/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:28:39,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:28:39,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:28:39,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:28:39,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:28:39,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:28:39,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:28:39,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:28:39,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:28:39,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:28:39,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:28:39,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 08:28:39,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:28:39,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:28:39,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:28:39,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:28:39,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:28:39,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:28:39,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:28:39,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:28:39,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:28:39,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:28:39,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:28:39,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:28:39,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:28:39,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:28:39,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:28:39,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:28:39,878 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:28:39,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:28:39,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:28:39,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:28:39,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:28:39,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:28:39,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:28:39,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:28:39,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:28:39,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:28:39,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:28:39,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:28:39,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:28:39,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:28:39,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:28:39,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:28:39,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:28:39,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:28:39,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:28:39,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:28:39,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:28:39,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:28:40,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:28:40,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:28:40,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:28:40,327 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:28:40,328 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:28:40,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:28:40,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35ab0a8a/f1cfd8c0cdb8406f9712608639683647/FLAG8e7eaac05 [2020-12-22 08:28:41,132 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:28:41,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:28:41,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35ab0a8a/f1cfd8c0cdb8406f9712608639683647/FLAG8e7eaac05 [2020-12-22 08:28:41,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d35ab0a8a/f1cfd8c0cdb8406f9712608639683647 [2020-12-22 08:28:41,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:28:41,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:28:41,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:41,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:28:41,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:28:41,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:41,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794b7884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41, skipping insertion in model container [2020-12-22 08:28:41,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:41,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:28:41,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:28:41,762 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5918,5931] [2020-12-22 08:28:41,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:41,891 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:28:41,947 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5918,5931] [2020-12-22 08:28:41,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:28:41,999 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:28:42,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41 WrapperNode [2020-12-22 08:28:42,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:28:42,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:42,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:28:42,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:28:42,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:28:42,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:28:42,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:28:42,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:28:42,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... [2020-12-22 08:28:42,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:28:42,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:28:42,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:28:42,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:28:42,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:28:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:28:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:28:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:28:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:28:43,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:28:43,276 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:28:43,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:43 BoogieIcfgContainer [2020-12-22 08:28:43,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:28:43,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:28:43,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:28:43,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:28:43,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:28:41" (1/3) ... [2020-12-22 08:28:43,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13144c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:43, skipping insertion in model container [2020-12-22 08:28:43,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:28:41" (2/3) ... [2020-12-22 08:28:43,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13144c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:28:43, skipping insertion in model container [2020-12-22 08:28:43,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:28:43" (3/3) ... [2020-12-22 08:28:43,295 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-12-22 08:28:43,302 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:28:43,309 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:28:43,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:28:43,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:28:43,381 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:28:43,382 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:28:43,382 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:28:43,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:28:43,382 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:28:43,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:28:43,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:28:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 08:28:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:28:43,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:43,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:43,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1065941507, now seen corresponding path program 1 times [2020-12-22 08:28:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:43,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736875591] [2020-12-22 08:28:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:44,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736875591] [2020-12-22 08:28:44,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:44,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340653149] [2020-12-22 08:28:44,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:44,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,072 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 3 states. [2020-12-22 08:28:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:44,168 INFO L93 Difference]: Finished difference Result 307 states and 498 transitions. [2020-12-22 08:28:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:44,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:28:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:44,186 INFO L225 Difference]: With dead ends: 307 [2020-12-22 08:28:44,187 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 08:28:44,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 08:28:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2020-12-22 08:28:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-22 08:28:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 303 transitions. [2020-12-22 08:28:44,267 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 303 transitions. Word has length 60 [2020-12-22 08:28:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:44,269 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 303 transitions. [2020-12-22 08:28:44,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 303 transitions. [2020-12-22 08:28:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:28:44,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:44,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:44,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:28:44,301 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1987406881, now seen corresponding path program 1 times [2020-12-22 08:28:44,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:44,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137787708] [2020-12-22 08:28:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:44,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137787708] [2020-12-22 08:28:44,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:44,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462415620] [2020-12-22 08:28:44,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,415 INFO L87 Difference]: Start difference. First operand 203 states and 303 transitions. Second operand 3 states. [2020-12-22 08:28:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:44,493 INFO L93 Difference]: Finished difference Result 507 states and 787 transitions. [2020-12-22 08:28:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:44,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:28:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:44,497 INFO L225 Difference]: With dead ends: 507 [2020-12-22 08:28:44,498 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 08:28:44,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 08:28:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2020-12-22 08:28:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-22 08:28:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 516 transitions. [2020-12-22 08:28:44,567 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 516 transitions. Word has length 61 [2020-12-22 08:28:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:44,568 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 516 transitions. [2020-12-22 08:28:44,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 516 transitions. [2020-12-22 08:28:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:28:44,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:44,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:44,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:28:44,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash 175155952, now seen corresponding path program 1 times [2020-12-22 08:28:44,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:44,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008803090] [2020-12-22 08:28:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:44,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008803090] [2020-12-22 08:28:44,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:44,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:44,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783683730] [2020-12-22 08:28:44,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:44,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:44,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,690 INFO L87 Difference]: Start difference. First operand 337 states and 516 transitions. Second operand 3 states. [2020-12-22 08:28:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:44,761 INFO L93 Difference]: Finished difference Result 877 states and 1374 transitions. [2020-12-22 08:28:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:44,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:28:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:44,766 INFO L225 Difference]: With dead ends: 877 [2020-12-22 08:28:44,766 INFO L226 Difference]: Without dead ends: 575 [2020-12-22 08:28:44,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-12-22 08:28:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 573. [2020-12-22 08:28:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-12-22 08:28:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 888 transitions. [2020-12-22 08:28:44,826 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 888 transitions. Word has length 62 [2020-12-22 08:28:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:44,827 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 888 transitions. [2020-12-22 08:28:44,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 888 transitions. [2020-12-22 08:28:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:28:44,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:44,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:44,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:28:44,830 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -546721508, now seen corresponding path program 1 times [2020-12-22 08:28:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:44,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619560180] [2020-12-22 08:28:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:44,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619560180] [2020-12-22 08:28:44,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:44,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:44,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231709895] [2020-12-22 08:28:44,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:44,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:44,966 INFO L87 Difference]: Start difference. First operand 573 states and 888 transitions. Second operand 3 states. [2020-12-22 08:28:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:45,059 INFO L93 Difference]: Finished difference Result 1521 states and 2386 transitions. [2020-12-22 08:28:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:45,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:28:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:45,067 INFO L225 Difference]: With dead ends: 1521 [2020-12-22 08:28:45,067 INFO L226 Difference]: Without dead ends: 983 [2020-12-22 08:28:45,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-12-22 08:28:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2020-12-22 08:28:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-12-22 08:28:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1524 transitions. [2020-12-22 08:28:45,138 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1524 transitions. Word has length 63 [2020-12-22 08:28:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:45,139 INFO L481 AbstractCegarLoop]: Abstraction has 981 states and 1524 transitions. [2020-12-22 08:28:45,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1524 transitions. [2020-12-22 08:28:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:28:45,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:45,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:45,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:28:45,142 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -8861705, now seen corresponding path program 1 times [2020-12-22 08:28:45,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:45,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074547921] [2020-12-22 08:28:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:45,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074547921] [2020-12-22 08:28:45,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:45,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:28:45,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783529795] [2020-12-22 08:28:45,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:28:45,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:28:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:45,394 INFO L87 Difference]: Start difference. First operand 981 states and 1524 transitions. Second operand 7 states. [2020-12-22 08:28:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:45,871 INFO L93 Difference]: Finished difference Result 5071 states and 7913 transitions. [2020-12-22 08:28:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:28:45,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 08:28:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:45,899 INFO L225 Difference]: With dead ends: 5071 [2020-12-22 08:28:45,899 INFO L226 Difference]: Without dead ends: 4125 [2020-12-22 08:28:45,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2020-12-22 08:28:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 4117. [2020-12-22 08:28:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4117 states. [2020-12-22 08:28:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 6404 transitions. [2020-12-22 08:28:46,348 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 6404 transitions. Word has length 64 [2020-12-22 08:28:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 4117 states and 6404 transitions. [2020-12-22 08:28:46,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:28:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 6404 transitions. [2020-12-22 08:28:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:28:46,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:46,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:46,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:28:46,352 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash -795974674, now seen corresponding path program 1 times [2020-12-22 08:28:46,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:46,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528192791] [2020-12-22 08:28:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:46,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528192791] [2020-12-22 08:28:46,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:46,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:28:46,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162154884] [2020-12-22 08:28:46,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:28:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:28:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:46,412 INFO L87 Difference]: Start difference. First operand 4117 states and 6404 transitions. Second operand 3 states. [2020-12-22 08:28:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:46,953 INFO L93 Difference]: Finished difference Result 11401 states and 17702 transitions. [2020-12-22 08:28:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:28:46,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:28:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:46,997 INFO L225 Difference]: With dead ends: 11401 [2020-12-22 08:28:46,997 INFO L226 Difference]: Without dead ends: 7319 [2020-12-22 08:28:47,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:28:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2020-12-22 08:28:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 7317. [2020-12-22 08:28:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7317 states. [2020-12-22 08:28:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 11252 transitions. [2020-12-22 08:28:47,666 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 11252 transitions. Word has length 64 [2020-12-22 08:28:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:47,668 INFO L481 AbstractCegarLoop]: Abstraction has 7317 states and 11252 transitions. [2020-12-22 08:28:47,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:28:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 11252 transitions. [2020-12-22 08:28:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:28:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:47,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:47,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:28:47,672 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash -722393440, now seen corresponding path program 1 times [2020-12-22 08:28:47,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:47,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919622357] [2020-12-22 08:28:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919622357] [2020-12-22 08:28:47,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:28:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142138415] [2020-12-22 08:28:47,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:28:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:28:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:28:47,848 INFO L87 Difference]: Start difference. First operand 7317 states and 11252 transitions. Second operand 6 states. [2020-12-22 08:28:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:49,548 INFO L93 Difference]: Finished difference Result 28715 states and 44135 transitions. [2020-12-22 08:28:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:28:49,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:28:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:49,655 INFO L225 Difference]: With dead ends: 28715 [2020-12-22 08:28:49,656 INFO L226 Difference]: Without dead ends: 21433 [2020-12-22 08:28:49,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:28:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21433 states. [2020-12-22 08:28:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21433 to 21429. [2020-12-22 08:28:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21429 states. [2020-12-22 08:28:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21429 states to 21429 states and 32788 transitions. [2020-12-22 08:28:51,477 INFO L78 Accepts]: Start accepts. Automaton has 21429 states and 32788 transitions. Word has length 66 [2020-12-22 08:28:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:51,477 INFO L481 AbstractCegarLoop]: Abstraction has 21429 states and 32788 transitions. [2020-12-22 08:28:51,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:28:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21429 states and 32788 transitions. [2020-12-22 08:28:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:28:51,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:51,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:28:51,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:28:51,479 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1219486907, now seen corresponding path program 1 times [2020-12-22 08:28:51,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:51,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353759688] [2020-12-22 08:28:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:51,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353759688] [2020-12-22 08:28:51,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:51,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:28:51,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139072260] [2020-12-22 08:28:51,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:28:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:28:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:28:51,599 INFO L87 Difference]: Start difference. First operand 21429 states and 32788 transitions. Second operand 7 states. [2020-12-22 08:28:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:55,944 INFO L93 Difference]: Finished difference Result 109265 states and 167338 transitions. [2020-12-22 08:28:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:28:55,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 08:28:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:56,245 INFO L225 Difference]: With dead ends: 109265 [2020-12-22 08:28:56,246 INFO L226 Difference]: Without dead ends: 87871 [2020-12-22 08:28:56,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:28:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87871 states. [2020-12-22 08:29:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87871 to 42821. [2020-12-22 08:29:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42821 states. [2020-12-22 08:29:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42821 states to 42821 states and 64580 transitions. [2020-12-22 08:29:00,260 INFO L78 Accepts]: Start accepts. Automaton has 42821 states and 64580 transitions. Word has length 66 [2020-12-22 08:29:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:00,261 INFO L481 AbstractCegarLoop]: Abstraction has 42821 states and 64580 transitions. [2020-12-22 08:29:00,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:29:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 42821 states and 64580 transitions. [2020-12-22 08:29:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:29:00,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:00,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:00,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:29:00,263 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash 831155307, now seen corresponding path program 1 times [2020-12-22 08:29:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:00,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052659823] [2020-12-22 08:29:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:00,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052659823] [2020-12-22 08:29:00,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:00,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:29:00,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122855247] [2020-12-22 08:29:00,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:29:00,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:29:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:29:00,377 INFO L87 Difference]: Start difference. First operand 42821 states and 64580 transitions. Second operand 5 states. [2020-12-22 08:29:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:05,306 INFO L93 Difference]: Finished difference Result 87527 states and 131045 transitions. [2020-12-22 08:29:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:29:05,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:29:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:05,471 INFO L225 Difference]: With dead ends: 87527 [2020-12-22 08:29:05,471 INFO L226 Difference]: Without dead ends: 87525 [2020-12-22 08:29:05,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:29:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87525 states. [2020-12-22 08:29:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87525 to 44741. [2020-12-22 08:29:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44741 states. [2020-12-22 08:29:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44741 states to 44741 states and 66500 transitions. [2020-12-22 08:29:09,026 INFO L78 Accepts]: Start accepts. Automaton has 44741 states and 66500 transitions. Word has length 67 [2020-12-22 08:29:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:09,027 INFO L481 AbstractCegarLoop]: Abstraction has 44741 states and 66500 transitions. [2020-12-22 08:29:09,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:29:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44741 states and 66500 transitions. [2020-12-22 08:29:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:29:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:09,028 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 08:29:09,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:29:09,028 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 6583829, now seen corresponding path program 1 times [2020-12-22 08:29:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:09,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9437793] [2020-12-22 08:29:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:09,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9437793] [2020-12-22 08:29:09,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:29:09,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:29:09,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976794657] [2020-12-22 08:29:09,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:29:09,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:29:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:29:09,093 INFO L87 Difference]: Start difference. First operand 44741 states and 66500 transitions. Second operand 3 states. [2020-12-22 08:29:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:29:13,221 INFO L93 Difference]: Finished difference Result 109059 states and 162000 transitions. [2020-12-22 08:29:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:29:13,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:29:13,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:29:13,332 INFO L225 Difference]: With dead ends: 109059 [2020-12-22 08:29:13,333 INFO L226 Difference]: Without dead ends: 64353 [2020-12-22 08:29:13,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:29:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64353 states. [2020-12-22 08:29:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64353 to 64351. [2020-12-22 08:29:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64351 states. [2020-12-22 08:29:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64351 states to 64351 states and 95102 transitions. [2020-12-22 08:29:17,967 INFO L78 Accepts]: Start accepts. Automaton has 64351 states and 95102 transitions. Word has length 68 [2020-12-22 08:29:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:29:17,967 INFO L481 AbstractCegarLoop]: Abstraction has 64351 states and 95102 transitions. [2020-12-22 08:29:17,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:29:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 64351 states and 95102 transitions. [2020-12-22 08:29:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:29:17,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:29:17,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:29:17,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:29:17,990 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:29:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:29:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -83102152, now seen corresponding path program 1 times [2020-12-22 08:29:17,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:29:17,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554670295] [2020-12-22 08:29:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:29:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:29:18,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554670295] [2020-12-22 08:29:18,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588589783] [2020-12-22 08:29:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:29:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:29:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 08:29:18,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:29:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:29:18,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:29:18,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2020-12-22 08:29:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197359452] [2020-12-22 08:29:18,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:29:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:29:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:29:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:29:18,669 INFO L87 Difference]: Start difference. First operand 64351 states and 95102 transitions. Second operand 13 states. [2020-12-22 08:30:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:30:13,423 INFO L93 Difference]: Finished difference Result 618288 states and 908521 transitions. [2020-12-22 08:30:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-12-22 08:30:13,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-12-22 08:30:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:30:15,063 INFO L225 Difference]: With dead ends: 618288 [2020-12-22 08:30:15,063 INFO L226 Difference]: Without dead ends: 557246 [2020-12-22 08:30:15,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12535 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3858, Invalid=23864, Unknown=0, NotChecked=0, Total=27722 [2020-12-22 08:30:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557246 states. [2020-12-22 08:30:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557246 to 185471. [2020-12-22 08:30:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185471 states. [2020-12-22 08:30:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185471 states to 185471 states and 271894 transitions. [2020-12-22 08:30:36,345 INFO L78 Accepts]: Start accepts. Automaton has 185471 states and 271894 transitions. Word has length 93 [2020-12-22 08:30:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:30:36,346 INFO L481 AbstractCegarLoop]: Abstraction has 185471 states and 271894 transitions. [2020-12-22 08:30:36,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:30:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 185471 states and 271894 transitions. [2020-12-22 08:30:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:30:36,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:30:36,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:30:36,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 08:30:36,596 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:30:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:30:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 396556083, now seen corresponding path program 1 times [2020-12-22 08:30:36,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:30:36,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223671115] [2020-12-22 08:30:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:30:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:30:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:30:36,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223671115] [2020-12-22 08:30:36,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:30:36,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:30:36,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028846344] [2020-12-22 08:30:36,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:30:36,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:30:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:30:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:30:36,676 INFO L87 Difference]: Start difference. First operand 185471 states and 271894 transitions. Second operand 3 states. [2020-12-22 08:31:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:00,637 INFO L93 Difference]: Finished difference Result 400446 states and 586510 transitions. [2020-12-22 08:31:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:31:00,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:31:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:01,166 INFO L225 Difference]: With dead ends: 400446 [2020-12-22 08:31:01,167 INFO L226 Difference]: Without dead ends: 275756 [2020-12-22 08:31:01,300 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 08:31:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275756 states.