/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_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:06:19,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:06:19,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:06:19,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:06:19,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:06:19,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:06:19,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:06:19,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:06:19,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:06:19,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:06:19,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:06:19,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:06:19,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:06:19,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:06:19,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:06:19,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:06:19,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:06:19,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:06:19,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:06:19,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:06:19,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:06:19,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:06:19,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:06:19,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:06:19,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:06:19,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:06:19,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:06:19,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:06:19,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:06:19,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:06:19,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:06:19,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:06:19,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:06:19,237 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:06:19,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:06:19,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:06:19,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:06:19,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:06:19,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:06:19,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:06:19,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:06:19,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:06:19,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:06:19,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:06:19,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:06:19,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:06:19,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:19,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:06:19,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:06:19,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:06:19,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:06:19,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:06:19,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:06:19,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:06:19,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:06:19,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:06:19,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:06:19,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:06:19,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:06:19,716 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:06:19,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:06:19,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207215a59/84891573cdf34c47a2804422fb96171d/FLAGd8d227d73 [2020-12-22 08:06:20,498 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:06:20,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:06:20,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207215a59/84891573cdf34c47a2804422fb96171d/FLAGd8d227d73 [2020-12-22 08:06:20,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207215a59/84891573cdf34c47a2804422fb96171d [2020-12-22 08:06:20,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:06:20,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:06:20,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:20,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:06:20,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:06:20,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:20" (1/1) ... [2020-12-22 08:06:20,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df52692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:20, skipping insertion in model container [2020-12-22 08:06:20,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:20" (1/1) ... [2020-12-22 08:06:20,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:06:20,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:06:21,233 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_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14115,14128] [2020-12-22 08:06:21,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:21,329 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:06:21,478 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_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14115,14128] [2020-12-22 08:06:21,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:21,553 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:06:21,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21 WrapperNode [2020-12-22 08:06:21,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:21,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:21,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:06:21,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:06:21,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:21,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:06:21,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:06:21,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:06:21,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (1/1) ... [2020-12-22 08:06:21,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:06:21,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:06:21,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:06:21,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:06:21,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (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 08:06:21,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:06:21,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:06:21,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:06:21,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:06:23,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:06:23,356 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:06:23,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:23 BoogieIcfgContainer [2020-12-22 08:06:23,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:06:23,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:06:23,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:06:23,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:06:23,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:06:20" (1/3) ... [2020-12-22 08:06:23,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c20c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:23, skipping insertion in model container [2020-12-22 08:06:23,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:21" (2/3) ... [2020-12-22 08:06:23,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c20c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:23, skipping insertion in model container [2020-12-22 08:06:23,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:23" (3/3) ... [2020-12-22 08:06:23,375 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 08:06:23,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:06:23,392 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:06:23,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:06:23,464 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:06:23,464 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:06:23,464 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:06:23,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:06:23,465 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:06:23,465 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:06:23,465 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:06:23,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:06:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states. [2020-12-22 08:06:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:06:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:23,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:23,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 574427721, now seen corresponding path program 1 times [2020-12-22 08:06:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:23,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414893452] [2020-12-22 08:06:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:24,245 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 08:06:24,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414893452] [2020-12-22 08:06:24,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:24,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366541740] [2020-12-22 08:06:24,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:24,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:24,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:24,279 INFO L87 Difference]: Start difference. First operand 305 states. Second operand 3 states. [2020-12-22 08:06:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:24,543 INFO L93 Difference]: Finished difference Result 612 states and 1078 transitions. [2020-12-22 08:06:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:24,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2020-12-22 08:06:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:24,591 INFO L225 Difference]: With dead ends: 612 [2020-12-22 08:06:24,591 INFO L226 Difference]: Without dead ends: 495 [2020-12-22 08:06:24,596 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 08:06:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-12-22 08:06:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2020-12-22 08:06:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-12-22 08:06:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 736 transitions. [2020-12-22 08:06:24,715 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 736 transitions. Word has length 144 [2020-12-22 08:06:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:24,716 INFO L481 AbstractCegarLoop]: Abstraction has 493 states and 736 transitions. [2020-12-22 08:06:24,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 736 transitions. [2020-12-22 08:06:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:06:24,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:24,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:24,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:06:24,721 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 505056235, now seen corresponding path program 1 times [2020-12-22 08:06:24,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:24,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982928212] [2020-12-22 08:06:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:24,948 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 08:06:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982928212] [2020-12-22 08:06:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815911629] [2020-12-22 08:06:24,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:24,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:24,952 INFO L87 Difference]: Start difference. First operand 493 states and 736 transitions. Second operand 3 states. [2020-12-22 08:06:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:25,106 INFO L93 Difference]: Finished difference Result 1063 states and 1633 transitions. [2020-12-22 08:06:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:25,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2020-12-22 08:06:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:25,113 INFO L225 Difference]: With dead ends: 1063 [2020-12-22 08:06:25,113 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 08:06:25,116 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 08:06:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 08:06:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 08:06:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 08:06:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1300 transitions. [2020-12-22 08:06:25,156 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1300 transitions. Word has length 144 [2020-12-22 08:06:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:25,157 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1300 transitions. [2020-12-22 08:06:25,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1300 transitions. [2020-12-22 08:06:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 08:06:25,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:25,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:25,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:06:25,162 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 459957428, now seen corresponding path program 1 times [2020-12-22 08:06:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:25,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261543960] [2020-12-22 08:06:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:25,562 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 08:06:25,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261543960] [2020-12-22 08:06:25,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:25,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:25,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131948655] [2020-12-22 08:06:25,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:25,566 INFO L87 Difference]: Start difference. First operand 863 states and 1300 transitions. Second operand 4 states. [2020-12-22 08:06:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:25,736 INFO L93 Difference]: Finished difference Result 2524 states and 3793 transitions. [2020-12-22 08:06:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:25,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-12-22 08:06:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:25,748 INFO L225 Difference]: With dead ends: 2524 [2020-12-22 08:06:25,749 INFO L226 Difference]: Without dead ends: 1670 [2020-12-22 08:06:25,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2020-12-22 08:06:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1668. [2020-12-22 08:06:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1668 states. [2020-12-22 08:06:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2486 transitions. [2020-12-22 08:06:25,884 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2486 transitions. Word has length 144 [2020-12-22 08:06:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:25,892 INFO L481 AbstractCegarLoop]: Abstraction has 1668 states and 2486 transitions. [2020-12-22 08:06:25,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2486 transitions. [2020-12-22 08:06:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 08:06:25,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:25,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:25,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:06:25,901 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1789583768, now seen corresponding path program 1 times [2020-12-22 08:06:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:25,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255506011] [2020-12-22 08:06:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:26,009 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 08:06:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255506011] [2020-12-22 08:06:26,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:26,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193870248] [2020-12-22 08:06:26,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:26,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:26,012 INFO L87 Difference]: Start difference. First operand 1668 states and 2486 transitions. Second operand 3 states. [2020-12-22 08:06:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:26,172 INFO L93 Difference]: Finished difference Result 4966 states and 7396 transitions. [2020-12-22 08:06:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:26,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2020-12-22 08:06:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:26,192 INFO L225 Difference]: With dead ends: 4966 [2020-12-22 08:06:26,192 INFO L226 Difference]: Without dead ends: 3326 [2020-12-22 08:06:26,196 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 08:06:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2020-12-22 08:06:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 1670. [2020-12-22 08:06:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2020-12-22 08:06:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2488 transitions. [2020-12-22 08:06:26,360 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2488 transitions. Word has length 145 [2020-12-22 08:06:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:26,361 INFO L481 AbstractCegarLoop]: Abstraction has 1670 states and 2488 transitions. [2020-12-22 08:06:26,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2488 transitions. [2020-12-22 08:06:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:06:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:26,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:26,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:06:26,366 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:26,367 INFO L82 PathProgramCache]: Analyzing trace with hash 338353525, now seen corresponding path program 1 times [2020-12-22 08:06:26,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:26,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380600803] [2020-12-22 08:06:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:26,648 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 08:06:26,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380600803] [2020-12-22 08:06:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:26,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674282553] [2020-12-22 08:06:26,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:26,653 INFO L87 Difference]: Start difference. First operand 1670 states and 2488 transitions. Second operand 4 states. [2020-12-22 08:06:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:26,975 INFO L93 Difference]: Finished difference Result 4862 states and 7224 transitions. [2020-12-22 08:06:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:26,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 08:06:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:26,992 INFO L225 Difference]: With dead ends: 4862 [2020-12-22 08:06:26,992 INFO L226 Difference]: Without dead ends: 3222 [2020-12-22 08:06:26,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2020-12-22 08:06:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3220. [2020-12-22 08:06:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2020-12-22 08:06:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 4744 transitions. [2020-12-22 08:06:27,240 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 4744 transitions. Word has length 146 [2020-12-22 08:06:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:27,241 INFO L481 AbstractCegarLoop]: Abstraction has 3220 states and 4744 transitions. [2020-12-22 08:06:27,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 4744 transitions. [2020-12-22 08:06:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:06:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:27,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:27,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:06:27,248 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:27,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1154912631, now seen corresponding path program 1 times [2020-12-22 08:06:27,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:27,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326900511] [2020-12-22 08:06:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:27,332 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 08:06:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326900511] [2020-12-22 08:06:27,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:27,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:27,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762415792] [2020-12-22 08:06:27,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:27,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:27,336 INFO L87 Difference]: Start difference. First operand 3220 states and 4744 transitions. Second operand 3 states. [2020-12-22 08:06:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:27,732 INFO L93 Difference]: Finished difference Result 9584 states and 14112 transitions. [2020-12-22 08:06:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:27,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 08:06:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:27,767 INFO L225 Difference]: With dead ends: 9584 [2020-12-22 08:06:27,768 INFO L226 Difference]: Without dead ends: 6408 [2020-12-22 08:06:27,774 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 08:06:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2020-12-22 08:06:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 3224. [2020-12-22 08:06:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3224 states. [2020-12-22 08:06:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4748 transitions. [2020-12-22 08:06:28,079 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4748 transitions. Word has length 147 [2020-12-22 08:06:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:28,079 INFO L481 AbstractCegarLoop]: Abstraction has 3224 states and 4748 transitions. [2020-12-22 08:06:28,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4748 transitions. [2020-12-22 08:06:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:06:28,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:28,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:28,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:06:28,086 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2056376896, now seen corresponding path program 1 times [2020-12-22 08:06:28,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:28,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388803615] [2020-12-22 08:06:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:28,207 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 08:06:28,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388803615] [2020-12-22 08:06:28,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:28,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246421756] [2020-12-22 08:06:28,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:28,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:28,210 INFO L87 Difference]: Start difference. First operand 3224 states and 4748 transitions. Second operand 3 states. [2020-12-22 08:06:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:28,679 INFO L93 Difference]: Finished difference Result 8505 states and 12535 transitions. [2020-12-22 08:06:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:28,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 08:06:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:28,708 INFO L225 Difference]: With dead ends: 8505 [2020-12-22 08:06:28,708 INFO L226 Difference]: Without dead ends: 5589 [2020-12-22 08:06:28,714 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 08:06:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5589 states. [2020-12-22 08:06:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5589 to 5587. [2020-12-22 08:06:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-12-22 08:06:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 8109 transitions. [2020-12-22 08:06:29,170 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 8109 transitions. Word has length 148 [2020-12-22 08:06:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:29,171 INFO L481 AbstractCegarLoop]: Abstraction has 5587 states and 8109 transitions. [2020-12-22 08:06:29,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 8109 transitions. [2020-12-22 08:06:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:06:29,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:29,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:29,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:06:29,181 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1182249245, now seen corresponding path program 1 times [2020-12-22 08:06:29,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:29,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352207967] [2020-12-22 08:06:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:29,399 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 08:06:29,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352207967] [2020-12-22 08:06:29,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:29,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354658170] [2020-12-22 08:06:29,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:29,403 INFO L87 Difference]: Start difference. First operand 5587 states and 8109 transitions. Second operand 5 states. [2020-12-22 08:06:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:30,264 INFO L93 Difference]: Finished difference Result 16093 states and 23348 transitions. [2020-12-22 08:06:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:30,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-12-22 08:06:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:30,303 INFO L225 Difference]: With dead ends: 16093 [2020-12-22 08:06:30,303 INFO L226 Difference]: Without dead ends: 10543 [2020-12-22 08:06:30,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10543 states. [2020-12-22 08:06:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10543 to 10541. [2020-12-22 08:06:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10541 states. [2020-12-22 08:06:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 15140 transitions. [2020-12-22 08:06:31,117 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 15140 transitions. Word has length 148 [2020-12-22 08:06:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:31,118 INFO L481 AbstractCegarLoop]: Abstraction has 10541 states and 15140 transitions. [2020-12-22 08:06:31,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 15140 transitions. [2020-12-22 08:06:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:06:31,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:31,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:31,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:06:31,137 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1313778358, now seen corresponding path program 1 times [2020-12-22 08:06:31,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:31,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276814543] [2020-12-22 08:06:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:31,321 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 08:06:31,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276814543] [2020-12-22 08:06:31,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:31,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:31,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270420200] [2020-12-22 08:06:31,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:31,324 INFO L87 Difference]: Start difference. First operand 10541 states and 15140 transitions. Second operand 4 states. [2020-12-22 08:06:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:32,158 INFO L93 Difference]: Finished difference Result 21315 states and 30516 transitions. [2020-12-22 08:06:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:32,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-12-22 08:06:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:32,191 INFO L225 Difference]: With dead ends: 21315 [2020-12-22 08:06:32,191 INFO L226 Difference]: Without dead ends: 10891 [2020-12-22 08:06:32,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10891 states. [2020-12-22 08:06:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10891 to 10749. [2020-12-22 08:06:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10749 states. [2020-12-22 08:06:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10749 states to 10749 states and 15368 transitions. [2020-12-22 08:06:33,010 INFO L78 Accepts]: Start accepts. Automaton has 10749 states and 15368 transitions. Word has length 148 [2020-12-22 08:06:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:33,010 INFO L481 AbstractCegarLoop]: Abstraction has 10749 states and 15368 transitions. [2020-12-22 08:06:33,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10749 states and 15368 transitions. [2020-12-22 08:06:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:06:33,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:33,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:33,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:06:33,027 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:33,027 INFO L82 PathProgramCache]: Analyzing trace with hash -618796246, now seen corresponding path program 1 times [2020-12-22 08:06:33,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:33,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917324662] [2020-12-22 08:06:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:33,090 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 08:06:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917324662] [2020-12-22 08:06:33,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:33,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967450654] [2020-12-22 08:06:33,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:33,093 INFO L87 Difference]: Start difference. First operand 10749 states and 15368 transitions. Second operand 3 states. [2020-12-22 08:06:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:34,620 INFO L93 Difference]: Finished difference Result 31557 states and 45226 transitions. [2020-12-22 08:06:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:34,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 08:06:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:34,671 INFO L225 Difference]: With dead ends: 31557 [2020-12-22 08:06:34,672 INFO L226 Difference]: Without dead ends: 21373 [2020-12-22 08:06:34,693 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 08:06:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21373 states. [2020-12-22 08:06:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21373 to 10765. [2020-12-22 08:06:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10765 states. [2020-12-22 08:06:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10765 states to 10765 states and 15384 transitions. [2020-12-22 08:06:35,612 INFO L78 Accepts]: Start accepts. Automaton has 10765 states and 15384 transitions. Word has length 149 [2020-12-22 08:06:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:35,612 INFO L481 AbstractCegarLoop]: Abstraction has 10765 states and 15384 transitions. [2020-12-22 08:06:35,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10765 states and 15384 transitions. [2020-12-22 08:06:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:06:35,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:35,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:35,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:06:35,630 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash 696847479, now seen corresponding path program 1 times [2020-12-22 08:06:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:35,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590145680] [2020-12-22 08:06:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:35,787 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 08:06:35,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590145680] [2020-12-22 08:06:35,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:35,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:35,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544754861] [2020-12-22 08:06:35,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:35,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:35,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:35,790 INFO L87 Difference]: Start difference. First operand 10765 states and 15384 transitions. Second operand 4 states. [2020-12-22 08:06:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:36,568 INFO L93 Difference]: Finished difference Result 21520 states and 30754 transitions. [2020-12-22 08:06:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:36,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 08:06:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:36,593 INFO L225 Difference]: With dead ends: 21520 [2020-12-22 08:06:36,593 INFO L226 Difference]: Without dead ends: 10763 [2020-12-22 08:06:36,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10763 states. [2020-12-22 08:06:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10763 to 10763. [2020-12-22 08:06:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10763 states. [2020-12-22 08:06:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 15380 transitions. [2020-12-22 08:06:37,414 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 15380 transitions. Word has length 150 [2020-12-22 08:06:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:37,415 INFO L481 AbstractCegarLoop]: Abstraction has 10763 states and 15380 transitions. [2020-12-22 08:06:37,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 15380 transitions. [2020-12-22 08:06:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:06:37,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:37,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:37,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:06:37,429 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1219131811, now seen corresponding path program 1 times [2020-12-22 08:06:37,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:37,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846451370] [2020-12-22 08:06:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:37,537 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 08:06:37,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846451370] [2020-12-22 08:06:37,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:37,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975183012] [2020-12-22 08:06:37,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:37,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:37,540 INFO L87 Difference]: Start difference. First operand 10763 states and 15380 transitions. Second operand 3 states. [2020-12-22 08:06:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:38,733 INFO L93 Difference]: Finished difference Result 25628 states and 36743 transitions. [2020-12-22 08:06:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:38,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2020-12-22 08:06:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:38,769 INFO L225 Difference]: With dead ends: 25628 [2020-12-22 08:06:38,770 INFO L226 Difference]: Without dead ends: 15980 [2020-12-22 08:06:38,785 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 08:06:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15980 states. [2020-12-22 08:06:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15980 to 15978. [2020-12-22 08:06:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15978 states. [2020-12-22 08:06:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15978 states to 15978 states and 22453 transitions. [2020-12-22 08:06:39,906 INFO L78 Accepts]: Start accepts. Automaton has 15978 states and 22453 transitions. Word has length 150 [2020-12-22 08:06:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:39,907 INFO L481 AbstractCegarLoop]: Abstraction has 15978 states and 22453 transitions. [2020-12-22 08:06:39,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 15978 states and 22453 transitions. [2020-12-22 08:06:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:06:39,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:39,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:39,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:06:39,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:39,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:39,927 INFO L82 PathProgramCache]: Analyzing trace with hash 204880059, now seen corresponding path program 1 times [2020-12-22 08:06:39,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:39,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475886604] [2020-12-22 08:06:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:40,023 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 08:06:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475886604] [2020-12-22 08:06:40,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:40,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:40,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2949631] [2020-12-22 08:06:40,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:40,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:40,027 INFO L87 Difference]: Start difference. First operand 15978 states and 22453 transitions. Second operand 3 states. [2020-12-22 08:06:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:41,845 INFO L93 Difference]: Finished difference Result 42898 states and 61037 transitions. [2020-12-22 08:06:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:41,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 08:06:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:41,910 INFO L225 Difference]: With dead ends: 42898 [2020-12-22 08:06:41,910 INFO L226 Difference]: Without dead ends: 29628 [2020-12-22 08:06:41,932 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 08:06:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29628 states. [2020-12-22 08:06:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29628 to 29626. [2020-12-22 08:06:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29626 states. [2020-12-22 08:06:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29626 states to 29626 states and 41633 transitions. [2020-12-22 08:06:43,826 INFO L78 Accepts]: Start accepts. Automaton has 29626 states and 41633 transitions. Word has length 156 [2020-12-22 08:06:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:43,827 INFO L481 AbstractCegarLoop]: Abstraction has 29626 states and 41633 transitions. [2020-12-22 08:06:43,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 29626 states and 41633 transitions. [2020-12-22 08:06:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 08:06:43,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:43,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:43,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:06:43,862 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1634156586, now seen corresponding path program 1 times [2020-12-22 08:06:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:43,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273097765] [2020-12-22 08:06:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:44,063 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 08:06:44,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273097765] [2020-12-22 08:06:44,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:44,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781023337] [2020-12-22 08:06:44,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:44,066 INFO L87 Difference]: Start difference. First operand 29626 states and 41633 transitions. Second operand 4 states. [2020-12-22 08:06:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:47,104 INFO L93 Difference]: Finished difference Result 76767 states and 107981 transitions. [2020-12-22 08:06:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:47,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-12-22 08:06:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:47,194 INFO L225 Difference]: With dead ends: 76767 [2020-12-22 08:06:47,194 INFO L226 Difference]: Without dead ends: 47501 [2020-12-22 08:06:47,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47501 states. [2020-12-22 08:06:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47501 to 47499. [2020-12-22 08:06:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47499 states. [2020-12-22 08:06:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47499 states to 47499 states and 65936 transitions. [2020-12-22 08:06:50,330 INFO L78 Accepts]: Start accepts. Automaton has 47499 states and 65936 transitions. Word has length 156 [2020-12-22 08:06:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:50,330 INFO L481 AbstractCegarLoop]: Abstraction has 47499 states and 65936 transitions. [2020-12-22 08:06:50,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 47499 states and 65936 transitions. [2020-12-22 08:06:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:06:50,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:50,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:50,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:06:50,365 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash 926322572, now seen corresponding path program 1 times [2020-12-22 08:06:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:50,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60938189] [2020-12-22 08:06:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:50,671 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 08:06:50,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60938189] [2020-12-22 08:06:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:50,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420356372] [2020-12-22 08:06:50,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:50,675 INFO L87 Difference]: Start difference. First operand 47499 states and 65936 transitions. Second operand 4 states. [2020-12-22 08:06:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:53,115 INFO L93 Difference]: Finished difference Result 75789 states and 105192 transitions. [2020-12-22 08:06:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:53,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-12-22 08:06:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:53,158 INFO L225 Difference]: With dead ends: 75789 [2020-12-22 08:06:53,158 INFO L226 Difference]: Without dead ends: 38775 [2020-12-22 08:06:53,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38775 states. [2020-12-22 08:06:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38775 to 38775. [2020-12-22 08:06:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38775 states. [2020-12-22 08:06:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38775 states to 38775 states and 53621 transitions. [2020-12-22 08:06:55,856 INFO L78 Accepts]: Start accepts. Automaton has 38775 states and 53621 transitions. Word has length 158 [2020-12-22 08:06:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:55,856 INFO L481 AbstractCegarLoop]: Abstraction has 38775 states and 53621 transitions. [2020-12-22 08:06:55,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 38775 states and 53621 transitions. [2020-12-22 08:06:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:06:55,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:55,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:55,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:06:55,885 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1764073122, now seen corresponding path program 1 times [2020-12-22 08:06:55,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:55,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609029853] [2020-12-22 08:06:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:56,176 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 08:06:56,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609029853] [2020-12-22 08:06:56,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:56,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:06:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439068646] [2020-12-22 08:06:56,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:06:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:56,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:06:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:06:56,179 INFO L87 Difference]: Start difference. First operand 38775 states and 53621 transitions. Second operand 9 states. [2020-12-22 08:07:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:00,988 INFO L93 Difference]: Finished difference Result 90373 states and 128849 transitions. [2020-12-22 08:07:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:00,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2020-12-22 08:07:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:01,067 INFO L225 Difference]: With dead ends: 90373 [2020-12-22 08:07:01,067 INFO L226 Difference]: Without dead ends: 72739 [2020-12-22 08:07:01,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:07:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72739 states. [2020-12-22 08:07:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72739 to 72737. [2020-12-22 08:07:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72737 states. [2020-12-22 08:07:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72737 states to 72737 states and 100839 transitions. [2020-12-22 08:07:05,826 INFO L78 Accepts]: Start accepts. Automaton has 72737 states and 100839 transitions. Word has length 164 [2020-12-22 08:07:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:05,826 INFO L481 AbstractCegarLoop]: Abstraction has 72737 states and 100839 transitions. [2020-12-22 08:07:05,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:07:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 72737 states and 100839 transitions. [2020-12-22 08:07:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:07:05,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:05,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:05,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:07:05,882 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash 283259954, now seen corresponding path program 1 times [2020-12-22 08:07:05,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:05,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575842986] [2020-12-22 08:07:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:06,321 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 08:07:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575842986] [2020-12-22 08:07:06,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:06,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:07:06,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834644771] [2020-12-22 08:07:06,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:07:06,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:07:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:06,325 INFO L87 Difference]: Start difference. First operand 72737 states and 100839 transitions. Second operand 5 states. [2020-12-22 08:07:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:14,179 INFO L93 Difference]: Finished difference Result 127529 states and 187019 transitions. [2020-12-22 08:07:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:07:14,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-12-22 08:07:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:14,359 INFO L225 Difference]: With dead ends: 127529 [2020-12-22 08:07:14,359 INFO L226 Difference]: Without dead ends: 112743 [2020-12-22 08:07:14,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112743 states. [2020-12-22 08:07:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112743 to 83297. [2020-12-22 08:07:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83297 states. [2020-12-22 08:07:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83297 states to 83297 states and 117311 transitions. [2020-12-22 08:07:21,010 INFO L78 Accepts]: Start accepts. Automaton has 83297 states and 117311 transitions. Word has length 164 [2020-12-22 08:07:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:21,010 INFO L481 AbstractCegarLoop]: Abstraction has 83297 states and 117311 transitions. [2020-12-22 08:07:21,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:07:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 83297 states and 117311 transitions. [2020-12-22 08:07:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:07:21,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:21,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:21,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:07:21,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1114803063, now seen corresponding path program 1 times [2020-12-22 08:07:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:21,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716344505] [2020-12-22 08:07:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:21,493 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 08:07:21,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716344505] [2020-12-22 08:07:21,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:21,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:21,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299611416] [2020-12-22 08:07:21,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:21,501 INFO L87 Difference]: Start difference. First operand 83297 states and 117311 transitions. Second operand 4 states. [2020-12-22 08:07:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:27,357 INFO L93 Difference]: Finished difference Result 117305 states and 170165 transitions. [2020-12-22 08:07:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:27,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-12-22 08:07:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:27,463 INFO L225 Difference]: With dead ends: 117305 [2020-12-22 08:07:27,463 INFO L226 Difference]: Without dead ends: 83299 [2020-12-22 08:07:27,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83299 states. [2020-12-22 08:07:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83299 to 83297. [2020-12-22 08:07:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83297 states. [2020-12-22 08:07:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83297 states to 83297 states and 116703 transitions. [2020-12-22 08:07:34,122 INFO L78 Accepts]: Start accepts. Automaton has 83297 states and 116703 transitions. Word has length 164 [2020-12-22 08:07:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:34,122 INFO L481 AbstractCegarLoop]: Abstraction has 83297 states and 116703 transitions. [2020-12-22 08:07:34,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 83297 states and 116703 transitions. [2020-12-22 08:07:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 08:07:34,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:34,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:34,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:07:34,161 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 44269025, now seen corresponding path program 1 times [2020-12-22 08:07:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:34,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972327760] [2020-12-22 08:07:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:34,341 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 08:07:34,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972327760] [2020-12-22 08:07:34,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:34,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95740525] [2020-12-22 08:07:34,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:34,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:34,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:34,343 INFO L87 Difference]: Start difference. First operand 83297 states and 116703 transitions. Second operand 4 states. [2020-12-22 08:07:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:39,165 INFO L93 Difference]: Finished difference Result 146758 states and 205650 transitions. [2020-12-22 08:07:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:39,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-12-22 08:07:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:39,252 INFO L225 Difference]: With dead ends: 146758 [2020-12-22 08:07:39,252 INFO L226 Difference]: Without dead ends: 63531 [2020-12-22 08:07:39,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63531 states. [2020-12-22 08:07:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63531 to 63531. [2020-12-22 08:07:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63531 states. [2020-12-22 08:07:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63531 states to 63531 states and 89033 transitions. [2020-12-22 08:07:44,251 INFO L78 Accepts]: Start accepts. Automaton has 63531 states and 89033 transitions. Word has length 164 [2020-12-22 08:07:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:44,251 INFO L481 AbstractCegarLoop]: Abstraction has 63531 states and 89033 transitions. [2020-12-22 08:07:44,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 63531 states and 89033 transitions. [2020-12-22 08:07:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:07:44,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:44,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:44,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:07:44,284 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -296065430, now seen corresponding path program 1 times [2020-12-22 08:07:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:44,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797725188] [2020-12-22 08:07:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:44,409 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 08:07:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797725188] [2020-12-22 08:07:44,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:44,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535303663] [2020-12-22 08:07:44,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:44,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:44,411 INFO L87 Difference]: Start difference. First operand 63531 states and 89033 transitions. Second operand 3 states. [2020-12-22 08:07:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:50,906 INFO L93 Difference]: Finished difference Result 115310 states and 167786 transitions. [2020-12-22 08:07:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:50,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:07:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:51,006 INFO L225 Difference]: With dead ends: 115310 [2020-12-22 08:07:51,007 INFO L226 Difference]: Without dead ends: 84213 [2020-12-22 08:07:51,038 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 08:07:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84213 states. [2020-12-22 08:07:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84213 to 79512. [2020-12-22 08:07:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79512 states. [2020-12-22 08:07:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79512 states to 79512 states and 112028 transitions. [2020-12-22 08:07:57,908 INFO L78 Accepts]: Start accepts. Automaton has 79512 states and 112028 transitions. Word has length 172 [2020-12-22 08:07:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:57,909 INFO L481 AbstractCegarLoop]: Abstraction has 79512 states and 112028 transitions. [2020-12-22 08:07:57,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 79512 states and 112028 transitions. [2020-12-22 08:07:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:07:57,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:57,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:57,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:07:57,942 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2130569831, now seen corresponding path program 1 times [2020-12-22 08:07:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:57,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832829019] [2020-12-22 08:07:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:58,116 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 08:07:58,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832829019] [2020-12-22 08:07:58,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:58,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:07:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584067322] [2020-12-22 08:07:58,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:07:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:07:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:58,121 INFO L87 Difference]: Start difference. First operand 79512 states and 112028 transitions. Second operand 5 states. [2020-12-22 08:08:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:06,837 INFO L93 Difference]: Finished difference Result 129419 states and 188121 transitions. [2020-12-22 08:08:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:08:06,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-12-22 08:08:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:07,007 INFO L225 Difference]: With dead ends: 129419 [2020-12-22 08:08:07,007 INFO L226 Difference]: Without dead ends: 108723 [2020-12-22 08:08:07,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:08:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108723 states. [2020-12-22 08:08:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108723 to 82293. [2020-12-22 08:08:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82293 states. [2020-12-22 08:08:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82293 states to 82293 states and 116351 transitions. [2020-12-22 08:08:14,590 INFO L78 Accepts]: Start accepts. Automaton has 82293 states and 116351 transitions. Word has length 172 [2020-12-22 08:08:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 82293 states and 116351 transitions. [2020-12-22 08:08:14,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:08:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 82293 states and 116351 transitions. [2020-12-22 08:08:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:08:14,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:14,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:14,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:08:14,620 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -77091141, now seen corresponding path program 1 times [2020-12-22 08:08:14,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:14,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113813106] [2020-12-22 08:08:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:14,828 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 08:08:14,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113813106] [2020-12-22 08:08:14,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:14,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:08:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691814397] [2020-12-22 08:08:14,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:08:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:08:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:08:14,831 INFO L87 Difference]: Start difference. First operand 82293 states and 116351 transitions. Second operand 8 states. [2020-12-22 08:08:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:21,814 INFO L93 Difference]: Finished difference Result 133877 states and 194009 transitions. [2020-12-22 08:08:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:21,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2020-12-22 08:08:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:21,925 INFO L225 Difference]: With dead ends: 133877 [2020-12-22 08:08:21,926 INFO L226 Difference]: Without dead ends: 82295 [2020-12-22 08:08:21,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:08:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82295 states. [2020-12-22 08:08:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82295 to 79470. [2020-12-22 08:08:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79470 states. [2020-12-22 08:08:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79470 states to 79470 states and 111440 transitions. [2020-12-22 08:08:29,295 INFO L78 Accepts]: Start accepts. Automaton has 79470 states and 111440 transitions. Word has length 172 [2020-12-22 08:08:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:29,295 INFO L481 AbstractCegarLoop]: Abstraction has 79470 states and 111440 transitions. [2020-12-22 08:08:29,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:08:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 79470 states and 111440 transitions. [2020-12-22 08:08:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:08:29,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:29,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:29,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:08:29,325 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash 779270727, now seen corresponding path program 1 times [2020-12-22 08:08:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:29,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846764247] [2020-12-22 08:08:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:29,826 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 08:08:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846764247] [2020-12-22 08:08:29,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:29,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 08:08:29,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336323119] [2020-12-22 08:08:29,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 08:08:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 08:08:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:08:29,834 INFO L87 Difference]: Start difference. First operand 79470 states and 111440 transitions. Second operand 11 states. [2020-12-22 08:08:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:37,168 INFO L93 Difference]: Finished difference Result 157857 states and 221612 transitions. [2020-12-22 08:08:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:08:37,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2020-12-22 08:08:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:37,274 INFO L225 Difference]: With dead ends: 157857 [2020-12-22 08:08:37,275 INFO L226 Difference]: Without dead ends: 79470 [2020-12-22 08:08:37,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:08:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79470 states. [2020-12-22 08:08:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79470 to 79470. [2020-12-22 08:08:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79470 states. [2020-12-22 08:08:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79470 states to 79470 states and 109776 transitions. [2020-12-22 08:08:44,947 INFO L78 Accepts]: Start accepts. Automaton has 79470 states and 109776 transitions. Word has length 172 [2020-12-22 08:08:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:44,947 INFO L481 AbstractCegarLoop]: Abstraction has 79470 states and 109776 transitions. [2020-12-22 08:08:44,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 08:08:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 79470 states and 109776 transitions. [2020-12-22 08:08:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:08:44,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:44,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:08:44,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:08:44,978 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1437606036, now seen corresponding path program 1 times [2020-12-22 08:08:44,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:44,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881368072] [2020-12-22 08:08:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:45,290 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 08:08:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881368072] [2020-12-22 08:08:45,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:45,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:45,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525958737] [2020-12-22 08:08:45,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:45,296 INFO L87 Difference]: Start difference. First operand 79470 states and 109776 transitions. Second operand 4 states.