/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/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:44:39,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:44:39,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:44:39,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:44:39,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:44:39,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:44:39,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:44:39,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:44:39,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:44:39,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:44:39,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:44:39,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:44:39,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:44:39,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:44:39,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:44:39,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:44:39,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:44:39,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:44:39,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:44:39,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:44:39,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:44:39,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:44:39,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:44:39,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:44:39,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:44:39,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:44:39,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:44:39,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:44:39,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:44:39,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:44:39,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:44:39,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:44:39,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:44:39,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:44:39,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:44:39,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:44:39,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:44:39,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:44:39,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:44:39,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:44:39,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:44:39,725 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:44:39,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:44:39,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:44:39,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:44:39,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:44:39,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:44:39,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:44:39,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:44:39,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:44:39,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:44:39,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:44:39,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:44:39,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:44:39,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:44:39,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:44:39,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:44:39,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:44:39,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:44:39,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:44:39,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:44:39,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:44:39,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:44:40,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:44:40,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:44:40,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:44:40,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:44:40,295 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:44:40,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:44:40,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8eba9d2/e5fbcd2e8fee42d0a1e0bdb8595d060b/FLAG833c449b2 [2020-12-22 08:44:41,080 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:44:41,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:44:41,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8eba9d2/e5fbcd2e8fee42d0a1e0bdb8595d060b/FLAG833c449b2 [2020-12-22 08:44:41,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8eba9d2/e5fbcd2e8fee42d0a1e0bdb8595d060b [2020-12-22 08:44:41,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:44:41,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:44:41,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:44:41,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:44:41,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:44:41,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:44:41" (1/1) ... [2020-12-22 08:44:41,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448134a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:41, skipping insertion in model container [2020-12-22 08:44:41,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:44:41" (1/1) ... [2020-12-22 08:44:41,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:44:41,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:44:41,905 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/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5367,5380] [2020-12-22 08:44:41,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:44:41,999 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:44:42,076 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/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5367,5380] [2020-12-22 08:44:42,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:44:42,124 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:44:42,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42 WrapperNode [2020-12-22 08:44:42,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:44:42,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:44:42,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:44:42,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:44:42,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:44:42,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:44:42,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:44:42,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:44:42,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (1/1) ... [2020-12-22 08:44:42,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:44:42,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:44:42,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:44:42,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:44:42,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (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 08:44:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:44:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:44:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:44:42,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:44:43,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:44:43,590 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:44:43,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:44:43 BoogieIcfgContainer [2020-12-22 08:44:43,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:44:43,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:44:43,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:44:43,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:44:43,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:44:41" (1/3) ... [2020-12-22 08:44:43,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b3b52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:44:43, skipping insertion in model container [2020-12-22 08:44:43,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:44:42" (2/3) ... [2020-12-22 08:44:43,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b3b52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:44:43, skipping insertion in model container [2020-12-22 08:44:43,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:44:43" (3/3) ... [2020-12-22 08:44:43,613 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:44:43,621 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:44:43,628 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:44:43,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:44:43,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:44:43,700 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:44:43,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:44:43,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:44:43,701 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:44:43,701 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:44:43,701 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:44:43,701 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:44:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-12-22 08:44:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:44:43,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:43,731 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:43,732 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -857023919, now seen corresponding path program 1 times [2020-12-22 08:44:43,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934100108] [2020-12-22 08:44:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:44,208 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 08:44:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934100108] [2020-12-22 08:44:44,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:44,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303088487] [2020-12-22 08:44:44,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,237 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 3 states. [2020-12-22 08:44:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:44,314 INFO L93 Difference]: Finished difference Result 215 states and 350 transitions. [2020-12-22 08:44:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:44,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:44:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:44,331 INFO L225 Difference]: With dead ends: 215 [2020-12-22 08:44:44,331 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 08:44:44,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 08:44:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-12-22 08:44:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 08:44:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 209 transitions. [2020-12-22 08:44:44,396 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 209 transitions. Word has length 59 [2020-12-22 08:44:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:44,397 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 209 transitions. [2020-12-22 08:44:44,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 209 transitions. [2020-12-22 08:44:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:44:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:44,401 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:44,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:44:44,401 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1265777508, now seen corresponding path program 1 times [2020-12-22 08:44:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741730542] [2020-12-22 08:44:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:44,577 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 08:44:44,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741730542] [2020-12-22 08:44:44,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:44,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:44,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222817948] [2020-12-22 08:44:44,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:44,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,583 INFO L87 Difference]: Start difference. First operand 144 states and 209 transitions. Second operand 3 states. [2020-12-22 08:44:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:44,646 INFO L93 Difference]: Finished difference Result 348 states and 533 transitions. [2020-12-22 08:44:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:44,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:44:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:44,651 INFO L225 Difference]: With dead ends: 348 [2020-12-22 08:44:44,654 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 08:44:44,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 08:44:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-12-22 08:44:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-22 08:44:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 355 transitions. [2020-12-22 08:44:44,732 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 355 transitions. Word has length 60 [2020-12-22 08:44:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:44,732 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 355 transitions. [2020-12-22 08:44:44,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 355 transitions. [2020-12-22 08:44:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:44:44,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:44,735 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:44,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:44:44,736 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash -943758039, now seen corresponding path program 1 times [2020-12-22 08:44:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:44,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897368904] [2020-12-22 08:44:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:44,850 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 08:44:44,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897368904] [2020-12-22 08:44:44,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:44,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:44,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581241221] [2020-12-22 08:44:44,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:44,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,860 INFO L87 Difference]: Start difference. First operand 236 states and 355 transitions. Second operand 3 states. [2020-12-22 08:44:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:44,966 INFO L93 Difference]: Finished difference Result 608 states and 945 transitions. [2020-12-22 08:44:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:44,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:44:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:44,974 INFO L225 Difference]: With dead ends: 608 [2020-12-22 08:44:44,975 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 08:44:44,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 08:44:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2020-12-22 08:44:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-12-22 08:44:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 619 transitions. [2020-12-22 08:44:45,039 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 619 transitions. Word has length 61 [2020-12-22 08:44:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:45,039 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 619 transitions. [2020-12-22 08:44:45,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 619 transitions. [2020-12-22 08:44:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:44:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:45,044 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:45,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:44:45,044 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1997598018, now seen corresponding path program 1 times [2020-12-22 08:44:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:45,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494258308] [2020-12-22 08:44:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:45,146 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 08:44:45,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494258308] [2020-12-22 08:44:45,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:45,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453682964] [2020-12-22 08:44:45,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:45,150 INFO L87 Difference]: Start difference. First operand 404 states and 619 transitions. Second operand 3 states. [2020-12-22 08:44:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:45,204 INFO L93 Difference]: Finished difference Result 1080 states and 1685 transitions. [2020-12-22 08:44:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:45,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:44:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:45,210 INFO L225 Difference]: With dead ends: 1080 [2020-12-22 08:44:45,210 INFO L226 Difference]: Without dead ends: 710 [2020-12-22 08:44:45,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-12-22 08:44:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 708. [2020-12-22 08:44:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-12-22 08:44:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1091 transitions. [2020-12-22 08:44:45,258 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1091 transitions. Word has length 62 [2020-12-22 08:44:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:45,259 INFO L481 AbstractCegarLoop]: Abstraction has 708 states and 1091 transitions. [2020-12-22 08:44:45,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1091 transitions. [2020-12-22 08:44:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:44:45,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:45,261 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:45,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:44:45,261 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:45,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1910647641, now seen corresponding path program 1 times [2020-12-22 08:44:45,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:45,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248420030] [2020-12-22 08:44:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:45,368 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 08:44:45,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248420030] [2020-12-22 08:44:45,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:45,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:45,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623072362] [2020-12-22 08:44:45,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:45,371 INFO L87 Difference]: Start difference. First operand 708 states and 1091 transitions. Second operand 3 states. [2020-12-22 08:44:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:45,456 INFO L93 Difference]: Finished difference Result 1928 states and 2997 transitions. [2020-12-22 08:44:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:45,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:44:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:45,465 INFO L225 Difference]: With dead ends: 1928 [2020-12-22 08:44:45,466 INFO L226 Difference]: Without dead ends: 1254 [2020-12-22 08:44:45,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-12-22 08:44:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1252. [2020-12-22 08:44:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1252 states. [2020-12-22 08:44:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1923 transitions. [2020-12-22 08:44:45,599 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1923 transitions. Word has length 63 [2020-12-22 08:44:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:45,599 INFO L481 AbstractCegarLoop]: Abstraction has 1252 states and 1923 transitions. [2020-12-22 08:44:45,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1923 transitions. [2020-12-22 08:44:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:44:45,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:45,603 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:45,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:44:45,603 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2007440880, now seen corresponding path program 1 times [2020-12-22 08:44:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:45,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146205649] [2020-12-22 08:44:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:45,788 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 08:44:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146205649] [2020-12-22 08:44:45,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:45,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:44:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123230008] [2020-12-22 08:44:45,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:45,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:45,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:45,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:45,793 INFO L87 Difference]: Start difference. First operand 1252 states and 1923 transitions. Second operand 6 states. [2020-12-22 08:44:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:46,139 INFO L93 Difference]: Finished difference Result 3672 states and 5669 transitions. [2020-12-22 08:44:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:46,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:44:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:46,154 INFO L225 Difference]: With dead ends: 3672 [2020-12-22 08:44:46,154 INFO L226 Difference]: Without dead ends: 2454 [2020-12-22 08:44:46,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2020-12-22 08:44:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2452. [2020-12-22 08:44:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-12-22 08:44:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3763 transitions. [2020-12-22 08:44:46,378 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3763 transitions. Word has length 64 [2020-12-22 08:44:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:46,378 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3763 transitions. [2020-12-22 08:44:46,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3763 transitions. [2020-12-22 08:44:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:44:46,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:46,380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:46,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:44:46,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash -960141227, now seen corresponding path program 1 times [2020-12-22 08:44:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:46,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946855368] [2020-12-22 08:44:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:46,502 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 08:44:46,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946855368] [2020-12-22 08:44:46,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:46,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:44:46,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122396478] [2020-12-22 08:44:46,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:44:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:44:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:44:46,508 INFO L87 Difference]: Start difference. First operand 2452 states and 3763 transitions. Second operand 6 states. [2020-12-22 08:44:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:47,116 INFO L93 Difference]: Finished difference Result 7256 states and 11157 transitions. [2020-12-22 08:44:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:47,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:44:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:47,144 INFO L225 Difference]: With dead ends: 7256 [2020-12-22 08:44:47,145 INFO L226 Difference]: Without dead ends: 4838 [2020-12-22 08:44:47,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:44:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2020-12-22 08:44:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4836. [2020-12-22 08:44:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4836 states. [2020-12-22 08:44:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4836 states to 4836 states and 7395 transitions. [2020-12-22 08:44:47,598 INFO L78 Accepts]: Start accepts. Automaton has 4836 states and 7395 transitions. Word has length 64 [2020-12-22 08:44:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:47,599 INFO L481 AbstractCegarLoop]: Abstraction has 4836 states and 7395 transitions. [2020-12-22 08:44:47,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:44:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4836 states and 7395 transitions. [2020-12-22 08:44:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:44:47,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:47,602 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:47,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:44:47,602 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash 313726778, now seen corresponding path program 1 times [2020-12-22 08:44:47,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:47,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275337185] [2020-12-22 08:44:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:47,674 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 08:44:47,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275337185] [2020-12-22 08:44:47,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:47,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:44:47,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959628167] [2020-12-22 08:44:47,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:44:47,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:47,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:44:47,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:44:47,677 INFO L87 Difference]: Start difference. First operand 4836 states and 7395 transitions. Second operand 5 states. [2020-12-22 08:44:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:48,154 INFO L93 Difference]: Finished difference Result 9638 states and 14756 transitions. [2020-12-22 08:44:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:44:48,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 08:44:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:48,181 INFO L225 Difference]: With dead ends: 9638 [2020-12-22 08:44:48,181 INFO L226 Difference]: Without dead ends: 4836 [2020-12-22 08:44:48,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2020-12-22 08:44:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4836. [2020-12-22 08:44:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4836 states. [2020-12-22 08:44:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4836 states to 4836 states and 7331 transitions. [2020-12-22 08:44:48,622 INFO L78 Accepts]: Start accepts. Automaton has 4836 states and 7331 transitions. Word has length 64 [2020-12-22 08:44:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:48,622 INFO L481 AbstractCegarLoop]: Abstraction has 4836 states and 7331 transitions. [2020-12-22 08:44:48,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:44:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4836 states and 7331 transitions. [2020-12-22 08:44:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:44:48,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:48,623 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:48,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:44:48,624 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1133302817, now seen corresponding path program 1 times [2020-12-22 08:44:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:48,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401353495] [2020-12-22 08:44:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:48,723 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 08:44:48,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401353495] [2020-12-22 08:44:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:44:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735074316] [2020-12-22 08:44:48,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:44:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:48,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:44:48,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:48,727 INFO L87 Difference]: Start difference. First operand 4836 states and 7331 transitions. Second operand 7 states. [2020-12-22 08:44:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:52,940 INFO L93 Difference]: Finished difference Result 52856 states and 80301 transitions. [2020-12-22 08:44:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:44:52,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 08:44:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:53,241 INFO L225 Difference]: With dead ends: 52856 [2020-12-22 08:44:53,242 INFO L226 Difference]: Without dead ends: 48054 [2020-12-22 08:44:53,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:44:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48054 states. [2020-12-22 08:44:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48054 to 9636. [2020-12-22 08:44:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9636 states. [2020-12-22 08:44:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9636 states to 9636 states and 14371 transitions. [2020-12-22 08:44:54,989 INFO L78 Accepts]: Start accepts. Automaton has 9636 states and 14371 transitions. Word has length 64 [2020-12-22 08:44:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:54,989 INFO L481 AbstractCegarLoop]: Abstraction has 9636 states and 14371 transitions. [2020-12-22 08:44:54,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:44:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9636 states and 14371 transitions. [2020-12-22 08:44:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:44:54,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:54,991 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:54,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:44:54,992 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:54,992 INFO L82 PathProgramCache]: Analyzing trace with hash 916867770, now seen corresponding path program 1 times [2020-12-22 08:44:54,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:54,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194314676] [2020-12-22 08:44:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:55,338 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 08:44:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194314676] [2020-12-22 08:44:55,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:55,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:44:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779844189] [2020-12-22 08:44:55,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:44:55,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:44:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:44:55,342 INFO L87 Difference]: Start difference. First operand 9636 states and 14371 transitions. Second operand 7 states. [2020-12-22 08:44:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:56,551 INFO L93 Difference]: Finished difference Result 19240 states and 28709 transitions. [2020-12-22 08:44:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:44:56,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 08:44:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:56,580 INFO L225 Difference]: With dead ends: 19240 [2020-12-22 08:44:56,580 INFO L226 Difference]: Without dead ends: 9638 [2020-12-22 08:44:56,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:44:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2020-12-22 08:44:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 9636. [2020-12-22 08:44:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9636 states. [2020-12-22 08:44:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9636 states to 9636 states and 14243 transitions. [2020-12-22 08:44:57,557 INFO L78 Accepts]: Start accepts. Automaton has 9636 states and 14243 transitions. Word has length 66 [2020-12-22 08:44:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:57,558 INFO L481 AbstractCegarLoop]: Abstraction has 9636 states and 14243 transitions. [2020-12-22 08:44:57,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:44:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 9636 states and 14243 transitions. [2020-12-22 08:44:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:44:57,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:57,559 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:57,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:44:57,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash 895865115, now seen corresponding path program 1 times [2020-12-22 08:44:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:57,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138337423] [2020-12-22 08:44:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:57,630 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 08:44:57,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138337423] [2020-12-22 08:44:57,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:57,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:44:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8480042] [2020-12-22 08:44:57,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:44:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:44:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:57,634 INFO L87 Difference]: Start difference. First operand 9636 states and 14243 transitions. Second operand 3 states. [2020-12-22 08:44:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:58,635 INFO L93 Difference]: Finished difference Result 21562 states and 31831 transitions. [2020-12-22 08:44:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:44:58,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:44:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:58,675 INFO L225 Difference]: With dead ends: 21562 [2020-12-22 08:44:58,675 INFO L226 Difference]: Without dead ends: 11960 [2020-12-22 08:44:58,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:44:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11960 states. [2020-12-22 08:44:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11960 to 11958. [2020-12-22 08:44:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11958 states. [2020-12-22 08:44:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 17525 transitions. [2020-12-22 08:44:59,758 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 17525 transitions. Word has length 66 [2020-12-22 08:44:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:59,759 INFO L481 AbstractCegarLoop]: Abstraction has 11958 states and 17525 transitions. [2020-12-22 08:44:59,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:44:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 17525 transitions. [2020-12-22 08:44:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:44:59,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:59,760 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:59,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:44:59,761 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1643779557, now seen corresponding path program 1 times [2020-12-22 08:44:59,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:59,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804114378] [2020-12-22 08:44:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:59,856 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 08:44:59,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804114378] [2020-12-22 08:44:59,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:59,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:44:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536621967] [2020-12-22 08:44:59,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:44:59,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:59,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:44:59,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:44:59,859 INFO L87 Difference]: Start difference. First operand 11958 states and 17525 transitions. Second operand 5 states. [2020-12-22 08:45:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:01,464 INFO L93 Difference]: Finished difference Result 22749 states and 33172 transitions. [2020-12-22 08:45:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:45:01,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:45:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:01,515 INFO L225 Difference]: With dead ends: 22749 [2020-12-22 08:45:01,516 INFO L226 Difference]: Without dead ends: 22747 [2020-12-22 08:45:01,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:45:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2020-12-22 08:45:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 12470. [2020-12-22 08:45:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12470 states. [2020-12-22 08:45:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12470 states to 12470 states and 18005 transitions. [2020-12-22 08:45:02,989 INFO L78 Accepts]: Start accepts. Automaton has 12470 states and 18005 transitions. Word has length 67 [2020-12-22 08:45:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:02,990 INFO L481 AbstractCegarLoop]: Abstraction has 12470 states and 18005 transitions. [2020-12-22 08:45:02,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:45:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 12470 states and 18005 transitions. [2020-12-22 08:45:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:45:02,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:02,996 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:02,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:45:02,997 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2083961666, now seen corresponding path program 1 times [2020-12-22 08:45:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:02,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716943502] [2020-12-22 08:45:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:45:03,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716943502] [2020-12-22 08:45:03,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:03,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:45:03,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133852097] [2020-12-22 08:45:03,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:45:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:45:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:45:03,130 INFO L87 Difference]: Start difference. First operand 12470 states and 18005 transitions. Second operand 7 states. [2020-12-22 08:45:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:08,689 INFO L93 Difference]: Finished difference Result 78554 states and 113363 transitions. [2020-12-22 08:45:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:45:08,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 08:45:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:08,838 INFO L225 Difference]: With dead ends: 78554 [2020-12-22 08:45:08,839 INFO L226 Difference]: Without dead ends: 66120 [2020-12-22 08:45:08,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:45:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66120 states. [2020-12-22 08:45:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66120 to 24902. [2020-12-22 08:45:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24902 states. [2020-12-22 08:45:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 35813 transitions. [2020-12-22 08:45:12,229 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 35813 transitions. Word has length 93 [2020-12-22 08:45:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:12,229 INFO L481 AbstractCegarLoop]: Abstraction has 24902 states and 35813 transitions. [2020-12-22 08:45:12,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:45:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 35813 transitions. [2020-12-22 08:45:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:45:12,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:12,237 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:12,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:45:12,238 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:12,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1513365710, now seen corresponding path program 1 times [2020-12-22 08:45:12,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:12,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363206519] [2020-12-22 08:45:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:45:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363206519] [2020-12-22 08:45:12,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:12,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:45:12,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115560187] [2020-12-22 08:45:12,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:45:12,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:45:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:45:12,424 INFO L87 Difference]: Start difference. First operand 24902 states and 35813 transitions. Second operand 7 states. [2020-12-22 08:45:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:19,993 INFO L93 Difference]: Finished difference Result 90986 states and 131171 transitions. [2020-12-22 08:45:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:45:19,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 08:45:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:20,143 INFO L225 Difference]: With dead ends: 90986 [2020-12-22 08:45:20,143 INFO L226 Difference]: Without dead ends: 78552 [2020-12-22 08:45:20,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:45:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78552 states. [2020-12-22 08:45:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78552 to 43566. [2020-12-22 08:45:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43566 states. [2020-12-22 08:45:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43566 states to 43566 states and 62381 transitions. [2020-12-22 08:45:25,217 INFO L78 Accepts]: Start accepts. Automaton has 43566 states and 62381 transitions. Word has length 93 [2020-12-22 08:45:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:25,217 INFO L481 AbstractCegarLoop]: Abstraction has 43566 states and 62381 transitions. [2020-12-22 08:45:25,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:45:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 43566 states and 62381 transitions. [2020-12-22 08:45:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:45:25,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:25,222 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:25,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:45:25,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:25,223 INFO L82 PathProgramCache]: Analyzing trace with hash 359419604, now seen corresponding path program 1 times [2020-12-22 08:45:25,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:25,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838267414] [2020-12-22 08:45:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 08:45:25,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838267414] [2020-12-22 08:45:25,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:25,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:45:25,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4303911] [2020-12-22 08:45:25,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:45:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:45:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:45:25,363 INFO L87 Difference]: Start difference. First operand 43566 states and 62381 transitions. Second operand 7 states. [2020-12-22 08:45:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:34,641 INFO L93 Difference]: Finished difference Result 103418 states and 148979 transitions. [2020-12-22 08:45:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:45:34,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 08:45:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:34,873 INFO L225 Difference]: With dead ends: 103418 [2020-12-22 08:45:34,874 INFO L226 Difference]: Without dead ends: 90984 [2020-12-22 08:45:34,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:45:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90984 states. [2020-12-22 08:45:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90984 to 55998. [2020-12-22 08:45:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55998 states. [2020-12-22 08:45:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55998 states to 55998 states and 80189 transitions. [2020-12-22 08:45:41,524 INFO L78 Accepts]: Start accepts. Automaton has 55998 states and 80189 transitions. Word has length 93 [2020-12-22 08:45:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:41,524 INFO L481 AbstractCegarLoop]: Abstraction has 55998 states and 80189 transitions. [2020-12-22 08:45:41,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:45:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 55998 states and 80189 transitions. [2020-12-22 08:45:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:45:41,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:41,532 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:41,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:45:41,532 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 655465032, now seen corresponding path program 1 times [2020-12-22 08:45:41,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:41,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352845003] [2020-12-22 08:45:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:45:41,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352845003] [2020-12-22 08:45:41,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:41,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:45:41,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046721558] [2020-12-22 08:45:41,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:45:41,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:45:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:45:41,672 INFO L87 Difference]: Start difference. First operand 55998 states and 80189 transitions. Second operand 7 states. [2020-12-22 08:45:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:52,875 INFO L93 Difference]: Finished difference Result 115850 states and 166787 transitions. [2020-12-22 08:45:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:45:52,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 08:45:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:53,080 INFO L225 Difference]: With dead ends: 115850 [2020-12-22 08:45:53,080 INFO L226 Difference]: Without dead ends: 103416 [2020-12-22 08:45:53,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:45:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103416 states. [2020-12-22 08:46:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103416 to 68430. [2020-12-22 08:46:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68430 states. [2020-12-22 08:46:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68430 states to 68430 states and 97997 transitions. [2020-12-22 08:46:00,966 INFO L78 Accepts]: Start accepts. Automaton has 68430 states and 97997 transitions. Word has length 93 [2020-12-22 08:46:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:00,966 INFO L481 AbstractCegarLoop]: Abstraction has 68430 states and 97997 transitions. [2020-12-22 08:46:00,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:46:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 68430 states and 97997 transitions. [2020-12-22 08:46:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:46:00,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:00,975 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:00,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:46:00,975 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash -235568196, now seen corresponding path program 1 times [2020-12-22 08:46:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:00,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099094229] [2020-12-22 08:46:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:46:01,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099094229] [2020-12-22 08:46:01,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:01,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:46:01,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463330380] [2020-12-22 08:46:01,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:46:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:46:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:46:01,108 INFO L87 Difference]: Start difference. First operand 68430 states and 97997 transitions. Second operand 7 states. [2020-12-22 08:46:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:13,719 INFO L93 Difference]: Finished difference Result 123642 states and 178099 transitions. [2020-12-22 08:46:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:46:13,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 08:46:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:13,909 INFO L225 Difference]: With dead ends: 123642 [2020-12-22 08:46:13,909 INFO L226 Difference]: Without dead ends: 113528 [2020-12-22 08:46:13,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:46:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113528 states. [2020-12-22 08:46:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113528 to 78542. [2020-12-22 08:46:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78542 states. [2020-12-22 08:46:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78542 states to 78542 states and 112589 transitions. [2020-12-22 08:46:23,199 INFO L78 Accepts]: Start accepts. Automaton has 78542 states and 112589 transitions. Word has length 93 [2020-12-22 08:46:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:23,200 INFO L481 AbstractCegarLoop]: Abstraction has 78542 states and 112589 transitions. [2020-12-22 08:46:23,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:46:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 78542 states and 112589 transitions. [2020-12-22 08:46:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:46:23,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:23,209 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:23,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:46:23,209 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2095026606, now seen corresponding path program 1 times [2020-12-22 08:46:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:23,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461116911] [2020-12-22 08:46:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:23,583 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 08:46:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:46:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461116911] [2020-12-22 08:46:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981589128] [2020-12-22 08:46:23,666 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 08:46:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 08:46:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:46:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:46:24,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:46:24,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2020-12-22 08:46:24,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402876911] [2020-12-22 08:46:24,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:46:24,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:46:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:46:24,267 INFO L87 Difference]: Start difference. First operand 78542 states and 112589 transitions. Second operand 13 states. [2020-12-22 08:47:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:26,002 INFO L93 Difference]: Finished difference Result 506291 states and 721237 transitions. [2020-12-22 08:47:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 08:47:26,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2020-12-22 08:47:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:27,458 INFO L225 Difference]: With dead ends: 506291 [2020-12-22 08:47:27,459 INFO L226 Difference]: Without dead ends: 440561 [2020-12-22 08:47:27,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1282, Invalid=6908, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 08:47:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440561 states. [2020-12-22 08:47:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440561 to 203742. [2020-12-22 08:47:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203742 states. [2020-12-22 08:47:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203742 states to 203742 states and 287421 transitions. [2020-12-22 08:47:59,965 INFO L78 Accepts]: Start accepts. Automaton has 203742 states and 287421 transitions. Word has length 94 [2020-12-22 08:47:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:59,965 INFO L481 AbstractCegarLoop]: Abstraction has 203742 states and 287421 transitions. [2020-12-22 08:47:59,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:47:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 203742 states and 287421 transitions. [2020-12-22 08:48:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:48:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:48:00,012 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:48:00,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 08:48:00,213 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:48:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:48:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash -11558342, now seen corresponding path program 1 times [2020-12-22 08:48:00,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:48:00,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200577980] [2020-12-22 08:48:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:48:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:48:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:48:00,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200577980] [2020-12-22 08:48:00,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887633470] [2020-12-22 08:48:00,484 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 08:48:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:48:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 08:48:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:48:00,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:48:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:48:01,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:48:01,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 08:48:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444692042] [2020-12-22 08:48:01,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:48:01,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:48:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:48:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:48:01,271 INFO L87 Difference]: Start difference. First operand 203742 states and 287421 transitions. Second operand 17 states.