/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/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:40:41,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:40:41,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:40:41,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:40:41,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:40:41,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:40:41,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:40:41,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:40:41,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:40:41,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:40:41,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:40:41,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:40:41,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:40:41,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:40:41,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:40:41,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:40:41,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:40:41,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:40:41,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:40:41,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:40:41,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:40:41,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:40:41,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:40:41,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:40:41,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:40:41,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:40:41,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:40:41,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:40:41,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:40:41,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:40:41,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:40:41,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:40:41,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:40:41,745 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:40:41,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:40:41,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:40:41,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:40:41,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:40:41,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:40:41,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:40:41,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:40:41,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:40:41,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:40:41,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:40:41,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:40:41,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:40:41,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:40:41,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:40:41,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:40:41,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:40:41,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:40:41,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:40:41,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:40:41,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:40:41,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:40:42,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:40:42,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:40:42,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:40:42,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:40:42,201 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:40:42,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:40:42,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e9cf26b4/ae0e48035b644672b554a9367788c95c/FLAGde9745b5e [2020-12-22 07:40:42,864 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:40:42,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:40:42,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e9cf26b4/ae0e48035b644672b554a9367788c95c/FLAGde9745b5e [2020-12-22 07:40:43,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e9cf26b4/ae0e48035b644672b554a9367788c95c [2020-12-22 07:40:43,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:40:43,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:40:43,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:43,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:40:43,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:40:43,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494a35b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43, skipping insertion in model container [2020-12-22 07:40:43,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:40:43,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:40:43,601 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/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c[14511,14524] [2020-12-22 07:40:43,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:43,623 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:40:43,717 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/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c[14511,14524] [2020-12-22 07:40:43,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:43,745 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:40:43,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43 WrapperNode [2020-12-22 07:40:43,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:43,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:43,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:40:43,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:40:43,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:43,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:40:43,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:40:43,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:40:43,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (1/1) ... [2020-12-22 07:40:43,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:40:43,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:40:43,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:40:43,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:40:43,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (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 07:40:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:40:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:40:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:40:43,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:40:44,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:40:44,967 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:40:44,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:44 BoogieIcfgContainer [2020-12-22 07:40:44,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:40:44,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:40:44,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:40:44,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:40:44,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:40:43" (1/3) ... [2020-12-22 07:40:44,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21aac5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:44, skipping insertion in model container [2020-12-22 07:40:44,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:43" (2/3) ... [2020-12-22 07:40:44,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21aac5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:40:44, skipping insertion in model container [2020-12-22 07:40:44,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:40:44" (3/3) ... [2020-12-22 07:40:44,989 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:40:44,997 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:40:45,002 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:40:45,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:40:45,055 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:40:45,056 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:40:45,056 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:40:45,056 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:40:45,056 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:40:45,057 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:40:45,057 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:40:45,057 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:40:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 07:40:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:40:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:45,084 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] [2020-12-22 07:40:45,085 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2020-12-22 07:40:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:45,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843204623] [2020-12-22 07:40:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:45,364 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 07:40:45,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843204623] [2020-12-22 07:40:45,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:40:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044434054] [2020-12-22 07:40:45,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:40:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:40:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:40:45,392 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 2 states. [2020-12-22 07:40:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:45,427 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2020-12-22 07:40:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:40:45,428 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:40:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:45,442 INFO L225 Difference]: With dead ends: 233 [2020-12-22 07:40:45,442 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:40:45,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:40:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:40:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:40:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:40:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2020-12-22 07:40:45,500 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 37 [2020-12-22 07:40:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:45,501 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2020-12-22 07:40:45,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:40:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2020-12-22 07:40:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:40:45,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:45,504 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] [2020-12-22 07:40:45,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:40:45,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2020-12-22 07:40:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:45,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447629130] [2020-12-22 07:40:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:45,661 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 07:40:45,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447629130] [2020-12-22 07:40:45,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:45,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:40:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708775294] [2020-12-22 07:40:45,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:40:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:40:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:45,666 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand 5 states. [2020-12-22 07:40:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:45,898 INFO L93 Difference]: Finished difference Result 232 states and 394 transitions. [2020-12-22 07:40:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:40:45,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:40:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:45,906 INFO L225 Difference]: With dead ends: 232 [2020-12-22 07:40:45,906 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:40:45,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:40:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:40:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:40:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:40:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 219 transitions. [2020-12-22 07:40:45,935 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 219 transitions. Word has length 37 [2020-12-22 07:40:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:45,935 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 219 transitions. [2020-12-22 07:40:45,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:40:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 219 transitions. [2020-12-22 07:40:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:40:45,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:45,943 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 07:40:45,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:40:45,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2020-12-22 07:40:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:45,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883109522] [2020-12-22 07:40:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:46,129 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 07:40:46,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883109522] [2020-12-22 07:40:46,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:46,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111929858] [2020-12-22 07:40:46,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:46,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:46,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:46,133 INFO L87 Difference]: Start difference. First operand 144 states and 219 transitions. Second operand 3 states. [2020-12-22 07:40:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:46,222 INFO L93 Difference]: Finished difference Result 294 states and 469 transitions. [2020-12-22 07:40:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:46,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:40:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:46,225 INFO L225 Difference]: With dead ends: 294 [2020-12-22 07:40:46,225 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 07:40:46,226 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 07:40:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 07:40:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-12-22 07:40:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 07:40:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 320 transitions. [2020-12-22 07:40:46,240 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 320 transitions. Word has length 66 [2020-12-22 07:40:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:46,240 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 320 transitions. [2020-12-22 07:40:46,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 320 transitions. [2020-12-22 07:40:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:40:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:46,243 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 07:40:46,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:40:46,243 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2020-12-22 07:40:46,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:46,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082597953] [2020-12-22 07:40:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:46,387 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 07:40:46,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082597953] [2020-12-22 07:40:46,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:46,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:46,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498718435] [2020-12-22 07:40:46,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:46,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:46,393 INFO L87 Difference]: Start difference. First operand 207 states and 320 transitions. Second operand 3 states. [2020-12-22 07:40:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:46,451 INFO L93 Difference]: Finished difference Result 485 states and 776 transitions. [2020-12-22 07:40:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:46,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:40:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:46,457 INFO L225 Difference]: With dead ends: 485 [2020-12-22 07:40:46,457 INFO L226 Difference]: Without dead ends: 338 [2020-12-22 07:40:46,460 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 07:40:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-22 07:40:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2020-12-22 07:40:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 07:40:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 527 transitions. [2020-12-22 07:40:46,493 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 527 transitions. Word has length 68 [2020-12-22 07:40:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:46,494 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 527 transitions. [2020-12-22 07:40:46,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 527 transitions. [2020-12-22 07:40:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:40:46,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:46,496 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 07:40:46,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:40:46,497 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2020-12-22 07:40:46,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:46,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520129095] [2020-12-22 07:40:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:46,653 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 07:40:46,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520129095] [2020-12-22 07:40:46,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:46,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900469559] [2020-12-22 07:40:46,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:46,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:46,657 INFO L87 Difference]: Start difference. First operand 334 states and 527 transitions. Second operand 3 states. [2020-12-22 07:40:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:46,712 INFO L93 Difference]: Finished difference Result 850 states and 1369 transitions. [2020-12-22 07:40:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:46,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:40:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:46,717 INFO L225 Difference]: With dead ends: 850 [2020-12-22 07:40:46,717 INFO L226 Difference]: Without dead ends: 576 [2020-12-22 07:40:46,718 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 07:40:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-12-22 07:40:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 570. [2020-12-22 07:40:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-12-22 07:40:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 907 transitions. [2020-12-22 07:40:46,742 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 907 transitions. Word has length 70 [2020-12-22 07:40:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:46,743 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 907 transitions. [2020-12-22 07:40:46,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 907 transitions. [2020-12-22 07:40:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:40:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:46,745 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] [2020-12-22 07:40:46,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:40:46,745 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2020-12-22 07:40:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:46,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148846228] [2020-12-22 07:40:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:46,940 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 07:40:46,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148846228] [2020-12-22 07:40:46,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:46,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:40:46,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339073214] [2020-12-22 07:40:46,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:40:46,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:46,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:40:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:46,943 INFO L87 Difference]: Start difference. First operand 570 states and 907 transitions. Second operand 5 states. [2020-12-22 07:40:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:47,226 INFO L93 Difference]: Finished difference Result 2616 states and 4252 transitions. [2020-12-22 07:40:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:40:47,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:40:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:47,238 INFO L225 Difference]: With dead ends: 2616 [2020-12-22 07:40:47,238 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 07:40:47,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:40:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 07:40:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1062. [2020-12-22 07:40:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-12-22 07:40:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1703 transitions. [2020-12-22 07:40:47,288 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1703 transitions. Word has length 72 [2020-12-22 07:40:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:47,288 INFO L481 AbstractCegarLoop]: Abstraction has 1062 states and 1703 transitions. [2020-12-22 07:40:47,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:40:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1703 transitions. [2020-12-22 07:40:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:40:47,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:47,290 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 07:40:47,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:40:47,291 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2020-12-22 07:40:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699531572] [2020-12-22 07:40:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:47,359 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 07:40:47,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699531572] [2020-12-22 07:40:47,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:47,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560238086] [2020-12-22 07:40:47,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:47,362 INFO L87 Difference]: Start difference. First operand 1062 states and 1703 transitions. Second operand 4 states. [2020-12-22 07:40:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:47,525 INFO L93 Difference]: Finished difference Result 3858 states and 6242 transitions. [2020-12-22 07:40:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:47,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:40:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:47,556 INFO L225 Difference]: With dead ends: 3858 [2020-12-22 07:40:47,556 INFO L226 Difference]: Without dead ends: 2856 [2020-12-22 07:40:47,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:40:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2020-12-22 07:40:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 1950. [2020-12-22 07:40:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1950 states. [2020-12-22 07:40:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 3131 transitions. [2020-12-22 07:40:47,638 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 3131 transitions. Word has length 73 [2020-12-22 07:40:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:47,639 INFO L481 AbstractCegarLoop]: Abstraction has 1950 states and 3131 transitions. [2020-12-22 07:40:47,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 3131 transitions. [2020-12-22 07:40:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:40:47,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:47,641 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 07:40:47,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:40:47,642 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2020-12-22 07:40:47,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:47,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732238538] [2020-12-22 07:40:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:47,705 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 07:40:47,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732238538] [2020-12-22 07:40:47,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:47,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:47,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034439760] [2020-12-22 07:40:47,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:47,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:47,708 INFO L87 Difference]: Start difference. First operand 1950 states and 3131 transitions. Second operand 4 states. [2020-12-22 07:40:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:47,915 INFO L93 Difference]: Finished difference Result 5736 states and 9278 transitions. [2020-12-22 07:40:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:47,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:40:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:47,935 INFO L225 Difference]: With dead ends: 5736 [2020-12-22 07:40:47,936 INFO L226 Difference]: Without dead ends: 3846 [2020-12-22 07:40:47,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:40:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2020-12-22 07:40:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 2882. [2020-12-22 07:40:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2882 states. [2020-12-22 07:40:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4621 transitions. [2020-12-22 07:40:48,086 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4621 transitions. Word has length 74 [2020-12-22 07:40:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:48,087 INFO L481 AbstractCegarLoop]: Abstraction has 2882 states and 4621 transitions. [2020-12-22 07:40:48,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4621 transitions. [2020-12-22 07:40:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:40:48,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:48,089 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 07:40:48,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:40:48,090 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2020-12-22 07:40:48,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:48,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380892065] [2020-12-22 07:40:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:48,177 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 07:40:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380892065] [2020-12-22 07:40:48,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:48,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209001117] [2020-12-22 07:40:48,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:48,180 INFO L87 Difference]: Start difference. First operand 2882 states and 4621 transitions. Second operand 4 states. [2020-12-22 07:40:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:48,399 INFO L93 Difference]: Finished difference Result 8448 states and 13626 transitions. [2020-12-22 07:40:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:48,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:40:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:48,427 INFO L225 Difference]: With dead ends: 8448 [2020-12-22 07:40:48,427 INFO L226 Difference]: Without dead ends: 5626 [2020-12-22 07:40:48,433 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 07:40:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2020-12-22 07:40:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4232. [2020-12-22 07:40:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4232 states. [2020-12-22 07:40:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 6771 transitions. [2020-12-22 07:40:48,657 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 6771 transitions. Word has length 75 [2020-12-22 07:40:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:48,657 INFO L481 AbstractCegarLoop]: Abstraction has 4232 states and 6771 transitions. [2020-12-22 07:40:48,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 6771 transitions. [2020-12-22 07:40:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:48,660 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 07:40:48,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:40:48,661 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2020-12-22 07:40:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:48,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122859185] [2020-12-22 07:40:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:48,718 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 07:40:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122859185] [2020-12-22 07:40:48,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:48,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532219446] [2020-12-22 07:40:48,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:48,721 INFO L87 Difference]: Start difference. First operand 4232 states and 6771 transitions. Second operand 3 states. [2020-12-22 07:40:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:48,903 INFO L93 Difference]: Finished difference Result 9496 states and 15200 transitions. [2020-12-22 07:40:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:48,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:48,936 INFO L225 Difference]: With dead ends: 9496 [2020-12-22 07:40:48,936 INFO L226 Difference]: Without dead ends: 6500 [2020-12-22 07:40:48,943 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 07:40:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2020-12-22 07:40:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 6498. [2020-12-22 07:40:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6498 states. [2020-12-22 07:40:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 10304 transitions. [2020-12-22 07:40:49,223 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 10304 transitions. Word has length 76 [2020-12-22 07:40:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:49,224 INFO L481 AbstractCegarLoop]: Abstraction has 6498 states and 10304 transitions. [2020-12-22 07:40:49,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 10304 transitions. [2020-12-22 07:40:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:49,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:49,225 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 07:40:49,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:40:49,226 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2020-12-22 07:40:49,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:49,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789327129] [2020-12-22 07:40:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:49,272 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 07:40:49,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789327129] [2020-12-22 07:40:49,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:49,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:49,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170266632] [2020-12-22 07:40:49,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:49,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:49,274 INFO L87 Difference]: Start difference. First operand 6498 states and 10304 transitions. Second operand 3 states. [2020-12-22 07:40:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:49,580 INFO L93 Difference]: Finished difference Result 14068 states and 22346 transitions. [2020-12-22 07:40:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:49,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:49,613 INFO L225 Difference]: With dead ends: 14068 [2020-12-22 07:40:49,613 INFO L226 Difference]: Without dead ends: 9494 [2020-12-22 07:40:49,621 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 07:40:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2020-12-22 07:40:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 9492. [2020-12-22 07:40:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9492 states. [2020-12-22 07:40:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9492 states to 9492 states and 14932 transitions. [2020-12-22 07:40:50,058 INFO L78 Accepts]: Start accepts. Automaton has 9492 states and 14932 transitions. Word has length 76 [2020-12-22 07:40:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:50,058 INFO L481 AbstractCegarLoop]: Abstraction has 9492 states and 14932 transitions. [2020-12-22 07:40:50,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 9492 states and 14932 transitions. [2020-12-22 07:40:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:50,060 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 07:40:50,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:40:50,060 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash 700947013, now seen corresponding path program 1 times [2020-12-22 07:40:50,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:50,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873033147] [2020-12-22 07:40:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:50,103 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 07:40:50,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873033147] [2020-12-22 07:40:50,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:50,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208258354] [2020-12-22 07:40:50,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:50,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:50,105 INFO L87 Difference]: Start difference. First operand 9492 states and 14932 transitions. Second operand 3 states. [2020-12-22 07:40:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:50,583 INFO L93 Difference]: Finished difference Result 22668 states and 35837 transitions. [2020-12-22 07:40:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:50,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:50,618 INFO L225 Difference]: With dead ends: 22668 [2020-12-22 07:40:50,618 INFO L226 Difference]: Without dead ends: 13262 [2020-12-22 07:40:50,632 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 07:40:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2020-12-22 07:40:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 13260. [2020-12-22 07:40:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13260 states. [2020-12-22 07:40:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 20929 transitions. [2020-12-22 07:40:51,238 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 20929 transitions. Word has length 76 [2020-12-22 07:40:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:51,238 INFO L481 AbstractCegarLoop]: Abstraction has 13260 states and 20929 transitions. [2020-12-22 07:40:51,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 20929 transitions. [2020-12-22 07:40:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:40:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:51,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:51,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:40:51,241 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2020-12-22 07:40:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:51,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377939172] [2020-12-22 07:40:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:51,414 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 07:40:51,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377939172] [2020-12-22 07:40:51,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:51,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:51,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750188005] [2020-12-22 07:40:51,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:51,417 INFO L87 Difference]: Start difference. First operand 13260 states and 20929 transitions. Second operand 4 states. [2020-12-22 07:40:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:52,367 INFO L93 Difference]: Finished difference Result 39378 states and 62080 transitions. [2020-12-22 07:40:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:52,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:40:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:52,428 INFO L225 Difference]: With dead ends: 39378 [2020-12-22 07:40:52,428 INFO L226 Difference]: Without dead ends: 26127 [2020-12-22 07:40:52,450 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 07:40:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26127 states. [2020-12-22 07:40:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26127 to 26125. [2020-12-22 07:40:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26125 states. [2020-12-22 07:40:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26125 states to 26125 states and 40960 transitions. [2020-12-22 07:40:53,575 INFO L78 Accepts]: Start accepts. Automaton has 26125 states and 40960 transitions. Word has length 77 [2020-12-22 07:40:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:53,575 INFO L481 AbstractCegarLoop]: Abstraction has 26125 states and 40960 transitions. [2020-12-22 07:40:53,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 26125 states and 40960 transitions. [2020-12-22 07:40:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:40:53,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:53,577 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, 1, 1, 1, 1] [2020-12-22 07:40:53,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:40:53,578 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1502774817, now seen corresponding path program 1 times [2020-12-22 07:40:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:53,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291023253] [2020-12-22 07:40:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:53,629 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 07:40:53,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291023253] [2020-12-22 07:40:53,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:53,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:53,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805786395] [2020-12-22 07:40:53,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:53,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:53,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:53,632 INFO L87 Difference]: Start difference. First operand 26125 states and 40960 transitions. Second operand 3 states. [2020-12-22 07:40:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:54,838 INFO L93 Difference]: Finished difference Result 61313 states and 95762 transitions. [2020-12-22 07:40:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:54,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:54,929 INFO L225 Difference]: With dead ends: 61313 [2020-12-22 07:40:54,930 INFO L226 Difference]: Without dead ends: 35317 [2020-12-22 07:40:54,965 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 07:40:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35317 states. [2020-12-22 07:40:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35317 to 34041. [2020-12-22 07:40:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34041 states. [2020-12-22 07:40:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34041 states to 34041 states and 52688 transitions. [2020-12-22 07:40:56,371 INFO L78 Accepts]: Start accepts. Automaton has 34041 states and 52688 transitions. Word has length 78 [2020-12-22 07:40:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:56,371 INFO L481 AbstractCegarLoop]: Abstraction has 34041 states and 52688 transitions. [2020-12-22 07:40:56,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 34041 states and 52688 transitions. [2020-12-22 07:40:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:40:56,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:56,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:56,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:40:56,373 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -225322511, now seen corresponding path program 1 times [2020-12-22 07:40:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:56,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595187868] [2020-12-22 07:40:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:56,404 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 07:40:56,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595187868] [2020-12-22 07:40:56,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:56,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:56,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185168619] [2020-12-22 07:40:56,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:56,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:56,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:56,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:56,407 INFO L87 Difference]: Start difference. First operand 34041 states and 52688 transitions. Second operand 3 states. [2020-12-22 07:40:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:57,914 INFO L93 Difference]: Finished difference Result 102085 states and 158002 transitions. [2020-12-22 07:40:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:57,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:58,098 INFO L225 Difference]: With dead ends: 102085 [2020-12-22 07:40:58,098 INFO L226 Difference]: Without dead ends: 68072 [2020-12-22 07:40:58,168 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 07:40:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68072 states. [2020-12-22 07:40:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68072 to 34043. [2020-12-22 07:40:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34043 states. [2020-12-22 07:40:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34043 states to 34043 states and 52690 transitions. [2020-12-22 07:40:59,723 INFO L78 Accepts]: Start accepts. Automaton has 34043 states and 52690 transitions. Word has length 78 [2020-12-22 07:40:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:59,723 INFO L481 AbstractCegarLoop]: Abstraction has 34043 states and 52690 transitions. [2020-12-22 07:40:59,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34043 states and 52690 transitions. [2020-12-22 07:40:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:40:59,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:59,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:59,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:40:59,725 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -577611119, now seen corresponding path program 1 times [2020-12-22 07:40:59,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:59,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475685394] [2020-12-22 07:40:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:59,814 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 07:40:59,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475685394] [2020-12-22 07:40:59,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:59,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:59,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758315403] [2020-12-22 07:40:59,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:59,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:59,817 INFO L87 Difference]: Start difference. First operand 34043 states and 52690 transitions. Second operand 4 states. [2020-12-22 07:41:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,710 INFO L93 Difference]: Finished difference Result 100591 states and 155448 transitions. [2020-12-22 07:41:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:01,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:41:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,807 INFO L225 Difference]: With dead ends: 100591 [2020-12-22 07:41:01,807 INFO L226 Difference]: Without dead ends: 66578 [2020-12-22 07:41:01,837 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 07:41:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66578 states. [2020-12-22 07:41:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66578 to 66576. [2020-12-22 07:41:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66576 states. [2020-12-22 07:41:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66576 states to 66576 states and 102186 transitions. [2020-12-22 07:41:04,254 INFO L78 Accepts]: Start accepts. Automaton has 66576 states and 102186 transitions. Word has length 79 [2020-12-22 07:41:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:04,255 INFO L481 AbstractCegarLoop]: Abstraction has 66576 states and 102186 transitions. [2020-12-22 07:41:04,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 66576 states and 102186 transitions. [2020-12-22 07:41:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:04,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:04,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:04,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:41:04,257 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1003564987, now seen corresponding path program 1 times [2020-12-22 07:41:04,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:04,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420168179] [2020-12-22 07:41:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:04,318 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 07:41:04,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420168179] [2020-12-22 07:41:04,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:04,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:04,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401739716] [2020-12-22 07:41:04,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:04,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:04,321 INFO L87 Difference]: Start difference. First operand 66576 states and 102186 transitions. Second operand 3 states. [2020-12-22 07:41:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:07,010 INFO L93 Difference]: Finished difference Result 161640 states and 249118 transitions. [2020-12-22 07:41:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:07,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:07,159 INFO L225 Difference]: With dead ends: 161640 [2020-12-22 07:41:07,159 INFO L226 Difference]: Without dead ends: 95344 [2020-12-22 07:41:07,215 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 07:41:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95344 states. [2020-12-22 07:41:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95344 to 91494. [2020-12-22 07:41:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91494 states. [2020-12-22 07:41:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91494 states to 91494 states and 139758 transitions. [2020-12-22 07:41:10,719 INFO L78 Accepts]: Start accepts. Automaton has 91494 states and 139758 transitions. Word has length 80 [2020-12-22 07:41:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:10,719 INFO L481 AbstractCegarLoop]: Abstraction has 91494 states and 139758 transitions. [2020-12-22 07:41:10,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 91494 states and 139758 transitions. [2020-12-22 07:41:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:10,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:10,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:10,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:41:10,722 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1064997795, now seen corresponding path program 1 times [2020-12-22 07:41:10,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:10,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655660234] [2020-12-22 07:41:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:10,761 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 07:41:10,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655660234] [2020-12-22 07:41:10,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:10,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:10,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161195669] [2020-12-22 07:41:10,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:10,770 INFO L87 Difference]: Start difference. First operand 91494 states and 139758 transitions. Second operand 3 states. [2020-12-22 07:41:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:16,378 INFO L93 Difference]: Finished difference Result 274406 states and 419154 transitions. [2020-12-22 07:41:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:16,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:16,864 INFO L225 Difference]: With dead ends: 274406 [2020-12-22 07:41:16,864 INFO L226 Difference]: Without dead ends: 182956 [2020-12-22 07:41:16,966 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 07:41:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182956 states. [2020-12-22 07:41:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182956 to 91498. [2020-12-22 07:41:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91498 states. [2020-12-22 07:41:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91498 states to 91498 states and 139762 transitions. [2020-12-22 07:41:21,108 INFO L78 Accepts]: Start accepts. Automaton has 91498 states and 139762 transitions. Word has length 80 [2020-12-22 07:41:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:21,109 INFO L481 AbstractCegarLoop]: Abstraction has 91498 states and 139762 transitions. [2020-12-22 07:41:21,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 91498 states and 139762 transitions. [2020-12-22 07:41:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:41:21,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:21,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:21,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:41:21,113 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1530707325, now seen corresponding path program 1 times [2020-12-22 07:41:21,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:21,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617901475] [2020-12-22 07:41:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:21,229 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 07:41:21,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617901475] [2020-12-22 07:41:21,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:21,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634964651] [2020-12-22 07:41:21,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:21,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:21,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:21,235 INFO L87 Difference]: Start difference. First operand 91498 states and 139762 transitions. Second operand 4 states. [2020-12-22 07:41:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:27,314 INFO L93 Difference]: Finished difference Result 270242 states and 412042 transitions. [2020-12-22 07:41:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:27,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:41:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:27,646 INFO L225 Difference]: With dead ends: 270242 [2020-12-22 07:41:27,646 INFO L226 Difference]: Without dead ends: 178792 [2020-12-22 07:41:27,717 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 07:41:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178792 states. [2020-12-22 07:41:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178792 to 178790. [2020-12-22 07:41:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178790 states. [2020-12-22 07:41:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178790 states to 178790 states and 270616 transitions. [2020-12-22 07:41:34,737 INFO L78 Accepts]: Start accepts. Automaton has 178790 states and 270616 transitions. Word has length 81 [2020-12-22 07:41:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:34,737 INFO L481 AbstractCegarLoop]: Abstraction has 178790 states and 270616 transitions. [2020-12-22 07:41:34,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 178790 states and 270616 transitions. [2020-12-22 07:41:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:34,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:34,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:34,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:41:34,740 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1063976855, now seen corresponding path program 1 times [2020-12-22 07:41:34,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:34,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612773553] [2020-12-22 07:41:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:34,786 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 07:41:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612773553] [2020-12-22 07:41:34,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:34,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887356206] [2020-12-22 07:41:34,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:34,788 INFO L87 Difference]: Start difference. First operand 178790 states and 270616 transitions. Second operand 3 states. [2020-12-22 07:41:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:43,425 INFO L93 Difference]: Finished difference Result 435034 states and 662106 transitions. [2020-12-22 07:41:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:43,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:44,167 INFO L225 Difference]: With dead ends: 435034 [2020-12-22 07:41:44,167 INFO L226 Difference]: Without dead ends: 256808 [2020-12-22 07:41:44,300 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 07:41:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256808 states. [2020-12-22 07:41:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256808 to 245158. [2020-12-22 07:41:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245158 states. [2020-12-22 07:41:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245158 states to 245158 states and 368536 transitions. [2020-12-22 07:41:54,842 INFO L78 Accepts]: Start accepts. Automaton has 245158 states and 368536 transitions. Word has length 82 [2020-12-22 07:41:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:54,843 INFO L481 AbstractCegarLoop]: Abstraction has 245158 states and 368536 transitions. [2020-12-22 07:41:54,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 245158 states and 368536 transitions. [2020-12-22 07:41:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:54,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:54,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:54,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:41:54,848 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1085594423, now seen corresponding path program 1 times [2020-12-22 07:41:54,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:54,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521919076] [2020-12-22 07:41:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:54,910 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 07:41:54,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521919076] [2020-12-22 07:41:54,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:54,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735360391] [2020-12-22 07:41:54,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:54,915 INFO L87 Difference]: Start difference. First operand 245158 states and 368536 transitions. Second operand 3 states. [2020-12-22 07:42:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:11,020 INFO L93 Difference]: Finished difference Result 735050 states and 1105062 transitions. [2020-12-22 07:42:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:11,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:42:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:12,262 INFO L225 Difference]: With dead ends: 735050 [2020-12-22 07:42:12,262 INFO L226 Difference]: Without dead ends: 490224 [2020-12-22 07:42:12,485 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 07:42:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490224 states. [2020-12-22 07:42:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490224 to 245166. [2020-12-22 07:42:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245166 states. [2020-12-22 07:42:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245166 states to 245166 states and 368544 transitions. [2020-12-22 07:42:27,993 INFO L78 Accepts]: Start accepts. Automaton has 245166 states and 368544 transitions. Word has length 82 [2020-12-22 07:42:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:27,994 INFO L481 AbstractCegarLoop]: Abstraction has 245166 states and 368544 transitions. [2020-12-22 07:42:27,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 245166 states and 368544 transitions. [2020-12-22 07:42:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:28,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:28,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:28,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:42:28,013 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash 762927108, now seen corresponding path program 1 times [2020-12-22 07:42:28,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:28,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041862463] [2020-12-22 07:42:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:28,254 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 07:42:28,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041862463] [2020-12-22 07:42:28,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:28,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199166475] [2020-12-22 07:42:28,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:28,261 INFO L87 Difference]: Start difference. First operand 245166 states and 368544 transitions. Second operand 5 states. [2020-12-22 07:42:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:45,892 INFO L93 Difference]: Finished difference Result 693152 states and 1040937 transitions. [2020-12-22 07:42:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:45,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:42:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:46,832 INFO L225 Difference]: With dead ends: 693152 [2020-12-22 07:42:46,833 INFO L226 Difference]: Without dead ends: 448074 [2020-12-22 07:42:47,416 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 07:42:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448074 states. [2020-12-22 07:43:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448074 to 448072. [2020-12-22 07:43:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448072 states. [2020-12-22 07:43:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448072 states to 448072 states and 666753 transitions. [2020-12-22 07:43:08,006 INFO L78 Accepts]: Start accepts. Automaton has 448072 states and 666753 transitions. Word has length 83 [2020-12-22 07:43:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:08,007 INFO L481 AbstractCegarLoop]: Abstraction has 448072 states and 666753 transitions. [2020-12-22 07:43:08,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 448072 states and 666753 transitions. [2020-12-22 07:43:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:43:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:08,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:08,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:43:08,038 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1633117801, now seen corresponding path program 1 times [2020-12-22 07:43:08,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:08,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385832776] [2020-12-22 07:43:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:08,140 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 07:43:08,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385832776] [2020-12-22 07:43:08,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:08,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:08,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84870942] [2020-12-22 07:43:08,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:08,143 INFO L87 Difference]: Start difference. First operand 448072 states and 666753 transitions. Second operand 4 states. [2020-12-22 07:43:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:26,333 INFO L93 Difference]: Finished difference Result 796198 states and 1182987 transitions. [2020-12-22 07:43:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:26,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:43:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:27,030 INFO L225 Difference]: With dead ends: 796198 [2020-12-22 07:43:27,030 INFO L226 Difference]: Without dead ends: 348200 [2020-12-22 07:43:27,337 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 07:43:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348200 states. [2020-12-22 07:43:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348200 to 348200. [2020-12-22 07:43:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348200 states. [2020-12-22 07:43:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348200 states to 348200 states and 516337 transitions. [2020-12-22 07:43:43,213 INFO L78 Accepts]: Start accepts. Automaton has 348200 states and 516337 transitions. Word has length 83 [2020-12-22 07:43:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:43,213 INFO L481 AbstractCegarLoop]: Abstraction has 348200 states and 516337 transitions. [2020-12-22 07:43:43,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 348200 states and 516337 transitions. [2020-12-22 07:43:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:43:43,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:43,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:43,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:43,217 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 960344718, now seen corresponding path program 1 times [2020-12-22 07:43:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684493083] [2020-12-22 07:43:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:43,326 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 07:43:43,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684493083] [2020-12-22 07:43:43,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:43,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:43,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472287303] [2020-12-22 07:43:43,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:43,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:43,328 INFO L87 Difference]: Start difference. First operand 348200 states and 516337 transitions. Second operand 4 states. [2020-12-22 07:44:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:07,453 INFO L93 Difference]: Finished difference Result 916656 states and 1357870 transitions. [2020-12-22 07:44:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:07,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:44:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:08,691 INFO L225 Difference]: With dead ends: 916656 [2020-12-22 07:44:08,691 INFO L226 Difference]: Without dead ends: 568588 [2020-12-22 07:44:09,398 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 07:44:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568588 states.