/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/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:12:58,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:12:58,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:12:58,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:12:58,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:12:58,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:12:58,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:12:58,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:12:58,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:12:58,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:12:58,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:12:58,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:12:58,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:12:58,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:12:58,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:12:58,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:12:58,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:12:58,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:12:58,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:12:58,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:12:58,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:12:58,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:12:58,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:12:58,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:12:58,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:12:58,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:12:58,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:12:58,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:12:58,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:12:58,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:12:58,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:12:58,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:12:58,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:12:58,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:12:58,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:12:58,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:12:58,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:12:58,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:12:58,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:12:58,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:12:58,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:12:58,646 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:12:58,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:12:58,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:12:58,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:12:58,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:12:58,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:12:58,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:12:58,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:12:58,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:12:58,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:12:58,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:12:58,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:12:58,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:12:58,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:12:58,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:12:58,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:12:58,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:12:58,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:12:58,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:12:58,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:12:58,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:12:58,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:12:59,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:12:59,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:12:59,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:12:59,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:12:59,091 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:12:59,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2020-12-22 05:12:59,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea3e303d/eaa789f44bd745438574e5a8ea8edb72/FLAGd5451188a [2020-12-22 05:12:59,856 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:12:59,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2020-12-22 05:12:59,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea3e303d/eaa789f44bd745438574e5a8ea8edb72/FLAGd5451188a [2020-12-22 05:13:00,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ea3e303d/eaa789f44bd745438574e5a8ea8edb72 [2020-12-22 05:13:00,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:13:00,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:13:00,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:13:00,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:13:00,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:13:00,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fead894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00, skipping insertion in model container [2020-12-22 05:13:00,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:13:00,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:13:00,429 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/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2020-12-22 05:13:00,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:13:00,478 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:13:00,497 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/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2020-12-22 05:13:00,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:13:00,570 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:13:00,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00 WrapperNode [2020-12-22 05:13:00,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:13:00,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:13:00,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:13:00,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:13:00,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:13:00,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:13:00,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:13:00,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:13:00,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (1/1) ... [2020-12-22 05:13:00,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:13:00,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:13:00,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:13:00,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:13:00,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (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 [2020-12-22 05:13:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:13:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:13:00,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:13:00,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:13:01,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:13:01,415 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2020-12-22 05:13:01,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:13:01 BoogieIcfgContainer [2020-12-22 05:13:01,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:13:01,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:13:01,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:13:01,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:13:01,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:13:00" (1/3) ... [2020-12-22 05:13:01,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1a320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:13:01, skipping insertion in model container [2020-12-22 05:13:01,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:13:00" (2/3) ... [2020-12-22 05:13:01,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1a320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:13:01, skipping insertion in model container [2020-12-22 05:13:01,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:13:01" (3/3) ... [2020-12-22 05:13:01,426 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2020-12-22 05:13:01,433 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:13:01,438 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 05:13:01,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 05:13:01,485 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:13:01,485 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:13:01,485 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:13:01,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:13:01,486 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:13:01,486 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:13:01,486 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:13:01,486 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:13:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-12-22 05:13:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:13:01,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:01,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:01,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2020-12-22 05:13:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:01,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432581811] [2020-12-22 05:13:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:01,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432581811] [2020-12-22 05:13:01,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:01,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:13:01,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681013015] [2020-12-22 05:13:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:13:01,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:13:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:13:01,712 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-12-22 05:13:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:01,735 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-12-22 05:13:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:13:01,737 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-22 05:13:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:01,746 INFO L225 Difference]: With dead ends: 83 [2020-12-22 05:13:01,747 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 05:13:01,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:13:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 05:13:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 05:13:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 05:13:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-22 05:13:01,791 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-12-22 05:13:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:01,792 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-22 05:13:01,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:13:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-22 05:13:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:13:01,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:01,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:01,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:13:01,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2020-12-22 05:13:01,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:01,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737045670] [2020-12-22 05:13:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:01,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132091352] [2020-12-22 05:13:01,817 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 [2020-12-22 05:13:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:13:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:02,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737045670] [2020-12-22 05:13:02,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:02,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132091352] [2020-12-22 05:13:02,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:02,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:13:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156379919] [2020-12-22 05:13:02,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:13:02,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:13:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:13:02,026 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-12-22 05:13:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:02,049 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-22 05:13:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:13:02,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 05:13:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:02,051 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:13:02,052 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:13:02,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:13:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:13:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 05:13:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 05:13:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-22 05:13:02,060 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-12-22 05:13:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:02,061 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-22 05:13:02,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:13:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-22 05:13:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:13:02,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:02,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:02,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:13:02,277 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2020-12-22 05:13:02,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:02,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555840877] [2020-12-22 05:13:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:02,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112237563] [2020-12-22 05:13:02,296 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 [2020-12-22 05:13:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:13:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555840877] [2020-12-22 05:13:02,427 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:02,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112237563] [2020-12-22 05:13:02,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:02,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:13:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605339200] [2020-12-22 05:13:02,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:13:02,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:13:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:13:02,433 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-12-22 05:13:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:02,550 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-22 05:13:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:13:02,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:13:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:02,553 INFO L225 Difference]: With dead ends: 69 [2020-12-22 05:13:02,553 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 05:13:02,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 05:13:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-12-22 05:13:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 05:13:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-22 05:13:02,562 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-12-22 05:13:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:02,563 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-22 05:13:02,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:13:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-22 05:13:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:13:02,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:02,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:02,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:02,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-12-22 05:13:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:02,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926938526] [2020-12-22 05:13:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:02,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:02,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985263446] [2020-12-22 05:13:02,810 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 [2020-12-22 05:13:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:13:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:03,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926938526] [2020-12-22 05:13:03,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:03,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985263446] [2020-12-22 05:13:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:13:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202313275] [2020-12-22 05:13:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:03,040 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-12-22 05:13:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:03,275 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-22 05:13:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:03,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 05:13:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:03,278 INFO L225 Difference]: With dead ends: 80 [2020-12-22 05:13:03,278 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 05:13:03,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:13:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 05:13:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-12-22 05:13:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 05:13:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-22 05:13:03,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-12-22 05:13:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:03,288 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-22 05:13:03,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-22 05:13:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:13:03,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:03,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:03,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:03,504 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2020-12-22 05:13:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:03,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813627076] [2020-12-22 05:13:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:03,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:03,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893921268] [2020-12-22 05:13:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:13:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813627076] [2020-12-22 05:13:03,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:03,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893921268] [2020-12-22 05:13:03,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:03,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:13:03,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792198063] [2020-12-22 05:13:03,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:03,777 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-12-22 05:13:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:04,038 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-22 05:13:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:04,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-22 05:13:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:04,041 INFO L225 Difference]: With dead ends: 64 [2020-12-22 05:13:04,042 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 05:13:04,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 05:13:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-12-22 05:13:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:13:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-22 05:13:04,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2020-12-22 05:13:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:04,055 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-22 05:13:04,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-22 05:13:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:13:04,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:04,057 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:04,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:04,271 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2020-12-22 05:13:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:04,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622897714] [2020-12-22 05:13:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:04,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:04,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030724049] [2020-12-22 05:13:04,299 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 [2020-12-22 05:13:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:13:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622897714] [2020-12-22 05:13:04,434 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030724049] [2020-12-22 05:13:04,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:04,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:13:04,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733897453] [2020-12-22 05:13:04,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:13:04,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:13:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:13:04,436 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 5 states. [2020-12-22 05:13:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:04,462 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-12-22 05:13:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:13:04,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-22 05:13:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:04,465 INFO L225 Difference]: With dead ends: 85 [2020-12-22 05:13:04,466 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 05:13:04,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:13:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 05:13:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 05:13:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:13:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-22 05:13:04,476 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2020-12-22 05:13:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:04,477 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-22 05:13:04,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:13:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-22 05:13:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:13:04,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:04,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:04,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:13:04,692 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2020-12-22 05:13:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:04,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248441972] [2020-12-22 05:13:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:04,708 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:04,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257921988] [2020-12-22 05:13:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:13:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:04,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248441972] [2020-12-22 05:13:04,884 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:04,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257921988] [2020-12-22 05:13:04,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:04,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:13:04,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88201211] [2020-12-22 05:13:04,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:04,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:04,887 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 8 states. [2020-12-22 05:13:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:05,067 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 05:13:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:05,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-22 05:13:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:05,074 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:13:05,074 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:13:05,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:13:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-22 05:13:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:13:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-22 05:13:05,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-22 05:13:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:05,098 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-22 05:13:05,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-22 05:13:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 05:13:05,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:05,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:05,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:05,313 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2020-12-22 05:13:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:05,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955039451] [2020-12-22 05:13:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:05,333 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:05,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856848049] [2020-12-22 05:13:05,334 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 [2020-12-22 05:13:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 05:13:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955039451] [2020-12-22 05:13:05,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:05,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856848049] [2020-12-22 05:13:05,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:05,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:13:05,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695773192] [2020-12-22 05:13:05,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:13:05,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:05,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:13:05,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:13:05,639 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 9 states. [2020-12-22 05:13:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:07,860 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-12-22 05:13:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:13:07,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-22 05:13:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:07,863 INFO L225 Difference]: With dead ends: 67 [2020-12-22 05:13:07,864 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 05:13:07,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:13:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 05:13:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-12-22 05:13:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:13:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-22 05:13:07,891 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-12-22 05:13:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:07,891 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-22 05:13:07,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:13:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-22 05:13:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 05:13:07,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:07,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:08,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:08,112 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:08,114 INFO L82 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2020-12-22 05:13:08,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:08,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562453952] [2020-12-22 05:13:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:08,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:08,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952190137] [2020-12-22 05:13:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:13:08,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:08,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562453952] [2020-12-22 05:13:08,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952190137] [2020-12-22 05:13:08,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:08,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:13:08,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054409033] [2020-12-22 05:13:08,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:13:08,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:13:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:13:08,291 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 6 states. [2020-12-22 05:13:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:08,485 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-12-22 05:13:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:13:08,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-22 05:13:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:08,488 INFO L225 Difference]: With dead ends: 108 [2020-12-22 05:13:08,488 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 05:13:08,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:13:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 05:13:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-12-22 05:13:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 05:13:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-12-22 05:13:08,515 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2020-12-22 05:13:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:08,516 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-12-22 05:13:08,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:13:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-12-22 05:13:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:13:08,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:08,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:08,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:13:08,735 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:08,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2020-12-22 05:13:08,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:08,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474145243] [2020-12-22 05:13:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:08,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:08,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615201388] [2020-12-22 05:13:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:13:08,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:08,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474145243] [2020-12-22 05:13:08,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:08,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615201388] [2020-12-22 05:13:08,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:08,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:13:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897925566] [2020-12-22 05:13:08,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:13:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:13:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:13:08,911 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 6 states. [2020-12-22 05:13:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:08,952 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-12-22 05:13:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:13:08,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-22 05:13:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:08,954 INFO L225 Difference]: With dead ends: 89 [2020-12-22 05:13:08,954 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 05:13:08,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 05:13:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-22 05:13:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 05:13:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-12-22 05:13:08,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2020-12-22 05:13:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:08,965 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-12-22 05:13:08,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:13:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-12-22 05:13:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 05:13:08,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:08,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:09,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:09,181 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:09,182 INFO L82 PathProgramCache]: Analyzing trace with hash -134066994, now seen corresponding path program 1 times [2020-12-22 05:13:09,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97166111] [2020-12-22 05:13:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:09,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:09,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551119017] [2020-12-22 05:13:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:13:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:09,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97166111] [2020-12-22 05:13:09,346 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:09,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551119017] [2020-12-22 05:13:09,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:09,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:13:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277193072] [2020-12-22 05:13:09,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:13:09,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:13:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:09,348 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 7 states. [2020-12-22 05:13:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:09,622 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2020-12-22 05:13:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:13:09,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-22 05:13:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:09,624 INFO L225 Difference]: With dead ends: 232 [2020-12-22 05:13:09,624 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 05:13:09,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:13:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 05:13:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2020-12-22 05:13:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 05:13:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-12-22 05:13:09,643 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2020-12-22 05:13:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:09,643 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-12-22 05:13:09,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:13:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-12-22 05:13:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:13:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:09,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:09,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:09,858 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 966792015, now seen corresponding path program 1 times [2020-12-22 05:13:09,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:09,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061902942] [2020-12-22 05:13:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:09,871 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:09,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881316056] [2020-12-22 05:13:09,874 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 [2020-12-22 05:13:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:13:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061902942] [2020-12-22 05:13:10,022 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:10,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881316056] [2020-12-22 05:13:10,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:10,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:13:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040428995] [2020-12-22 05:13:10,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:13:10,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:10,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:13:10,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:13:10,024 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 6 states. [2020-12-22 05:13:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:10,080 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-12-22 05:13:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:13:10,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-22 05:13:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:10,084 INFO L225 Difference]: With dead ends: 179 [2020-12-22 05:13:10,084 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 05:13:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 05:13:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-12-22 05:13:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 05:13:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-12-22 05:13:10,101 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2020-12-22 05:13:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:10,101 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-12-22 05:13:10,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:13:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-12-22 05:13:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 05:13:10,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:10,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:10,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:13:10,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash 302394158, now seen corresponding path program 1 times [2020-12-22 05:13:10,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:10,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115290370] [2020-12-22 05:13:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:10,336 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:10,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543149157] [2020-12-22 05:13:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:10,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:13:10,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115290370] [2020-12-22 05:13:10,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:10,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543149157] [2020-12-22 05:13:10,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:10,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:13:10,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286906003] [2020-12-22 05:13:10,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:10,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:10,620 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 8 states. [2020-12-22 05:13:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:10,804 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2020-12-22 05:13:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:10,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-22 05:13:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:10,806 INFO L225 Difference]: With dead ends: 208 [2020-12-22 05:13:10,807 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 05:13:10,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:13:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 05:13:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2020-12-22 05:13:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 05:13:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 250 transitions. [2020-12-22 05:13:10,831 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 250 transitions. Word has length 32 [2020-12-22 05:13:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:10,832 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 250 transitions. [2020-12-22 05:13:10,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2020-12-22 05:13:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 05:13:10,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:10,833 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:11,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:13:11,048 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2001825622, now seen corresponding path program 1 times [2020-12-22 05:13:11,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:11,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892151280] [2020-12-22 05:13:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:11,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:11,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843377029] [2020-12-22 05:13:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:13:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:11,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892151280] [2020-12-22 05:13:11,214 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:11,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843377029] [2020-12-22 05:13:11,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:11,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:13:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440581458] [2020-12-22 05:13:11,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:13:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:13:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:11,217 INFO L87 Difference]: Start difference. First operand 189 states and 250 transitions. Second operand 7 states. [2020-12-22 05:13:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:11,299 INFO L93 Difference]: Finished difference Result 327 states and 437 transitions. [2020-12-22 05:13:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:11,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-22 05:13:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:11,302 INFO L225 Difference]: With dead ends: 327 [2020-12-22 05:13:11,302 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 05:13:11,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:13:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 05:13:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-22 05:13:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 05:13:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2020-12-22 05:13:11,334 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 34 [2020-12-22 05:13:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:11,335 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2020-12-22 05:13:11,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:13:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2020-12-22 05:13:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 05:13:11,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:11,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:11,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 05:13:11,551 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1456833039, now seen corresponding path program 1 times [2020-12-22 05:13:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:11,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226793447] [2020-12-22 05:13:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:11,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:11,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951557594] [2020-12-22 05:13:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:11,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 05:13:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:11,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226793447] [2020-12-22 05:13:11,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:11,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951557594] [2020-12-22 05:13:11,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:11,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:13:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086119349] [2020-12-22 05:13:11,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:13:11,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:13:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:13:11,833 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 10 states. [2020-12-22 05:13:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:12,169 INFO L93 Difference]: Finished difference Result 208 states and 265 transitions. [2020-12-22 05:13:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:13:12,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 05:13:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:12,171 INFO L225 Difference]: With dead ends: 208 [2020-12-22 05:13:12,171 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 05:13:12,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:13:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 05:13:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2020-12-22 05:13:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 05:13:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2020-12-22 05:13:12,203 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 34 [2020-12-22 05:13:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:12,204 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2020-12-22 05:13:12,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:13:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2020-12-22 05:13:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 05:13:12,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:12,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:12,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:12,419 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash 142945620, now seen corresponding path program 1 times [2020-12-22 05:13:12,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:12,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313896665] [2020-12-22 05:13:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:12,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:12,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796884825] [2020-12-22 05:13:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 05:13:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313896665] [2020-12-22 05:13:12,927 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796884825] [2020-12-22 05:13:12,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:12,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:13:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401403342] [2020-12-22 05:13:12,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:13:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:13:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:13:12,929 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand 13 states. [2020-12-22 05:13:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:13,435 INFO L93 Difference]: Finished difference Result 225 states and 288 transitions. [2020-12-22 05:13:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 05:13:13,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-22 05:13:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:13,437 INFO L225 Difference]: With dead ends: 225 [2020-12-22 05:13:13,438 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 05:13:13,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-22 05:13:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 05:13:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-12-22 05:13:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 05:13:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2020-12-22 05:13:13,461 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 36 [2020-12-22 05:13:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:13,461 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2020-12-22 05:13:13,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:13:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2020-12-22 05:13:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 05:13:13,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:13,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:13,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 05:13:13,676 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1084150885, now seen corresponding path program 2 times [2020-12-22 05:13:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520530383] [2020-12-22 05:13:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:13,686 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:13,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561627104] [2020-12-22 05:13:13,686 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 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 [2020-12-22 05:13:13,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:13:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:13,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 05:13:13,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:13,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520530383] [2020-12-22 05:13:13,980 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561627104] [2020-12-22 05:13:13,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:13,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 05:13:13,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253701911] [2020-12-22 05:13:13,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:13:13,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:13,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:13:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:13,982 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand 11 states. [2020-12-22 05:13:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:14,303 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-12-22 05:13:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:13:14,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-22 05:13:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:14,305 INFO L225 Difference]: With dead ends: 212 [2020-12-22 05:13:14,305 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 05:13:14,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-22 05:13:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 05:13:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 199. [2020-12-22 05:13:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 05:13:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2020-12-22 05:13:14,329 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 36 [2020-12-22 05:13:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:14,329 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2020-12-22 05:13:14,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:13:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2020-12-22 05:13:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 05:13:14,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:14,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:14,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 05:13:14,544 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1970211809, now seen corresponding path program 1 times [2020-12-22 05:13:14,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:14,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006247620] [2020-12-22 05:13:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:14,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:14,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028825958] [2020-12-22 05:13:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 05:13:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:13:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006247620] [2020-12-22 05:13:14,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028825958] [2020-12-22 05:13:14,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:14,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:13:14,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973425447] [2020-12-22 05:13:14,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:13:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:13:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:14,689 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand 7 states. [2020-12-22 05:13:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:14,747 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-22 05:13:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:13:14,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-12-22 05:13:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:14,749 INFO L225 Difference]: With dead ends: 206 [2020-12-22 05:13:14,749 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 05:13:14,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:13:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 05:13:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-22 05:13:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 05:13:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 259 transitions. [2020-12-22 05:13:14,787 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 259 transitions. Word has length 38 [2020-12-22 05:13:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:14,787 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 259 transitions. [2020-12-22 05:13:14,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:13:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 259 transitions. [2020-12-22 05:13:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 05:13:14,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:14,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:15,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 05:13:15,002 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -947205511, now seen corresponding path program 1 times [2020-12-22 05:13:15,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:15,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063484855] [2020-12-22 05:13:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:15,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:15,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969907508] [2020-12-22 05:13:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 05:13:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:15,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063484855] [2020-12-22 05:13:15,347 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:15,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969907508] [2020-12-22 05:13:15,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:15,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 05:13:15,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774371100] [2020-12-22 05:13:15,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:13:15,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:13:15,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:15,349 INFO L87 Difference]: Start difference. First operand 202 states and 259 transitions. Second operand 11 states. [2020-12-22 05:13:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:16,102 INFO L93 Difference]: Finished difference Result 239 states and 302 transitions. [2020-12-22 05:13:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:13:16,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-12-22 05:13:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:16,104 INFO L225 Difference]: With dead ends: 239 [2020-12-22 05:13:16,104 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 05:13:16,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-12-22 05:13:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 05:13:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2020-12-22 05:13:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 05:13:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2020-12-22 05:13:16,127 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 39 [2020-12-22 05:13:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:16,127 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2020-12-22 05:13:16,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:13:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2020-12-22 05:13:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 05:13:16,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:16,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:16,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:16,342 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash 170255994, now seen corresponding path program 2 times [2020-12-22 05:13:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:16,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347882895] [2020-12-22 05:13:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:16,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:16,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535309405] [2020-12-22 05:13:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:16,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:13:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:13:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:16,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347882895] [2020-12-22 05:13:16,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:16,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535309405] [2020-12-22 05:13:16,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:16,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:13:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58400015] [2020-12-22 05:13:16,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:16,529 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand 8 states. [2020-12-22 05:13:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:16,606 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2020-12-22 05:13:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:13:16,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-22 05:13:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:16,608 INFO L225 Difference]: With dead ends: 250 [2020-12-22 05:13:16,608 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 05:13:16,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 05:13:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2020-12-22 05:13:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-22 05:13:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2020-12-22 05:13:16,632 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2020-12-22 05:13:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:16,632 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2020-12-22 05:13:16,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2020-12-22 05:13:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 05:13:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:16,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:16,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:16,846 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1229525663, now seen corresponding path program 1 times [2020-12-22 05:13:16,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:16,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727448986] [2020-12-22 05:13:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:16,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:16,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108453631] [2020-12-22 05:13:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:16,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:13:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727448986] [2020-12-22 05:13:17,024 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108453631] [2020-12-22 05:13:17,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:17,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:13:17,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97577651] [2020-12-22 05:13:17,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:13:17,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:13:17,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:13:17,026 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand 8 states. [2020-12-22 05:13:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:17,105 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2020-12-22 05:13:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:13:17,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 05:13:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:17,107 INFO L225 Difference]: With dead ends: 368 [2020-12-22 05:13:17,108 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 05:13:17,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:13:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 05:13:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-12-22 05:13:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 05:13:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2020-12-22 05:13:17,131 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2020-12-22 05:13:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:17,131 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2020-12-22 05:13:17,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:13:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2020-12-22 05:13:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 05:13:17,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:17,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:17,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 05:13:17,346 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -613640578, now seen corresponding path program 2 times [2020-12-22 05:13:17,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:17,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791918637] [2020-12-22 05:13:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:17,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:17,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125350790] [2020-12-22 05:13:17,355 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 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 [2020-12-22 05:13:17,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:13:17,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:13:17,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:17,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791918637] [2020-12-22 05:13:17,501 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:17,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125350790] [2020-12-22 05:13:17,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:13:17,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:13:17,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966876262] [2020-12-22 05:13:17,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:13:17,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:13:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:13:17,503 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand 5 states. [2020-12-22 05:13:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:17,651 INFO L93 Difference]: Finished difference Result 465 states and 602 transitions. [2020-12-22 05:13:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:13:17,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 05:13:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:17,655 INFO L225 Difference]: With dead ends: 465 [2020-12-22 05:13:17,655 INFO L226 Difference]: Without dead ends: 364 [2020-12-22 05:13:17,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:13:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-22 05:13:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2020-12-22 05:13:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 05:13:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2020-12-22 05:13:17,685 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 46 [2020-12-22 05:13:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:17,686 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2020-12-22 05:13:17,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:13:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2020-12-22 05:13:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 05:13:17,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:17,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:17,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 05:13:17,901 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2041640631, now seen corresponding path program 1 times [2020-12-22 05:13:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:17,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962041268] [2020-12-22 05:13:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:17,910 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:17,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994077732] [2020-12-22 05:13:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:13:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:13:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 05:13:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962041268] [2020-12-22 05:13:18,641 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994077732] [2020-12-22 05:13:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:18,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:13:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815676492] [2020-12-22 05:13:18,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:13:18,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:13:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:13:18,643 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand 13 states. [2020-12-22 05:13:21,207 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 05:13:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:27,338 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2020-12-22 05:13:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 05:13:27,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-22 05:13:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:27,341 INFO L225 Difference]: With dead ends: 306 [2020-12-22 05:13:27,341 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 05:13:27,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-12-22 05:13:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 05:13:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2020-12-22 05:13:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 05:13:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2020-12-22 05:13:27,370 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 46 [2020-12-22 05:13:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:27,371 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2020-12-22 05:13:27,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:13:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2020-12-22 05:13:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 05:13:27,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:27,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:27,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:27,586 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1100435366, now seen corresponding path program 3 times [2020-12-22 05:13:27,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:27,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384662799] [2020-12-22 05:13:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:27,595 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:27,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252976344] [2020-12-22 05:13:27,596 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 [2020-12-22 05:13:27,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:13:27,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:13:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 05:13:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384662799] [2020-12-22 05:13:27,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252976344] [2020-12-22 05:13:27,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:27,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:13:27,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269809399] [2020-12-22 05:13:27,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:13:27,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:27,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:13:27,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:13:27,745 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand 5 states. [2020-12-22 05:13:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:27,867 INFO L93 Difference]: Finished difference Result 286 states and 365 transitions. [2020-12-22 05:13:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:13:27,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 05:13:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:27,869 INFO L225 Difference]: With dead ends: 286 [2020-12-22 05:13:27,869 INFO L226 Difference]: Without dead ends: 284 [2020-12-22 05:13:27,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:13:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-22 05:13:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2020-12-22 05:13:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 05:13:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2020-12-22 05:13:27,906 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 46 [2020-12-22 05:13:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:27,906 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2020-12-22 05:13:27,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:13:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2020-12-22 05:13:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 05:13:27,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:27,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:28,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 05:13:28,121 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash -316772764, now seen corresponding path program 2 times [2020-12-22 05:13:28,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:28,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476101819] [2020-12-22 05:13:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:28,130 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:28,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40312569] [2020-12-22 05:13:28,131 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 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 [2020-12-22 05:13:28,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:13:28,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 05:13:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:28,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476101819] [2020-12-22 05:13:28,587 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:28,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40312569] [2020-12-22 05:13:28,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:28,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:13:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975540993] [2020-12-22 05:13:28,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:13:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:13:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:13:28,589 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand 13 states. [2020-12-22 05:13:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:29,479 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2020-12-22 05:13:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:13:29,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-22 05:13:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:29,481 INFO L225 Difference]: With dead ends: 272 [2020-12-22 05:13:29,481 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 05:13:29,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-12-22 05:13:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 05:13:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-22 05:13:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 05:13:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2020-12-22 05:13:29,519 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 49 [2020-12-22 05:13:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:29,520 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2020-12-22 05:13:29,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:13:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2020-12-22 05:13:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 05:13:29,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:29,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:29,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:13:29,733 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -231890065, now seen corresponding path program 2 times [2020-12-22 05:13:29,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:29,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915747121] [2020-12-22 05:13:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:29,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:29,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450346198] [2020-12-22 05:13:29,742 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 [2020-12-22 05:13:29,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:13:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:13:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 05:13:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:13:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:13:29,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915747121] [2020-12-22 05:13:29,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:13:29,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450346198] [2020-12-22 05:13:29,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:13:29,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:13:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544963002] [2020-12-22 05:13:29,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:13:29,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:13:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:13:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:13:29,936 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand 9 states. [2020-12-22 05:13:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:13:30,066 INFO L93 Difference]: Finished difference Result 297 states and 361 transitions. [2020-12-22 05:13:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:13:30,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-12-22 05:13:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:13:30,068 INFO L225 Difference]: With dead ends: 297 [2020-12-22 05:13:30,069 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 05:13:30,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:13:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 05:13:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2020-12-22 05:13:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-22 05:13:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2020-12-22 05:13:30,111 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 52 [2020-12-22 05:13:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:13:30,111 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2020-12-22 05:13:30,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:13:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2020-12-22 05:13:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 05:13:30,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:13:30,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:13:30,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 05:13:30,341 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:13:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:13:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1401161001, now seen corresponding path program 3 times [2020-12-22 05:13:30,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:13:30,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471831210] [2020-12-22 05:13:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:13:30,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:13:30,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563032654] [2020-12-22 05:13:30,363 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