 22:14:49,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:49,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:14:49,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:49,722 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 22:14:49,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399216185] [2020-12-21 22:14:49,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:49,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148219998] [2020-12-21 22:14:49,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:49,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:14:49,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342709719] [2020-12-21 22:14:49,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:14:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:14:49,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:14:49,724 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2020-12-21 22:14:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:50,235 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2020-12-21 22:14:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:14:50,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-21 22:14:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:50,239 INFO L225 Difference]: With dead ends: 589 [2020-12-21 22:14:50,240 INFO L226 Difference]: Without dead ends: 540 [2020-12-21 22:14:50,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:14:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-12-21 22:14:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2020-12-21 22:14:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:14:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-12-21 22:14:50,257 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2020-12-21 22:14:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:50,257 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-12-21 22:14:50,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:14:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-12-21 22:14:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:14:50,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:50,258 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 22:14:50,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:14:50,462 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:50,463 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2020-12-21 22:14:50,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:50,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185651860] [2020-12-21 22:14:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:50,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:50,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870066986] [2020-12-21 22:14:50,471 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 22:14:50,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:14:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:14:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:50,808 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 22:14:50,809 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:50,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:50,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:50,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-21 22:14:50,856 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 22:14:50,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:50,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:50,869 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 22:14:50,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2020-12-21 22:14:51,018 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 22:14:51,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185651860] [2020-12-21 22:14:51,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:51,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870066986] [2020-12-21 22:14:51,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:51,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:14:51,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800579018] [2020-12-21 22:14:51,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:14:51,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:14:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:51,022 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2020-12-21 22:14:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:51,513 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2020-12-21 22:14:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:14:51,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-12-21 22:14:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:51,515 INFO L225 Difference]: With dead ends: 193 [2020-12-21 22:14:51,515 INFO L226 Difference]: Without dead ends: 160 [2020-12-21 22:14:51,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:14:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-21 22:14:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2020-12-21 22:14:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 22:14:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2020-12-21 22:14:51,528 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 111 [2020-12-21 22:14:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:51,528 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2020-12-21 22:14:51,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:14:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2020-12-21 22:14:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:14:51,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:51,529 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 22:14:51,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:14:51,733 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:51,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2020-12-21 22:14:51,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:51,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851272915] [2020-12-21 22:14:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:51,743 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:51,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723681637] [2020-12-21 22:14:51,743 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 22:14:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:14:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:52,397 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 22:14:52,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851272915] [2020-12-21 22:14:52,397 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:52,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723681637] [2020-12-21 22:14:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:14:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964735998] [2020-12-21 22:14:52,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:14:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:14:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:14:52,399 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 20 states. [2020-12-21 22:14:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:52,918 INFO L93 Difference]: Finished difference Result 681 states and 798 transitions. [2020-12-21 22:14:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:14:52,919 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-12-21 22:14:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:52,922 INFO L225 Difference]: With dead ends: 681 [2020-12-21 22:14:52,922 INFO L226 Difference]: Without dead ends: 623 [2020-12-21 22:14:52,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:14:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-12-21 22:14:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 144. [2020-12-21 22:14:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-21 22:14:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-12-21 22:14:52,941 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 111 [2020-12-21 22:14:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:52,941 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-12-21 22:14:52,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:14:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-12-21 22:14:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 22:14:52,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:52,943 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 22:14:53,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:14:53,157 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2020-12-21 22:14:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640553297] [2020-12-21 22:14:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:53,167 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:53,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932996969] [2020-12-21 22:14:53,167 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 22:14:53,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:14:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:53,969 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 22:14:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640553297] [2020-12-21 22:14:53,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932996969] [2020-12-21 22:14:53,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:53,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-21 22:14:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897360977] [2020-12-21 22:14:53,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:14:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:14:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:14:53,972 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 22 states. [2020-12-21 22:14:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:54,541 INFO L93 Difference]: Finished difference Result 755 states and 884 transitions. [2020-12-21 22:14:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:14:54,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-21 22:14:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:54,545 INFO L225 Difference]: With dead ends: 755 [2020-12-21 22:14:54,546 INFO L226 Difference]: Without dead ends: 697 [2020-12-21 22:14:54,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:14:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-12-21 22:14:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 154. [2020-12-21 22:14:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-21 22:14:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2020-12-21 22:14:54,563 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 121 [2020-12-21 22:14:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:54,564 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2020-12-21 22:14:54,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:14:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2020-12-21 22:14:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:14:54,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:54,565 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 22:14:54,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:14:54,782 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2020-12-21 22:14:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817309667] [2020-12-21 22:14:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:54,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:54,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442811015] [2020-12-21 22:14:54,792 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 22:14:54,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:14:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:14:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:55,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:55,205 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 22:14:55,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817309667] [2020-12-21 22:14:55,206 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:55,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442811015] [2020-12-21 22:14:55,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:55,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:14:55,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979527615] [2020-12-21 22:14:55,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:55,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:55,208 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand 7 states. [2020-12-21 22:14:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:55,445 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-12-21 22:14:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:14:55,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-12-21 22:14:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:55,448 INFO L225 Difference]: With dead ends: 247 [2020-12-21 22:14:55,449 INFO L226 Difference]: Without dead ends: 214 [2020-12-21 22:14:55,449 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 22:14:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-21 22:14:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2020-12-21 22:14:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 22:14:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2020-12-21 22:14:55,465 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 131 [2020-12-21 22:14:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:55,465 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2020-12-21 22:14:55,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2020-12-21 22:14:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 22:14:55,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:55,466 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:55,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:14:55,681 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1275756781, now seen corresponding path program 4 times [2020-12-21 22:14:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:55,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034104780] [2020-12-21 22:14:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:55,690 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:55,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893565694] [2020-12-21 22:14:55,691 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 22:14:55,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:14:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:56,805 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 22:14:56,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034104780] [2020-12-21 22:14:56,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:56,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893565694] [2020-12-21 22:14:56,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:56,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-21 22:14:56,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443060512] [2020-12-21 22:14:56,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:14:56,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:14:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:14:56,808 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 25 states. [2020-12-21 22:14:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:57,473 INFO L93 Difference]: Finished difference Result 886 states and 1042 transitions. [2020-12-21 22:14:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:14:57,473 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2020-12-21 22:14:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:57,478 INFO L225 Difference]: With dead ends: 886 [2020-12-21 22:14:57,478 INFO L226 Difference]: Without dead ends: 818 [2020-12-21 22:14:57,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:14:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2020-12-21 22:14:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 179. [2020-12-21 22:14:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 22:14:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2020-12-21 22:14:57,498 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 136 [2020-12-21 22:14:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:57,499 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2020-12-21 22:14:57,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:14:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2020-12-21 22:14:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 22:14:57,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:57,507 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:57,721 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1031815848, now seen corresponding path program 5 times [2020-12-21 22:14:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:57,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827356597] [2020-12-21 22:14:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:57,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:57,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721972072] [2020-12-21 22:14:57,731 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 22:14:58,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-21 22:14:58,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:14:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:59,952 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 22:14:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827356597] [2020-12-21 22:14:59,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721972072] [2020-12-21 22:14:59,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:59,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:14:59,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871404580] [2020-12-21 22:14:59,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:14:59,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:14:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:14:59,955 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 28 states. [2020-12-21 22:15:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:00,682 INFO L93 Difference]: Finished difference Result 997 states and 1171 transitions. [2020-12-21 22:15:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:15:00,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-12-21 22:15:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:00,687 INFO L225 Difference]: With dead ends: 997 [2020-12-21 22:15:00,687 INFO L226 Difference]: Without dead ends: 929 [2020-12-21 22:15:00,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:15:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-12-21 22:15:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 194. [2020-12-21 22:15:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-21 22:15:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 212 transitions. [2020-12-21 22:15:00,709 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 212 transitions. Word has length 151 [2020-12-21 22:15:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:00,710 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 212 transitions. [2020-12-21 22:15:00,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:15:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 212 transitions. [2020-12-21 22:15:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 22:15:00,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:00,711 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:00,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:00,918 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1801633165, now seen corresponding path program 6 times [2020-12-21 22:15:00,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:00,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370126645] [2020-12-21 22:15:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:00,927 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:00,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332475670] [2020-12-21 22:15:00,928 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 22:15:01,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:15:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:15:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:01,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:01,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:01,612 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 22:15:01,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370126645] [2020-12-21 22:15:01,613 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:01,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332475670] [2020-12-21 22:15:01,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:01,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:15:01,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143837573] [2020-12-21 22:15:01,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:15:01,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:01,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:15:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:15:01,615 INFO L87 Difference]: Start difference. First operand 194 states and 212 transitions. Second operand 8 states. [2020-12-21 22:15:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:01,980 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2020-12-21 22:15:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:15:01,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-21 22:15:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:01,984 INFO L225 Difference]: With dead ends: 312 [2020-12-21 22:15:01,984 INFO L226 Difference]: Without dead ends: 279 [2020-12-21 22:15:01,985 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 22:15:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-21 22:15:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2020-12-21 22:15:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-21 22:15:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2020-12-21 22:15:02,003 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 166 [2020-12-21 22:15:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:02,003 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2020-12-21 22:15:02,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:15:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2020-12-21 22:15:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 22:15:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:02,004 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 25, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:02,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:15:02,210 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:02,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1258378476, now seen corresponding path program 4 times [2020-12-21 22:15:02,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:02,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989187933] [2020-12-21 22:15:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:02,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732151325] [2020-12-21 22:15:02,219 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 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 22:15:02,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:15:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:04,127 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 22:15:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989187933] [2020-12-21 22:15:04,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732151325] [2020-12-21 22:15:04,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:04,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:15:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280143730] [2020-12-21 22:15:04,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:15:04,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:15:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:15:04,129 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 32 states. [2020-12-21 22:15:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:05,062 INFO L93 Difference]: Finished difference Result 1165 states and 1372 transitions. [2020-12-21 22:15:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:15:05,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-12-21 22:15:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:05,067 INFO L225 Difference]: With dead ends: 1165 [2020-12-21 22:15:05,067 INFO L226 Difference]: Without dead ends: 1087 [2020-12-21 22:15:05,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:15:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-12-21 22:15:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 224. [2020-12-21 22:15:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-21 22:15:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2020-12-21 22:15:05,093 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 171 [2020-12-21 22:15:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:05,094 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2020-12-21 22:15:05,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:15:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2020-12-21 22:15:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:15:05,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:05,095 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 29, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:05,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:05,310 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash -294634156, now seen corresponding path program 5 times [2020-12-21 22:15:05,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:05,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274095600] [2020-12-21 22:15:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:05,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:05,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531097477] [2020-12-21 22:15:05,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:15:12,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-21 22:15:12,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:15:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:13,837 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 22:15:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274095600] [2020-12-21 22:15:13,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531097477] [2020-12-21 22:15:13,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:13,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-21 22:15:13,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172326711] [2020-12-21 22:15:13,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:15:13,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:15:13,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:15:13,842 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 36 states. [2020-12-21 22:15:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:15,369 INFO L93 Difference]: Finished difference Result 1313 states and 1544 transitions. [2020-12-21 22:15:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:15:15,371 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2020-12-21 22:15:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:15,377 INFO L225 Difference]: With dead ends: 1313 [2020-12-21 22:15:15,378 INFO L226 Difference]: Without dead ends: 1235 [2020-12-21 22:15:15,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:15:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-12-21 22:15:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 244. [2020-12-21 22:15:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-21 22:15:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2020-12-21 22:15:15,423 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 191 [2020-12-21 22:15:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:15,423 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2020-12-21 22:15:15,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:15:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2020-12-21 22:15:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-21 22:15:15,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:15,425 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:15,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:15:15,639 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1738682260, now seen corresponding path program 6 times [2020-12-21 22:15:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:15,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194323452] [2020-12-21 22:15:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:15,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:15,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536629082] [2020-12-21 22:15:15,649 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 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 22:15:16,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:15:16,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:15:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:16,162 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 22:15:16,163 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:16,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:16,178 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:16,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-21 22:15:16,212 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 22:15:16,213 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:16,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:16,226 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 22:15:16,226 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2020-12-21 22:15:16,752 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 22:15:16,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194323452] [2020-12-21 22:15:16,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:16,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536629082] [2020-12-21 22:15:16,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:16,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:15:16,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439298794] [2020-12-21 22:15:16,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:15:16,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:15:16,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:15:16,754 INFO L87 Difference]: Start difference. First operand 244 states and 266 transitions. Second operand 14 states. [2020-12-21 22:15:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:17,467 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2020-12-21 22:15:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:15:17,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2020-12-21 22:15:17,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:17,469 INFO L225 Difference]: With dead ends: 258 [2020-12-21 22:15:17,469 INFO L226 Difference]: Without dead ends: 256 [2020-12-21 22:15:17,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-21 22:15:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2020-12-21 22:15:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-21 22:15:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 272 transitions. [2020-12-21 22:15:17,492 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 272 transitions. Word has length 211 [2020-12-21 22:15:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:17,493 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 272 transitions. [2020-12-21 22:15:17,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:15:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 272 transitions. [2020-12-21 22:15:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 22:15:17,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:17,494 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:17,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:17,699 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:17,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1394624252, now seen corresponding path program 7 times [2020-12-21 22:15:17,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:17,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610356941] [2020-12-21 22:15:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:17,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:17,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570191003] [2020-12-21 22:15:17,710 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 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 22:15:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:15:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:19,790 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 22:15:19,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610356941] [2020-12-21 22:15:19,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:19,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570191003] [2020-12-21 22:15:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:19,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-21 22:15:19,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474137121] [2020-12-21 22:15:19,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:15:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:15:19,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:15:19,799 INFO L87 Difference]: Start difference. First operand 249 states and 272 transitions. Second operand 40 states. [2020-12-21 22:15:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:21,183 INFO L93 Difference]: Finished difference Result 1627 states and 1915 transitions. [2020-12-21 22:15:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:15:21,184 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2020-12-21 22:15:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:21,190 INFO L225 Difference]: With dead ends: 1627 [2020-12-21 22:15:21,190 INFO L226 Difference]: Without dead ends: 1544 [2020-12-21 22:15:21,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:15:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-12-21 22:15:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 269. [2020-12-21 22:15:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-21 22:15:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 292 transitions. [2020-12-21 22:15:21,222 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 292 transitions. Word has length 216 [2020-12-21 22:15:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:21,223 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 292 transitions. [2020-12-21 22:15:21,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:15:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 292 transitions. [2020-12-21 22:15:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-21 22:15:21,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:21,225 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 37, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:21,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:15:21,438 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash -906535748, now seen corresponding path program 8 times [2020-12-21 22:15:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:21,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300878490] [2020-12-21 22:15:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:21,448 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:21,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911250079] [2020-12-21 22:15:21,448 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 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 22:15:21,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:21,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 22:15:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:23,794 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 22:15:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300878490] [2020-12-21 22:15:23,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911250079] [2020-12-21 22:15:23,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:23,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-21 22:15:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664525386] [2020-12-21 22:15:23,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:15:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:15:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:15:23,797 INFO L87 Difference]: Start difference. First operand 269 states and 292 transitions. Second operand 44 states. [2020-12-21 22:15:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:25,663 INFO L93 Difference]: Finished difference Result 1795 states and 2111 transitions. [2020-12-21 22:15:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 22:15:25,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2020-12-21 22:15:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:25,672 INFO L225 Difference]: With dead ends: 1795 [2020-12-21 22:15:25,672 INFO L226 Difference]: Without dead ends: 1712 [2020-12-21 22:15:25,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:15:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2020-12-21 22:15:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 289. [2020-12-21 22:15:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-21 22:15:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 312 transitions. [2020-12-21 22:15:25,708 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 312 transitions. Word has length 236 [2020-12-21 22:15:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:25,709 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 312 transitions. [2020-12-21 22:15:25,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:15:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 312 transitions. [2020-12-21 22:15:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:15:25,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:25,711 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 22:15:25,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:15:25,925 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1848251004, now seen corresponding path program 9 times [2020-12-21 22:15:25,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:25,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551461396] [2020-12-21 22:15:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:25,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:25,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186530283] [2020-12-21 22:15:25,935 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 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 22:15:26,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:15:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:15:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:26,662 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 23 treesize of output 19 [2020-12-21 22:15:26,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:26,708 INFO L625 ElimStorePlain]: treesize reduction 55, result has 32.1 percent of original size [2020-12-21 22:15:26,709 INFO L515 ElimStorePlain]: Eliminatee |v_#memory_int_16| vanished before elimination [2020-12-21 22:15:26,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:26,710 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:26 [2020-12-21 22:15:26,742 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 31 treesize of output 15 [2020-12-21 22:15:26,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:26,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:26,759 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:26,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:18 [2020-12-21 22:15:31,459 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 22:15:31,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:31,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:31,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:31,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-21 22:15:31,587 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 22:15:31,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:31,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:31,609 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 22:15:31,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:19 [2020-12-21 22:15:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 414 proven. 178 refuted. 0 times theorem prover too weak. 4252 trivial. 0 not checked. [2020-12-21 22:15:31,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551461396] [2020-12-21 22:15:31,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:31,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186530283] [2020-12-21 22:15:31,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:31,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:15:31,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218057645] [2020-12-21 22:15:31,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:15:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:15:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=134, Unknown=2, NotChecked=0, Total=182 [2020-12-21 22:15:31,933 INFO L87 Difference]: Start difference. First operand 289 states and 312 transitions. Second operand 14 states. [2020-12-21 22:15:48,320 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~R~0 4294967296))) (and (= c_~N~0 1000) (= c_ULTIMATE.start_main_~R~0 4) (= 0 (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) .cse0) 4294967296)) (= (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) .cse0) 4294967296) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))))) is different from false [2020-12-21 22:15:50,532 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~R~0 4294967296))) (and (= c_~N~0 1000) (= c_ULTIMATE.start_main_~R~0 4) (= (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) .cse0) 4294967296) |c_ULTIMATE.start_main_#t~mem9|) (= 0 (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) .cse0) 4294967296)))) is different from false [2020-12-21 22:15:51,180 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-12-21 22:15:53,485 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-12-21 22:16:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:10,857 INFO L93 Difference]: Finished difference Result 567 states and 665 transitions. [2020-12-21 22:16:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:16:10,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 256 [2020-12-21 22:16:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:10,881 INFO L225 Difference]: With dead ends: 567 [2020-12-21 22:16:10,881 INFO L226 Difference]: Without dead ends: 484 [2020-12-21 22:16:10,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=106, Invalid=318, Unknown=4, NotChecked=78, Total=506 [2020-12-21 22:16:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-21 22:16:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 321. [2020-12-21 22:16:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-12-21 22:16:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 347 transitions. [2020-12-21 22:16:10,914 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 347 transitions. Word has length 256 [2020-12-21 22:16:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:10,914 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 347 transitions. [2020-12-21 22:16:10,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:16:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 347 transitions. [2020-12-21 22:16:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:16:10,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:10,916 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:11,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:16:11,120 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash -201136838, now seen corresponding path program 7 times [2020-12-21 22:16:11,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:11,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739300004] [2020-12-21 22:16:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:11,129 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:11,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913522514] [2020-12-21 22:16:11,130 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 22:16:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:16:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 22:16:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:14,589 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 22:16:14,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739300004] [2020-12-21 22:16:14,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:14,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913522514] [2020-12-21 22:16:14,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:14,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-21 22:16:14,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269628371] [2020-12-21 22:16:14,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 22:16:14,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:14,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 22:16:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:16:14,592 INFO L87 Difference]: Start difference. First operand 321 states and 347 transitions. Second operand 48 states. [2020-12-21 22:16:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:16,724 INFO L93 Difference]: Finished difference Result 2027 states and 2377 transitions. [2020-12-21 22:16:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 22:16:16,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 256 [2020-12-21 22:16:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:16,734 INFO L225 Difference]: With dead ends: 2027 [2020-12-21 22:16:16,734 INFO L226 Difference]: Without dead ends: 1912 [2020-12-21 22:16:16,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:16:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2020-12-21 22:16:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 341. [2020-12-21 22:16:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-21 22:16:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 367 transitions. [2020-12-21 22:16:16,776 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 367 transitions. Word has length 256 [2020-12-21 22:16:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:16,776 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 367 transitions. [2020-12-21 22:16:16,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 22:16:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 367 transitions. [2020-12-21 22:16:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-21 22:16:16,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:16,778 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 45, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:16,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:16:16,991 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash 595671802, now seen corresponding path program 8 times [2020-12-21 22:16:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:16,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873479580] [2020-12-21 22:16:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:17,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:17,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680487191] [2020-12-21 22:16:17,004 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 22:16:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:16:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 22:16:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:20,964 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 22:16:20,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873479580] [2020-12-21 22:16:20,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:20,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680487191] [2020-12-21 22:16:20,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:20,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-21 22:16:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406542207] [2020-12-21 22:16:20,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 22:16:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:20,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 22:16:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:16:20,968 INFO L87 Difference]: Start difference. First operand 341 states and 367 transitions. Second operand 52 states. [2020-12-21 22:16:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:23,545 INFO L93 Difference]: Finished difference Result 2195 states and 2573 transitions. [2020-12-21 22:16:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 22:16:23,548 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 276 [2020-12-21 22:16:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:23,555 INFO L225 Difference]: With dead ends: 2195 [2020-12-21 22:16:23,555 INFO L226 Difference]: Without dead ends: 2080 [2020-12-21 22:16:23,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:16:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-12-21 22:16:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 361. [2020-12-21 22:16:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-12-21 22:16:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 387 transitions. [2020-12-21 22:16:23,599 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 387 transitions. Word has length 276 [2020-12-21 22:16:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:23,599 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 387 transitions. [2020-12-21 22:16:23,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 22:16:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 387 transitions. [2020-12-21 22:16:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-21 22:16:23,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:23,601 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 49, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:23,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:16:23,816 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash -465882950, now seen corresponding path program 9 times [2020-12-21 22:16:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:23,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546764107] [2020-12-21 22:16:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:23,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:23,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976784742] [2020-12-21 22:16:23,825 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 22:16:24,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:16:24,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:16:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:24,364 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:16:24,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:16:24,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:16:24,669 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 22:16:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546764107] [2020-12-21 22:16:24,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976784742] [2020-12-21 22:16:24,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:24,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:16:24,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114973666] [2020-12-21 22:16:24,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:16:24,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:16:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:16:24,671 INFO L87 Difference]: Start difference. First operand 361 states and 387 transitions. Second operand 9 states. [2020-12-21 22:16:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:25,257 INFO L93 Difference]: Finished difference Result 572 states and 638 transitions. [2020-12-21 22:16:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:16:25,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2020-12-21 22:16:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:25,264 INFO L225 Difference]: With dead ends: 572 [2020-12-21 22:16:25,264 INFO L226 Difference]: Without dead ends: 534 [2020-12-21 22:16:25,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:16:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-21 22:16:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2020-12-21 22:16:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-21 22:16:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 375 transitions. [2020-12-21 22:16:25,300 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 375 transitions. Word has length 296 [2020-12-21 22:16:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:25,301 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 375 transitions. [2020-12-21 22:16:25,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:16:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 375 transitions. [2020-12-21 22:16:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-12-21 22:16:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:25,303 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 49, 6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:25,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:25,508 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 342617217, now seen corresponding path program 10 times [2020-12-21 22:16:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:25,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599648084] [2020-12-21 22:16:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:25,517 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:25,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320638236] [2020-12-21 22:16:25,517 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 22:16:28,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:16:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-21 22:16:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7013 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:16:33,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599648084] [2020-12-21 22:16:33,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:33,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320638236] [2020-12-21 22:16:33,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:33,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-21 22:16:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756085486] [2020-12-21 22:16:33,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-21 22:16:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-21 22:16:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 22:16:33,387 INFO L87 Difference]: Start difference. First operand 351 states and 375 transitions. Second operand 57 states. [2020-12-21 22:16:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:36,301 INFO L93 Difference]: Finished difference Result 2385 states and 2795 transitions. [2020-12-21 22:16:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-21 22:16:36,303 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 301 [2020-12-21 22:16:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:36,311 INFO L225 Difference]: With dead ends: 2385 [2020-12-21 22:16:36,311 INFO L226 Difference]: Without dead ends: 2280 [2020-12-21 22:16:36,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 22:16:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2020-12-21 22:16:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 376. [2020-12-21 22:16:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-12-21 22:16:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 400 transitions. [2020-12-21 22:16:36,354 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 400 transitions. Word has length 301 [2020-12-21 22:16:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:36,354 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 400 transitions. [2020-12-21 22:16:36,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-21 22:16:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 400 transitions. [2020-12-21 22:16:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-21 22:16:36,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:36,356 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 59, 54, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:36,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:36,570 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2074125814, now seen corresponding path program 11 times [2020-12-21 22:16:36,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:36,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753986270] [2020-12-21 22:16:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:36,581 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310435867] [2020-12-21 22:16:36,582 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