/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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:03:47,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:03:47,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:03:47,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:03:47,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:03:47,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:03:47,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:03:47,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:03:47,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:03:47,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:03:47,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:03:47,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:03:47,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:03:47,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:03:47,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:03:47,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:03:47,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:03:47,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:03:47,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:03:47,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:03:47,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:03:47,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:03:47,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:03:47,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:03:47,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:03:47,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:03:47,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:03:47,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:03:47,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:03:47,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:03:47,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:03:47,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:03:47,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:03:47,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:03:47,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:03:47,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:03:47,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:03:47,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:03:47,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:03:47,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:03:47,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:03:47,739 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:03:47,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:03:47,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:03:47,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:03:47,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:03:47,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:03:47,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:03:47,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:03:47,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:03:47,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:03:47,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:03:47,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:03:47,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:03:47,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:03:47,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:03:47,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:03:47,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:03:47,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:03:47,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:03:47,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:03:47,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:03:47,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:03:48,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:03:48,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:03:48,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:03:48,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:03:48,176 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:03:48,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:03:48,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6102ccdf0/34f463d7309c426db827080b9519342c/FLAGe8082b87b [2020-12-22 09:03:49,042 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:03:49,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:03:49,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6102ccdf0/34f463d7309c426db827080b9519342c/FLAGe8082b87b [2020-12-22 09:03:49,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6102ccdf0/34f463d7309c426db827080b9519342c [2020-12-22 09:03:49,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:03:49,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:03:49,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:49,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:03:49,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:03:49,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:49,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377f98bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49, skipping insertion in model container [2020-12-22 09:03:49,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:49,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:03:49,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:03:49,649 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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:03:49,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:49,707 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:03:49,808 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_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7402,7415] [2020-12-22 09:03:49,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:49,895 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:03:49,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49 WrapperNode [2020-12-22 09:03:49,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:49,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:49,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:03:49,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:03:49,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:49,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:50,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:03:50,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:03:50,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:03:50,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (1/1) ... [2020-12-22 09:03:50,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:03:50,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:03:50,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:03:50,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:03:50,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (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 09:03:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:03:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:03:50,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:03:50,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:03:51,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:03:51,107 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:03:51,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:51 BoogieIcfgContainer [2020-12-22 09:03:51,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:03:51,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:03:51,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:03:51,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:03:51,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:03:49" (1/3) ... [2020-12-22 09:03:51,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6a9a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:51, skipping insertion in model container [2020-12-22 09:03:51,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:49" (2/3) ... [2020-12-22 09:03:51,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6a9a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:51, skipping insertion in model container [2020-12-22 09:03:51,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:51" (3/3) ... [2020-12-22 09:03:51,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 09:03:51,135 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:03:51,142 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:03:51,165 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:03:51,219 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:03:51,219 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:03:51,219 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:03:51,219 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:03:51,219 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:03:51,220 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:03:51,220 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:03:51,220 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:03:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-12-22 09:03:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:03:51,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:51,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:51,266 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1468963440, now seen corresponding path program 1 times [2020-12-22 09:03:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:51,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914211602] [2020-12-22 09:03:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:51,813 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 09:03:51,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914211602] [2020-12-22 09:03:51,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:51,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:51,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216869131] [2020-12-22 09:03:51,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:51,871 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 3 states. [2020-12-22 09:03:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:51,980 INFO L93 Difference]: Finished difference Result 311 states and 527 transitions. [2020-12-22 09:03:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:51,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:03:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:52,000 INFO L225 Difference]: With dead ends: 311 [2020-12-22 09:03:52,000 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 09:03:52,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 09:03:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2020-12-22 09:03:52,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 09:03:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 329 transitions. [2020-12-22 09:03:52,072 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 329 transitions. Word has length 62 [2020-12-22 09:03:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:52,073 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 329 transitions. [2020-12-22 09:03:52,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 329 transitions. [2020-12-22 09:03:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:03:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:52,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:52,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:03:52,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -240910223, now seen corresponding path program 1 times [2020-12-22 09:03:52,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:52,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240063095] [2020-12-22 09:03:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:52,283 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 09:03:52,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240063095] [2020-12-22 09:03:52,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:52,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107193983] [2020-12-22 09:03:52,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,292 INFO L87 Difference]: Start difference. First operand 211 states and 329 transitions. Second operand 3 states. [2020-12-22 09:03:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:52,362 INFO L93 Difference]: Finished difference Result 503 states and 809 transitions. [2020-12-22 09:03:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:52,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:03:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:52,367 INFO L225 Difference]: With dead ends: 503 [2020-12-22 09:03:52,368 INFO L226 Difference]: Without dead ends: 349 [2020-12-22 09:03:52,371 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 09:03:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-22 09:03:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2020-12-22 09:03:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-22 09:03:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 552 transitions. [2020-12-22 09:03:52,436 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 552 transitions. Word has length 64 [2020-12-22 09:03:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:52,439 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 552 transitions. [2020-12-22 09:03:52,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 552 transitions. [2020-12-22 09:03:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:03:52,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:52,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:52,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:03:52,449 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1851209774, now seen corresponding path program 1 times [2020-12-22 09:03:52,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:52,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005381296] [2020-12-22 09:03:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:52,620 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 09:03:52,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005381296] [2020-12-22 09:03:52,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:52,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569012786] [2020-12-22 09:03:52,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:52,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,623 INFO L87 Difference]: Start difference. First operand 347 states and 552 transitions. Second operand 3 states. [2020-12-22 09:03:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:52,702 INFO L93 Difference]: Finished difference Result 895 states and 1450 transitions. [2020-12-22 09:03:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:52,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:03:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:52,712 INFO L225 Difference]: With dead ends: 895 [2020-12-22 09:03:52,712 INFO L226 Difference]: Without dead ends: 605 [2020-12-22 09:03:52,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-12-22 09:03:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 603. [2020-12-22 09:03:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-22 09:03:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 968 transitions. [2020-12-22 09:03:52,770 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 968 transitions. Word has length 66 [2020-12-22 09:03:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:52,771 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 968 transitions. [2020-12-22 09:03:52,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 968 transitions. [2020-12-22 09:03:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:03:52,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:52,775 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] [2020-12-22 09:03:52,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:03:52,775 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1666116403, now seen corresponding path program 1 times [2020-12-22 09:03:52,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:52,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406089848] [2020-12-22 09:03:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:52,909 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 09:03:52,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406089848] [2020-12-22 09:03:52,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:52,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:52,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378900400] [2020-12-22 09:03:52,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:52,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:52,912 INFO L87 Difference]: Start difference. First operand 603 states and 968 transitions. Second operand 5 states. [2020-12-22 09:03:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:53,204 INFO L93 Difference]: Finished difference Result 3079 states and 5038 transitions. [2020-12-22 09:03:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:03:53,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:03:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:53,220 INFO L225 Difference]: With dead ends: 3079 [2020-12-22 09:03:53,221 INFO L226 Difference]: Without dead ends: 2533 [2020-12-22 09:03:53,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:03:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2020-12-22 09:03:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1131. [2020-12-22 09:03:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-12-22 09:03:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1828 transitions. [2020-12-22 09:03:53,307 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1828 transitions. Word has length 68 [2020-12-22 09:03:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:53,308 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1828 transitions. [2020-12-22 09:03:53,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1828 transitions. [2020-12-22 09:03:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:03:53,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:53,310 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] [2020-12-22 09:03:53,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:03:53,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 47496755, now seen corresponding path program 1 times [2020-12-22 09:03:53,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:53,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542661748] [2020-12-22 09:03:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:53,414 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 09:03:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542661748] [2020-12-22 09:03:53,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:53,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871504273] [2020-12-22 09:03:53,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:53,417 INFO L87 Difference]: Start difference. First operand 1131 states and 1828 transitions. Second operand 4 states. [2020-12-22 09:03:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:53,666 INFO L93 Difference]: Finished difference Result 4121 states and 6711 transitions. [2020-12-22 09:03:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:53,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:03:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:53,687 INFO L225 Difference]: With dead ends: 4121 [2020-12-22 09:03:53,687 INFO L226 Difference]: Without dead ends: 3047 [2020-12-22 09:03:53,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:03:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2020-12-22 09:03:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2080. [2020-12-22 09:03:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2080 states. [2020-12-22 09:03:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3364 transitions. [2020-12-22 09:03:53,850 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3364 transitions. Word has length 69 [2020-12-22 09:03:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:53,852 INFO L481 AbstractCegarLoop]: Abstraction has 2080 states and 3364 transitions. [2020-12-22 09:03:53,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3364 transitions. [2020-12-22 09:03:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:03:53,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:53,855 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] [2020-12-22 09:03:53,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:03:53,856 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1156873170, now seen corresponding path program 1 times [2020-12-22 09:03:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:53,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791924249] [2020-12-22 09:03:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:53,958 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 09:03:53,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791924249] [2020-12-22 09:03:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:53,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:53,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004768633] [2020-12-22 09:03:53,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:53,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:53,989 INFO L87 Difference]: Start difference. First operand 2080 states and 3364 transitions. Second operand 3 states. [2020-12-22 09:03:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:54,216 INFO L93 Difference]: Finished difference Result 4970 states and 8089 transitions. [2020-12-22 09:03:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:54,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:03:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:54,233 INFO L225 Difference]: With dead ends: 4970 [2020-12-22 09:03:54,233 INFO L226 Difference]: Without dead ends: 2947 [2020-12-22 09:03:54,239 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 09:03:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-12-22 09:03:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2945. [2020-12-22 09:03:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2945 states. [2020-12-22 09:03:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4783 transitions. [2020-12-22 09:03:54,467 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4783 transitions. Word has length 70 [2020-12-22 09:03:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:54,468 INFO L481 AbstractCegarLoop]: Abstraction has 2945 states and 4783 transitions. [2020-12-22 09:03:54,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4783 transitions. [2020-12-22 09:03:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:03:54,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:54,469 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] [2020-12-22 09:03:54,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:03:54,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1843763252, now seen corresponding path program 1 times [2020-12-22 09:03:54,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:54,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370320173] [2020-12-22 09:03:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:54,560 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 09:03:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370320173] [2020-12-22 09:03:54,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:54,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294801785] [2020-12-22 09:03:54,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:54,565 INFO L87 Difference]: Start difference. First operand 2945 states and 4783 transitions. Second operand 3 states. [2020-12-22 09:03:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:54,807 INFO L93 Difference]: Finished difference Result 5677 states and 9250 transitions. [2020-12-22 09:03:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:54,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:03:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:54,832 INFO L225 Difference]: With dead ends: 5677 [2020-12-22 09:03:54,832 INFO L226 Difference]: Without dead ends: 4055 [2020-12-22 09:03:54,838 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 09:03:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2020-12-22 09:03:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 4053. [2020-12-22 09:03:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-12-22 09:03:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6559 transitions. [2020-12-22 09:03:55,140 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6559 transitions. Word has length 70 [2020-12-22 09:03:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:55,141 INFO L481 AbstractCegarLoop]: Abstraction has 4053 states and 6559 transitions. [2020-12-22 09:03:55,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6559 transitions. [2020-12-22 09:03:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:03:55,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:55,148 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] [2020-12-22 09:03:55,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:03:55,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1414453242, now seen corresponding path program 1 times [2020-12-22 09:03:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:55,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833351048] [2020-12-22 09:03:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:55,291 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 09:03:55,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833351048] [2020-12-22 09:03:55,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:55,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:55,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670140575] [2020-12-22 09:03:55,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:55,294 INFO L87 Difference]: Start difference. First operand 4053 states and 6559 transitions. Second operand 4 states. [2020-12-22 09:03:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:55,911 INFO L93 Difference]: Finished difference Result 13149 states and 21349 transitions. [2020-12-22 09:03:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:55,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:03:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:55,962 INFO L225 Difference]: With dead ends: 13149 [2020-12-22 09:03:55,962 INFO L226 Difference]: Without dead ends: 9171 [2020-12-22 09:03:55,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:03:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9171 states. [2020-12-22 09:03:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9171 to 6434. [2020-12-22 09:03:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6434 states. [2020-12-22 09:03:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 10368 transitions. [2020-12-22 09:03:56,530 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 10368 transitions. Word has length 70 [2020-12-22 09:03:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:56,531 INFO L481 AbstractCegarLoop]: Abstraction has 6434 states and 10368 transitions. [2020-12-22 09:03:56,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 10368 transitions. [2020-12-22 09:03:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:03:56,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:56,533 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] [2020-12-22 09:03:56,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:03:56,533 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1510229994, now seen corresponding path program 1 times [2020-12-22 09:03:56,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:56,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649474711] [2020-12-22 09:03:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:56,597 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 09:03:56,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649474711] [2020-12-22 09:03:56,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:56,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:56,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880453907] [2020-12-22 09:03:56,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:56,609 INFO L87 Difference]: Start difference. First operand 6434 states and 10368 transitions. Second operand 3 states. [2020-12-22 09:03:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:57,179 INFO L93 Difference]: Finished difference Result 12442 states and 20091 transitions. [2020-12-22 09:03:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:57,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 09:03:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:57,212 INFO L225 Difference]: With dead ends: 12442 [2020-12-22 09:03:57,212 INFO L226 Difference]: Without dead ends: 8786 [2020-12-22 09:03:57,219 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 09:03:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8786 states. [2020-12-22 09:03:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8786 to 8784. [2020-12-22 09:03:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8784 states. [2020-12-22 09:03:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 14070 transitions. [2020-12-22 09:03:57,825 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 14070 transitions. Word has length 70 [2020-12-22 09:03:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:57,825 INFO L481 AbstractCegarLoop]: Abstraction has 8784 states and 14070 transitions. [2020-12-22 09:03:57,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 14070 transitions. [2020-12-22 09:03:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:03:57,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:57,827 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] [2020-12-22 09:03:57,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:03:57,828 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash 844989402, now seen corresponding path program 1 times [2020-12-22 09:03:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:57,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452307463] [2020-12-22 09:03:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:57,918 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 09:03:57,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452307463] [2020-12-22 09:03:57,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:57,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:57,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81958368] [2020-12-22 09:03:57,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:57,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:57,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:57,924 INFO L87 Difference]: Start difference. First operand 8784 states and 14070 transitions. Second operand 4 states. [2020-12-22 09:03:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:59,276 INFO L93 Difference]: Finished difference Result 28569 states and 45861 transitions. [2020-12-22 09:03:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:59,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:03:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:59,351 INFO L225 Difference]: With dead ends: 28569 [2020-12-22 09:03:59,351 INFO L226 Difference]: Without dead ends: 19876 [2020-12-22 09:03:59,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:03:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19876 states. [2020-12-22 09:04:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19876 to 13833. [2020-12-22 09:04:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13833 states. [2020-12-22 09:04:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 22023 transitions. [2020-12-22 09:04:00,274 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 22023 transitions. Word has length 71 [2020-12-22 09:04:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:00,274 INFO L481 AbstractCegarLoop]: Abstraction has 13833 states and 22023 transitions. [2020-12-22 09:04:00,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 22023 transitions. [2020-12-22 09:04:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:04:00,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:00,276 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] [2020-12-22 09:04:00,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:04:00,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1231314837, now seen corresponding path program 1 times [2020-12-22 09:04:00,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:00,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395771934] [2020-12-22 09:04:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:00,387 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 09:04:00,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395771934] [2020-12-22 09:04:00,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:00,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:00,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640159865] [2020-12-22 09:04:00,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:00,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:00,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:00,390 INFO L87 Difference]: Start difference. First operand 13833 states and 22023 transitions. Second operand 4 states. [2020-12-22 09:04:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:02,765 INFO L93 Difference]: Finished difference Result 40913 states and 65086 transitions. [2020-12-22 09:04:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:02,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:04:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:02,846 INFO L225 Difference]: With dead ends: 40913 [2020-12-22 09:04:02,846 INFO L226 Difference]: Without dead ends: 27089 [2020-12-22 09:04:02,870 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 09:04:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27089 states. [2020-12-22 09:04:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27089 to 27087. [2020-12-22 09:04:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27087 states. [2020-12-22 09:04:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27087 states to 27087 states and 42872 transitions. [2020-12-22 09:04:04,466 INFO L78 Accepts]: Start accepts. Automaton has 27087 states and 42872 transitions. Word has length 73 [2020-12-22 09:04:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:04,466 INFO L481 AbstractCegarLoop]: Abstraction has 27087 states and 42872 transitions. [2020-12-22 09:04:04,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 27087 states and 42872 transitions. [2020-12-22 09:04:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:04:04,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:04,467 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] [2020-12-22 09:04:04,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:04:04,468 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash -940832745, now seen corresponding path program 1 times [2020-12-22 09:04:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:04,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562456936] [2020-12-22 09:04:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:04,500 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 09:04:04,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562456936] [2020-12-22 09:04:04,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:04,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:04,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538093553] [2020-12-22 09:04:04,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:04,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:04,502 INFO L87 Difference]: Start difference. First operand 27087 states and 42872 transitions. Second operand 3 states. [2020-12-22 09:04:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:07,312 INFO L93 Difference]: Finished difference Result 81223 states and 128554 transitions. [2020-12-22 09:04:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:07,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:04:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:07,459 INFO L225 Difference]: With dead ends: 81223 [2020-12-22 09:04:07,459 INFO L226 Difference]: Without dead ends: 54164 [2020-12-22 09:04:07,510 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 09:04:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54164 states. [2020-12-22 09:04:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54164 to 27089. [2020-12-22 09:04:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27089 states. [2020-12-22 09:04:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27089 states to 27089 states and 42874 transitions. [2020-12-22 09:04:09,575 INFO L78 Accepts]: Start accepts. Automaton has 27089 states and 42874 transitions. Word has length 74 [2020-12-22 09:04:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:09,576 INFO L481 AbstractCegarLoop]: Abstraction has 27089 states and 42874 transitions. [2020-12-22 09:04:09,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27089 states and 42874 transitions. [2020-12-22 09:04:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:04:09,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:09,577 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] [2020-12-22 09:04:09,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:04:09,578 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 826320946, now seen corresponding path program 1 times [2020-12-22 09:04:09,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:09,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964000098] [2020-12-22 09:04:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:09,620 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 09:04:09,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964000098] [2020-12-22 09:04:09,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:09,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:09,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437875193] [2020-12-22 09:04:09,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:09,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:09,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:09,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:09,623 INFO L87 Difference]: Start difference. First operand 27089 states and 42874 transitions. Second operand 3 states. [2020-12-22 09:04:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:11,666 INFO L93 Difference]: Finished difference Result 63195 states and 99826 transitions. [2020-12-22 09:04:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:11,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:04:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:11,739 INFO L225 Difference]: With dead ends: 63195 [2020-12-22 09:04:11,739 INFO L226 Difference]: Without dead ends: 36235 [2020-12-22 09:04:11,773 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 09:04:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36235 states. [2020-12-22 09:04:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36235 to 35323. [2020-12-22 09:04:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35323 states. [2020-12-22 09:04:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35323 states to 35323 states and 55204 transitions. [2020-12-22 09:04:14,061 INFO L78 Accepts]: Start accepts. Automaton has 35323 states and 55204 transitions. Word has length 74 [2020-12-22 09:04:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:14,062 INFO L481 AbstractCegarLoop]: Abstraction has 35323 states and 55204 transitions. [2020-12-22 09:04:14,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 35323 states and 55204 transitions. [2020-12-22 09:04:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:04:14,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:14,063 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] [2020-12-22 09:04:14,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:04:14,063 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1329573307, now seen corresponding path program 1 times [2020-12-22 09:04:14,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:14,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55541295] [2020-12-22 09:04:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:14,128 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 09:04:14,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55541295] [2020-12-22 09:04:14,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:14,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459629336] [2020-12-22 09:04:14,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:14,130 INFO L87 Difference]: Start difference. First operand 35323 states and 55204 transitions. Second operand 3 states. [2020-12-22 09:04:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:17,973 INFO L93 Difference]: Finished difference Result 103330 states and 161322 transitions. [2020-12-22 09:04:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:17,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:04:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:18,087 INFO L225 Difference]: With dead ends: 103330 [2020-12-22 09:04:18,087 INFO L226 Difference]: Without dead ends: 68180 [2020-12-22 09:04:18,120 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 09:04:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68180 states. [2020-12-22 09:04:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68180 to 68178. [2020-12-22 09:04:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68178 states. [2020-12-22 09:04:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68178 states to 68178 states and 105617 transitions. [2020-12-22 09:04:22,415 INFO L78 Accepts]: Start accepts. Automaton has 68178 states and 105617 transitions. Word has length 75 [2020-12-22 09:04:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:22,419 INFO L481 AbstractCegarLoop]: Abstraction has 68178 states and 105617 transitions. [2020-12-22 09:04:22,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 68178 states and 105617 transitions. [2020-12-22 09:04:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:04:22,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:22,421 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] [2020-12-22 09:04:22,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:04:22,421 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash -121452674, now seen corresponding path program 1 times [2020-12-22 09:04:22,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:22,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145295489] [2020-12-22 09:04:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:22,561 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 09:04:22,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145295489] [2020-12-22 09:04:22,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:22,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:22,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556446513] [2020-12-22 09:04:22,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:22,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:22,563 INFO L87 Difference]: Start difference. First operand 68178 states and 105617 transitions. Second operand 5 states. [2020-12-22 09:04:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:30,492 INFO L93 Difference]: Finished difference Result 197409 states and 305821 transitions. [2020-12-22 09:04:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:30,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:04:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:30,895 INFO L225 Difference]: With dead ends: 197409 [2020-12-22 09:04:30,895 INFO L226 Difference]: Without dead ends: 129245 [2020-12-22 09:04:30,976 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 09:04:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129245 states. [2020-12-22 09:04:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129245 to 129243. [2020-12-22 09:04:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129243 states. [2020-12-22 09:04:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129243 states to 129243 states and 198894 transitions. [2020-12-22 09:04:39,481 INFO L78 Accepts]: Start accepts. Automaton has 129243 states and 198894 transitions. Word has length 75 [2020-12-22 09:04:39,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:39,481 INFO L481 AbstractCegarLoop]: Abstraction has 129243 states and 198894 transitions. [2020-12-22 09:04:39,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 129243 states and 198894 transitions. [2020-12-22 09:04:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:04:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:39,486 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] [2020-12-22 09:04:39,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:39,486 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash 816290506, now seen corresponding path program 1 times [2020-12-22 09:04:39,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:39,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12241966] [2020-12-22 09:04:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:39,650 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 09:04:39,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12241966] [2020-12-22 09:04:39,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:39,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214959476] [2020-12-22 09:04:39,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:39,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:39,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:39,655 INFO L87 Difference]: Start difference. First operand 129243 states and 198894 transitions. Second operand 4 states. [2020-12-22 09:04:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:55,380 INFO L93 Difference]: Finished difference Result 378534 states and 581681 transitions. [2020-12-22 09:04:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:55,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:04:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:56,101 INFO L225 Difference]: With dead ends: 378534 [2020-12-22 09:04:56,101 INFO L226 Difference]: Without dead ends: 249347 [2020-12-22 09:04:56,220 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 09:04:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249347 states. [2020-12-22 09:05:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249347 to 249345. [2020-12-22 09:05:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249345 states. [2020-12-22 09:05:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249345 states to 249345 states and 380463 transitions. [2020-12-22 09:05:13,648 INFO L78 Accepts]: Start accepts. Automaton has 249345 states and 380463 transitions. Word has length 75 [2020-12-22 09:05:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:13,648 INFO L481 AbstractCegarLoop]: Abstraction has 249345 states and 380463 transitions. [2020-12-22 09:05:13,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 249345 states and 380463 transitions. [2020-12-22 09:05:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:05:13,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:13,651 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] [2020-12-22 09:05:13,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:05:13,651 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash -353140970, now seen corresponding path program 1 times [2020-12-22 09:05:13,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:13,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329540335] [2020-12-22 09:05:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:13,698 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 09:05:13,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329540335] [2020-12-22 09:05:13,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:13,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:13,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187872521] [2020-12-22 09:05:13,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:13,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:13,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:13,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:13,700 INFO L87 Difference]: Start difference. First operand 249345 states and 380463 transitions. Second operand 3 states. [2020-12-22 09:05:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:46,045 INFO L93 Difference]: Finished difference Result 747883 states and 1141156 transitions. [2020-12-22 09:05:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:46,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:05:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:47,212 INFO L225 Difference]: With dead ends: 747883 [2020-12-22 09:05:47,212 INFO L226 Difference]: Without dead ends: 498629 [2020-12-22 09:05:47,502 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 09:05:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498629 states.