/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_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:28:37,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:28:37,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:28:37,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:28:37,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:28:37,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:28:37,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:28:37,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:28:37,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:28:37,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:28:37,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:28:37,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:28:37,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:28:37,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:28:37,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:28:37,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:28:37,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:28:37,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:28:37,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:28:37,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:28:37,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:28:37,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:28:37,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:28:37,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:28:37,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:28:37,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:28:37,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:28:37,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:28:37,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:28:37,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:28:37,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:28:37,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:28:37,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:28:37,573 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:28:37,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:28:37,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:28:37,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:28:37,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:28:37,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:28:37,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:28:37,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:28:37,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:28:37,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:28:37,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:28:37,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:28:37,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:28:37,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:28:37,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:28:37,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:28:37,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:28:37,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:28:37,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:28:37,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:28:37,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:28:37,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:28:37,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:28:38,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:28:38,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:28:38,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:28:38,032 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:28:38,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:28:38,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0a90230/87309f4c131b43f283c753561c10737c/FLAG0de49828d [2020-12-22 07:28:38,821 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:28:38,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:28:38,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0a90230/87309f4c131b43f283c753561c10737c/FLAG0de49828d [2020-12-22 07:28:39,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0a90230/87309f4c131b43f283c753561c10737c [2020-12-22 07:28:39,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:28:39,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:28:39,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:28:39,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:28:39,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:28:39,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64627cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39, skipping insertion in model container [2020-12-22 07:28:39,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:28:39,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:28:39,466 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_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c[12792,12805] [2020-12-22 07:28:39,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:28:39,494 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:28:39,605 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_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c[12792,12805] [2020-12-22 07:28:39,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:28:39,626 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:28:39,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39 WrapperNode [2020-12-22 07:28:39,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:28:39,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:28:39,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:28:39,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:28:39,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:28:39,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:28:39,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:28:39,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:28:39,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (1/1) ... [2020-12-22 07:28:39,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:28:39,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:28:39,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:28:39,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:28:39,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (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 07:28:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:28:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:28:39,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:28:39,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:28:40,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:28:40,794 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:28:40,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:28:40 BoogieIcfgContainer [2020-12-22 07:28:40,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:28:40,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:28:40,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:28:40,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:28:40,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:28:39" (1/3) ... [2020-12-22 07:28:40,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4186a11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:28:40, skipping insertion in model container [2020-12-22 07:28:40,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:28:39" (2/3) ... [2020-12-22 07:28:40,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4186a11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:28:40, skipping insertion in model container [2020-12-22 07:28:40,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:28:40" (3/3) ... [2020-12-22 07:28:40,806 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c [2020-12-22 07:28:40,812 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:28:40,817 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:28:40,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:28:40,862 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:28:40,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:28:40,862 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:28:40,862 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:28:40,862 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:28:40,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:28:40,863 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:28:40,863 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:28:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-12-22 07:28:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:28:40,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:40,894 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] [2020-12-22 07:28:40,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash 563549969, now seen corresponding path program 1 times [2020-12-22 07:28:40,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:40,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170675236] [2020-12-22 07:28:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:41,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170675236] [2020-12-22 07:28:41,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:41,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:28:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974152866] [2020-12-22 07:28:41,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:28:41,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:28:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:28:41,268 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 2 states. [2020-12-22 07:28:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:41,298 INFO L93 Difference]: Finished difference Result 207 states and 340 transitions. [2020-12-22 07:28:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:28:41,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-12-22 07:28:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:41,312 INFO L225 Difference]: With dead ends: 207 [2020-12-22 07:28:41,312 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 07:28:41,316 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 07:28:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 07:28:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-22 07:28:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 07:28:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 198 transitions. [2020-12-22 07:28:41,363 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 198 transitions. Word has length 33 [2020-12-22 07:28:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:41,364 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 198 transitions. [2020-12-22 07:28:41,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:28:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 198 transitions. [2020-12-22 07:28:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:28:41,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:41,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:41,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:28:41,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash 54076879, now seen corresponding path program 1 times [2020-12-22 07:28:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:41,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935742416] [2020-12-22 07:28:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:41,520 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 07:28:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935742416] [2020-12-22 07:28:41,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:41,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:28:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76467891] [2020-12-22 07:28:41,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:28:41,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:28:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:28:41,527 INFO L87 Difference]: Start difference. First operand 118 states and 198 transitions. Second operand 5 states. [2020-12-22 07:28:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:41,676 INFO L93 Difference]: Finished difference Result 202 states and 330 transitions. [2020-12-22 07:28:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:28:41,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 07:28:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:41,681 INFO L225 Difference]: With dead ends: 202 [2020-12-22 07:28:41,682 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 07:28:41,685 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 07:28:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 07:28:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-22 07:28:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 07:28:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2020-12-22 07:28:41,707 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 33 [2020-12-22 07:28:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:41,707 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2020-12-22 07:28:41,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:28:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2020-12-22 07:28:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:28:41,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:41,717 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 07:28:41,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:28:41,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1850253404, now seen corresponding path program 1 times [2020-12-22 07:28:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:41,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919364713] [2020-12-22 07:28:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:41,916 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 07:28:41,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919364713] [2020-12-22 07:28:41,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:41,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:41,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093690291] [2020-12-22 07:28:41,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:41,920 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 3 states. [2020-12-22 07:28:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:41,943 INFO L93 Difference]: Finished difference Result 266 states and 402 transitions. [2020-12-22 07:28:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:41,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:28:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:41,946 INFO L225 Difference]: With dead ends: 266 [2020-12-22 07:28:41,946 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 07:28:41,947 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 07:28:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 07:28:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-12-22 07:28:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 07:28:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2020-12-22 07:28:41,963 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 64 [2020-12-22 07:28:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:41,964 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2020-12-22 07:28:41,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2020-12-22 07:28:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:28:41,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:41,967 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] [2020-12-22 07:28:41,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:28:41,967 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1736606100, now seen corresponding path program 1 times [2020-12-22 07:28:41,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:41,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720334750] [2020-12-22 07:28:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:42,142 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 07:28:42,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720334750] [2020-12-22 07:28:42,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:42,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172102466] [2020-12-22 07:28:42,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:42,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:42,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:42,146 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand 3 states. [2020-12-22 07:28:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:42,172 INFO L93 Difference]: Finished difference Result 452 states and 700 transitions. [2020-12-22 07:28:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:42,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:28:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:42,176 INFO L225 Difference]: With dead ends: 452 [2020-12-22 07:28:42,176 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 07:28:42,177 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 07:28:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 07:28:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-12-22 07:28:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-22 07:28:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 463 transitions. [2020-12-22 07:28:42,218 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 463 transitions. Word has length 65 [2020-12-22 07:28:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:42,218 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 463 transitions. [2020-12-22 07:28:42,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 463 transitions. [2020-12-22 07:28:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:28:42,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:42,221 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 07:28:42,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:28:42,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 245456436, now seen corresponding path program 1 times [2020-12-22 07:28:42,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:42,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653571106] [2020-12-22 07:28:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:42,339 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 07:28:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653571106] [2020-12-22 07:28:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:42,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407585810] [2020-12-22 07:28:42,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:42,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:42,342 INFO L87 Difference]: Start difference. First operand 304 states and 463 transitions. Second operand 3 states. [2020-12-22 07:28:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:42,427 INFO L93 Difference]: Finished difference Result 788 states and 1233 transitions. [2020-12-22 07:28:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:42,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:28:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:42,433 INFO L225 Difference]: With dead ends: 788 [2020-12-22 07:28:42,433 INFO L226 Difference]: Without dead ends: 522 [2020-12-22 07:28:42,435 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 07:28:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-22 07:28:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 520. [2020-12-22 07:28:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-22 07:28:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 803 transitions. [2020-12-22 07:28:42,486 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 803 transitions. Word has length 66 [2020-12-22 07:28:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:42,489 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 803 transitions. [2020-12-22 07:28:42,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 803 transitions. [2020-12-22 07:28:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:28:42,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:42,493 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 07:28:42,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:28:42,494 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2021301796, now seen corresponding path program 1 times [2020-12-22 07:28:42,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:42,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386087064] [2020-12-22 07:28:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:42,592 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 07:28:42,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386087064] [2020-12-22 07:28:42,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:42,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462511049] [2020-12-22 07:28:42,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:42,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:42,597 INFO L87 Difference]: Start difference. First operand 520 states and 803 transitions. Second operand 3 states. [2020-12-22 07:28:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:42,646 INFO L93 Difference]: Finished difference Result 1388 states and 2173 transitions. [2020-12-22 07:28:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:42,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:28:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:42,652 INFO L225 Difference]: With dead ends: 1388 [2020-12-22 07:28:42,652 INFO L226 Difference]: Without dead ends: 906 [2020-12-22 07:28:42,654 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 07:28:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-12-22 07:28:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2020-12-22 07:28:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-12-22 07:28:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1399 transitions. [2020-12-22 07:28:42,693 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1399 transitions. Word has length 67 [2020-12-22 07:28:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:42,694 INFO L481 AbstractCegarLoop]: Abstraction has 904 states and 1399 transitions. [2020-12-22 07:28:42,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1399 transitions. [2020-12-22 07:28:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:28:42,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:42,695 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 07:28:42,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:28:42,696 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1960792892, now seen corresponding path program 1 times [2020-12-22 07:28:42,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:42,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249863790] [2020-12-22 07:28:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:42,782 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 07:28:42,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249863790] [2020-12-22 07:28:42,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:42,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491940854] [2020-12-22 07:28:42,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:42,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:42,786 INFO L87 Difference]: Start difference. First operand 904 states and 1399 transitions. Second operand 3 states. [2020-12-22 07:28:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:42,841 INFO L93 Difference]: Finished difference Result 2444 states and 3801 transitions. [2020-12-22 07:28:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:42,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:28:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:42,853 INFO L225 Difference]: With dead ends: 2444 [2020-12-22 07:28:42,853 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 07:28:42,856 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 07:28:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 07:28:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1576. [2020-12-22 07:28:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1576 states. [2020-12-22 07:28:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2423 transitions. [2020-12-22 07:28:42,911 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2423 transitions. Word has length 68 [2020-12-22 07:28:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:42,913 INFO L481 AbstractCegarLoop]: Abstraction has 1576 states and 2423 transitions. [2020-12-22 07:28:42,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2423 transitions. [2020-12-22 07:28:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:28:42,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:42,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:42,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:28:42,915 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1083012428, now seen corresponding path program 1 times [2020-12-22 07:28:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:42,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858702710] [2020-12-22 07:28:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:43,137 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 07:28:43,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858702710] [2020-12-22 07:28:43,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:43,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:28:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585721975] [2020-12-22 07:28:43,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:43,140 INFO L87 Difference]: Start difference. First operand 1576 states and 2423 transitions. Second operand 7 states. [2020-12-22 07:28:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:43,525 INFO L93 Difference]: Finished difference Result 8386 states and 12828 transitions. [2020-12-22 07:28:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:28:43,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 07:28:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:43,561 INFO L225 Difference]: With dead ends: 8386 [2020-12-22 07:28:43,562 INFO L226 Difference]: Without dead ends: 6848 [2020-12-22 07:28:43,567 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 07:28:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2020-12-22 07:28:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6840. [2020-12-22 07:28:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6840 states. [2020-12-22 07:28:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 10407 transitions. [2020-12-22 07:28:43,947 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 10407 transitions. Word has length 69 [2020-12-22 07:28:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:43,947 INFO L481 AbstractCegarLoop]: Abstraction has 6840 states and 10407 transitions. [2020-12-22 07:28:43,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:28:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 10407 transitions. [2020-12-22 07:28:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:28:43,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:43,949 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 07:28:43,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:28:43,949 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1552148145, now seen corresponding path program 1 times [2020-12-22 07:28:43,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:43,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277844523] [2020-12-22 07:28:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:44,113 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 07:28:44,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277844523] [2020-12-22 07:28:44,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:44,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:28:44,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402003182] [2020-12-22 07:28:44,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:44,122 INFO L87 Difference]: Start difference. First operand 6840 states and 10407 transitions. Second operand 7 states. [2020-12-22 07:28:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:45,420 INFO L93 Difference]: Finished difference Result 34692 states and 52941 transitions. [2020-12-22 07:28:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:28:45,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-12-22 07:28:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:45,545 INFO L225 Difference]: With dead ends: 34692 [2020-12-22 07:28:45,546 INFO L226 Difference]: Without dead ends: 27890 [2020-12-22 07:28:45,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:28:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27890 states. [2020-12-22 07:28:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27890 to 13640. [2020-12-22 07:28:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13640 states. [2020-12-22 07:28:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 20455 transitions. [2020-12-22 07:28:46,570 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 20455 transitions. Word has length 70 [2020-12-22 07:28:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:46,570 INFO L481 AbstractCegarLoop]: Abstraction has 13640 states and 20455 transitions. [2020-12-22 07:28:46,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:28:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 20455 transitions. [2020-12-22 07:28:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:28:46,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:46,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:46,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:28:46,572 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:46,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1255275453, now seen corresponding path program 1 times [2020-12-22 07:28:46,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:46,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771154557] [2020-12-22 07:28:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:46,730 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 07:28:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771154557] [2020-12-22 07:28:46,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:46,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:28:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155671335] [2020-12-22 07:28:46,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:28:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:28:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:28:46,734 INFO L87 Difference]: Start difference. First operand 13640 states and 20455 transitions. Second operand 8 states. [2020-12-22 07:28:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:48,294 INFO L93 Difference]: Finished difference Result 28522 states and 42152 transitions. [2020-12-22 07:28:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:28:48,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-12-22 07:28:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:48,362 INFO L225 Difference]: With dead ends: 28522 [2020-12-22 07:28:48,362 INFO L226 Difference]: Without dead ends: 28520 [2020-12-22 07:28:48,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:28:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28520 states. [2020-12-22 07:28:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28520 to 14600. [2020-12-22 07:28:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-12-22 07:28:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 21415 transitions. [2020-12-22 07:28:49,473 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 21415 transitions. Word has length 71 [2020-12-22 07:28:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:49,473 INFO L481 AbstractCegarLoop]: Abstraction has 14600 states and 21415 transitions. [2020-12-22 07:28:49,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:28:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 21415 transitions. [2020-12-22 07:28:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:28:49,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:49,475 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 07:28:49,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:28:49,476 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -206254681, now seen corresponding path program 1 times [2020-12-22 07:28:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:49,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538141360] [2020-12-22 07:28:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:49,542 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 07:28:49,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538141360] [2020-12-22 07:28:49,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:49,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422695024] [2020-12-22 07:28:49,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:49,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:49,547 INFO L87 Difference]: Start difference. First operand 14600 states and 21415 transitions. Second operand 3 states. [2020-12-22 07:28:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:50,572 INFO L93 Difference]: Finished difference Result 35518 states and 52155 transitions. [2020-12-22 07:28:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:50,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:28:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:50,619 INFO L225 Difference]: With dead ends: 35518 [2020-12-22 07:28:50,619 INFO L226 Difference]: Without dead ends: 20956 [2020-12-22 07:28:50,641 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 07:28:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20956 states. [2020-12-22 07:28:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20956 to 20954. [2020-12-22 07:28:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20954 states. [2020-12-22 07:28:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 30633 transitions. [2020-12-22 07:28:51,721 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 30633 transitions. Word has length 72 [2020-12-22 07:28:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:51,721 INFO L481 AbstractCegarLoop]: Abstraction has 20954 states and 30633 transitions. [2020-12-22 07:28:51,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 30633 transitions. [2020-12-22 07:28:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:28:51,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:51,733 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:51,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:28:51,734 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:51,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1745394696, now seen corresponding path program 1 times [2020-12-22 07:28:51,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:51,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044657508] [2020-12-22 07:28:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:28:51,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044657508] [2020-12-22 07:28:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761535727] [2020-12-22 07:28:51,937 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 07:28:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:28:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:28:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:28:52,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:28:52,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 07:28:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6666437] [2020-12-22 07:28:52,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:52,555 INFO L87 Difference]: Start difference. First operand 20954 states and 30633 transitions. Second operand 7 states. [2020-12-22 07:28:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:54,603 INFO L93 Difference]: Finished difference Result 51799 states and 76018 transitions. [2020-12-22 07:28:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:54,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-12-22 07:28:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:54,678 INFO L225 Difference]: With dead ends: 51799 [2020-12-22 07:28:54,678 INFO L226 Difference]: Without dead ends: 37237 [2020-12-22 07:28:54,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:28:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37237 states. [2020-12-22 07:28:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37237 to 34650. [2020-12-22 07:28:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34650 states. [2020-12-22 07:28:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 50441 transitions. [2020-12-22 07:28:56,744 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 50441 transitions. Word has length 99 [2020-12-22 07:28:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:56,744 INFO L481 AbstractCegarLoop]: Abstraction has 34650 states and 50441 transitions. [2020-12-22 07:28:56,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:28:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 50441 transitions. [2020-12-22 07:28:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:28:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:56,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:56,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:28:56,972 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -152615028, now seen corresponding path program 1 times [2020-12-22 07:28:56,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:56,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375243745] [2020-12-22 07:28:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:28:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375243745] [2020-12-22 07:28:57,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:57,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:28:57,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050702249] [2020-12-22 07:28:57,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:57,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:57,204 INFO L87 Difference]: Start difference. First operand 34650 states and 50441 transitions. Second operand 7 states. [2020-12-22 07:28:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:59,876 INFO L93 Difference]: Finished difference Result 80006 states and 117295 transitions. [2020-12-22 07:28:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:28:59,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:28:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:00,015 INFO L225 Difference]: With dead ends: 80006 [2020-12-22 07:29:00,016 INFO L226 Difference]: Without dead ends: 68628 [2020-12-22 07:29:00,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 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 07:29:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68628 states. [2020-12-22 07:29:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68628 to 45690. [2020-12-22 07:29:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45690 states. [2020-12-22 07:29:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45690 states to 45690 states and 66377 transitions. [2020-12-22 07:29:02,645 INFO L78 Accepts]: Start accepts. Automaton has 45690 states and 66377 transitions. Word has length 100 [2020-12-22 07:29:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:02,645 INFO L481 AbstractCegarLoop]: Abstraction has 45690 states and 66377 transitions. [2020-12-22 07:29:02,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:29:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45690 states and 66377 transitions. [2020-12-22 07:29:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:29:02,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:02,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:02,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:29:02,658 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 589805596, now seen corresponding path program 1 times [2020-12-22 07:29:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:02,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512012498] [2020-12-22 07:29:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512012498] [2020-12-22 07:29:02,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:02,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648047815] [2020-12-22 07:29:02,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:02,735 INFO L87 Difference]: Start difference. First operand 45690 states and 66377 transitions. Second operand 3 states. [2020-12-22 07:29:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:05,860 INFO L93 Difference]: Finished difference Result 117117 states and 170013 transitions. [2020-12-22 07:29:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:05,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:29:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:05,973 INFO L225 Difference]: With dead ends: 117117 [2020-12-22 07:29:05,973 INFO L226 Difference]: Without dead ends: 77051 [2020-12-22 07:29:06,012 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 07:29:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77051 states. [2020-12-22 07:29:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77051 to 74825. [2020-12-22 07:29:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74825 states. [2020-12-22 07:29:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74825 states to 74825 states and 107643 transitions. [2020-12-22 07:29:09,846 INFO L78 Accepts]: Start accepts. Automaton has 74825 states and 107643 transitions. Word has length 100 [2020-12-22 07:29:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:09,846 INFO L481 AbstractCegarLoop]: Abstraction has 74825 states and 107643 transitions. [2020-12-22 07:29:09,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74825 states and 107643 transitions. [2020-12-22 07:29:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:29:09,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:09,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:09,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:29:09,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -912723652, now seen corresponding path program 1 times [2020-12-22 07:29:09,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:09,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032854268] [2020-12-22 07:29:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:09,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032854268] [2020-12-22 07:29:09,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:09,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:09,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276714540] [2020-12-22 07:29:09,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:09,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:09,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:09,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:09,929 INFO L87 Difference]: Start difference. First operand 74825 states and 107643 transitions. Second operand 3 states. [2020-12-22 07:29:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:14,576 INFO L93 Difference]: Finished difference Result 144938 states and 208407 transitions. [2020-12-22 07:29:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:14,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:29:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:14,722 INFO L225 Difference]: With dead ends: 144938 [2020-12-22 07:29:14,723 INFO L226 Difference]: Without dead ends: 104648 [2020-12-22 07:29:14,762 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 07:29:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104648 states. [2020-12-22 07:29:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104648 to 96478. [2020-12-22 07:29:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96478 states. [2020-12-22 07:29:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96478 states to 96478 states and 137349 transitions. [2020-12-22 07:29:19,714 INFO L78 Accepts]: Start accepts. Automaton has 96478 states and 137349 transitions. Word has length 100 [2020-12-22 07:29:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:19,714 INFO L481 AbstractCegarLoop]: Abstraction has 96478 states and 137349 transitions. [2020-12-22 07:29:19,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 96478 states and 137349 transitions. [2020-12-22 07:29:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:29:19,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:19,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:19,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:29:19,743 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash -485377588, now seen corresponding path program 1 times [2020-12-22 07:29:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:19,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366125875] [2020-12-22 07:29:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366125875] [2020-12-22 07:29:19,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:19,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818568422] [2020-12-22 07:29:19,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:19,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:19,803 INFO L87 Difference]: Start difference. First operand 96478 states and 137349 transitions. Second operand 3 states. [2020-12-22 07:29:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:24,630 INFO L93 Difference]: Finished difference Result 150973 states and 214009 transitions. [2020-12-22 07:29:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:24,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:29:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:24,777 INFO L225 Difference]: With dead ends: 150973 [2020-12-22 07:29:24,777 INFO L226 Difference]: Without dead ends: 101591 [2020-12-22 07:29:24,814 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 07:29:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101591 states. [2020-12-22 07:29:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101591 to 97340. [2020-12-22 07:29:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97340 states. [2020-12-22 07:29:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97340 states to 97340 states and 136276 transitions. [2020-12-22 07:29:29,452 INFO L78 Accepts]: Start accepts. Automaton has 97340 states and 136276 transitions. Word has length 100 [2020-12-22 07:29:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:29,453 INFO L481 AbstractCegarLoop]: Abstraction has 97340 states and 136276 transitions. [2020-12-22 07:29:29,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 97340 states and 136276 transitions. [2020-12-22 07:29:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:29:29,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:29,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:29,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:29:29,469 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 567734444, now seen corresponding path program 1 times [2020-12-22 07:29:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:29,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004927228] [2020-12-22 07:29:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004927228] [2020-12-22 07:29:29,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:29,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264960556] [2020-12-22 07:29:29,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:29,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:29,694 INFO L87 Difference]: Start difference. First operand 97340 states and 136276 transitions. Second operand 3 states. [2020-12-22 07:29:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:36,628 INFO L93 Difference]: Finished difference Result 239723 states and 335013 transitions. [2020-12-22 07:29:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:36,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:29:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:36,877 INFO L225 Difference]: With dead ends: 239723 [2020-12-22 07:29:36,877 INFO L226 Difference]: Without dead ends: 156669 [2020-12-22 07:29:36,928 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 07:29:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156669 states. [2020-12-22 07:29:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156669 to 155243. [2020-12-22 07:29:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155243 states. [2020-12-22 07:29:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155243 states to 155243 states and 214611 transitions. [2020-12-22 07:29:44,591 INFO L78 Accepts]: Start accepts. Automaton has 155243 states and 214611 transitions. Word has length 100 [2020-12-22 07:29:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:44,594 INFO L481 AbstractCegarLoop]: Abstraction has 155243 states and 214611 transitions. [2020-12-22 07:29:44,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:29:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 155243 states and 214611 transitions. [2020-12-22 07:29:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:29:44,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:44,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:44,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:29:44,622 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash -588156778, now seen corresponding path program 1 times [2020-12-22 07:29:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:44,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763295343] [2020-12-22 07:29:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:29:44,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763295343] [2020-12-22 07:29:44,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:44,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:29:44,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515921142] [2020-12-22 07:29:44,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:29:44,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:29:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:29:44,810 INFO L87 Difference]: Start difference. First operand 155243 states and 214611 transitions. Second operand 7 states. [2020-12-22 07:29:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:59,181 INFO L93 Difference]: Finished difference Result 360270 states and 503407 transitions. [2020-12-22 07:29:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:29:59,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:29:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:59,821 INFO L225 Difference]: With dead ends: 360270 [2020-12-22 07:29:59,822 INFO L226 Difference]: Without dead ends: 318214 [2020-12-22 07:29:59,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:30:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318214 states. [2020-12-22 07:30:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318214 to 195531. [2020-12-22 07:30:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195531 states. [2020-12-22 07:30:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195531 states to 195531 states and 270611 transitions. [2020-12-22 07:30:11,215 INFO L78 Accepts]: Start accepts. Automaton has 195531 states and 270611 transitions. Word has length 100 [2020-12-22 07:30:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:11,216 INFO L481 AbstractCegarLoop]: Abstraction has 195531 states and 270611 transitions. [2020-12-22 07:30:11,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 195531 states and 270611 transitions. [2020-12-22 07:30:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:30:11,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:11,545 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:11,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:30:11,546 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1877694796, now seen corresponding path program 1 times [2020-12-22 07:30:11,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:11,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197958825] [2020-12-22 07:30:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:30:11,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197958825] [2020-12-22 07:30:11,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:11,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:11,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367249919] [2020-12-22 07:30:11,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:11,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:11,688 INFO L87 Difference]: Start difference. First operand 195531 states and 270611 transitions. Second operand 7 states. [2020-12-22 07:30:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:29,999 INFO L93 Difference]: Finished difference Result 387166 states and 540476 transitions. [2020-12-22 07:30:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:30:30,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:30:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:30,733 INFO L225 Difference]: With dead ends: 387166 [2020-12-22 07:30:30,733 INFO L226 Difference]: Without dead ends: 359100 [2020-12-22 07:30:30,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:30:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359100 states. [2020-12-22 07:30:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359100 to 222443. [2020-12-22 07:30:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222443 states. [2020-12-22 07:30:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222443 states to 222443 states and 308115 transitions. [2020-12-22 07:30:44,953 INFO L78 Accepts]: Start accepts. Automaton has 222443 states and 308115 transitions. Word has length 100 [2020-12-22 07:30:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:44,953 INFO L481 AbstractCegarLoop]: Abstraction has 222443 states and 308115 transitions. [2020-12-22 07:30:44,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 222443 states and 308115 transitions. [2020-12-22 07:30:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:30:44,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:44,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:44,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:30:44,972 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash 170158188, now seen corresponding path program 1 times [2020-12-22 07:30:44,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:44,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397344459] [2020-12-22 07:30:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:30:45,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397344459] [2020-12-22 07:30:45,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:45,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120163895] [2020-12-22 07:30:45,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:45,107 INFO L87 Difference]: Start difference. First operand 222443 states and 308115 transitions. Second operand 7 states. [2020-12-22 07:31:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:08,879 INFO L93 Difference]: Finished difference Result 435753 states and 608458 transitions. [2020-12-22 07:31:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:31:08,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:31:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:09,495 INFO L225 Difference]: With dead ends: 435753 [2020-12-22 07:31:09,496 INFO L226 Difference]: Without dead ends: 384779 [2020-12-22 07:31:09,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:31:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384779 states. [2020-12-22 07:31:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384779 to 263435. [2020-12-22 07:31:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263435 states. [2020-12-22 07:31:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263435 states to 263435 states and 365083 transitions. [2020-12-22 07:31:27,290 INFO L78 Accepts]: Start accepts. Automaton has 263435 states and 365083 transitions. Word has length 100 [2020-12-22 07:31:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:27,290 INFO L481 AbstractCegarLoop]: Abstraction has 263435 states and 365083 transitions. [2020-12-22 07:31:27,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:31:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 263435 states and 365083 transitions. [2020-12-22 07:31:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:31:27,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:27,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:27,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:31:27,311 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash 250185526, now seen corresponding path program 1 times [2020-12-22 07:31:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:27,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368753119] [2020-12-22 07:31:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:31:27,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368753119] [2020-12-22 07:31:27,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:27,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:31:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862594045] [2020-12-22 07:31:27,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:31:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:31:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:27,502 INFO L87 Difference]: Start difference. First operand 263435 states and 365083 transitions. Second operand 7 states. [2020-12-22 07:31:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:53,322 INFO L93 Difference]: Finished difference Result 488325 states and 681259 transitions. [2020-12-22 07:31:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:31:53,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:31:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:54,147 INFO L225 Difference]: With dead ends: 488325 [2020-12-22 07:31:54,148 INFO L226 Difference]: Without dead ends: 432516 [2020-12-22 07:31:54,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 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 07:31:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432516 states. [2020-12-22 07:32:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432516 to 300616. [2020-12-22 07:32:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300616 states. [2020-12-22 07:32:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300616 states to 300616 states and 416778 transitions. [2020-12-22 07:32:14,643 INFO L78 Accepts]: Start accepts. Automaton has 300616 states and 416778 transitions. Word has length 100 [2020-12-22 07:32:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:14,644 INFO L481 AbstractCegarLoop]: Abstraction has 300616 states and 416778 transitions. [2020-12-22 07:32:14,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:32:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 300616 states and 416778 transitions. [2020-12-22 07:32:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 07:32:14,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:14,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:14,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:32:14,676 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2135373178, now seen corresponding path program 1 times [2020-12-22 07:32:14,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:14,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73829679] [2020-12-22 07:32:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:14,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73829679] [2020-12-22 07:32:14,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:14,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:14,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460592841] [2020-12-22 07:32:14,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:14,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:14,749 INFO L87 Difference]: Start difference. First operand 300616 states and 416778 transitions. Second operand 3 states.