/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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:22:31,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:22:31,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:22:31,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:22:31,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:22:31,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:22:31,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:22:31,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:22:31,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:22:32,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:22:32,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:22:32,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:22:32,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:22:32,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:22:32,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:22:32,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:22:32,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:22:32,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:22:32,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:22:32,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:22:32,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:22:32,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:22:32,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:22:32,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:22:32,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:22:32,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:22:32,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:22:32,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:22:32,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:22:32,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:22:32,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:22:32,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:22:32,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:22:32,122 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:22:32,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:22:32,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:22:32,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:22:32,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:22:32,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:22:32,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:22:32,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:22:32,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:22:32,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:22:32,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:22:32,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:22:32,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:22:32,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:22:32,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:22:32,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:22:32,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:22:32,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:22:32,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:22:32,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:22:32,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:22:32,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:22:32,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:22:32,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:22:32,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:22:32,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:22:32,575 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:22:32,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:22:32,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbe1e7c7/ff368a5c5d50411dad03a7ab60835b70/FLAGe4f5bf77a [2020-12-22 10:22:33,521 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:22:33,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:22:33,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbe1e7c7/ff368a5c5d50411dad03a7ab60835b70/FLAGe4f5bf77a [2020-12-22 10:22:34,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbe1e7c7/ff368a5c5d50411dad03a7ab60835b70 [2020-12-22 10:22:34,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:22:34,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:22:34,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:34,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:22:34,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:22:34,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:34" (1/1) ... [2020-12-22 10:22:34,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f44a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:34, skipping insertion in model container [2020-12-22 10:22:34,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:34" (1/1) ... [2020-12-22 10:22:34,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:22:34,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:22:34,658 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c[26847,26860] [2020-12-22 10:22:34,726 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c[33540,33553] [2020-12-22 10:22:35,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:35,743 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:22:35,834 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c[26847,26860] [2020-12-22 10:22:35,850 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c[33540,33553] [2020-12-22 10:22:36,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:36,484 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:22:36,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36 WrapperNode [2020-12-22 10:22:36,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:36,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:36,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:22:36,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:22:36,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:36,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:37,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:22:37,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:22:37,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:22:37,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (1/1) ... [2020-12-22 10:22:37,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:22:37,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:22:37,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:22:37,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:22:37,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (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 10:22:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:22:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:22:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:22:37,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:22:43,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:22:43,391 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:22:43,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:43 BoogieIcfgContainer [2020-12-22 10:22:43,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:22:43,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:22:43,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:22:43,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:22:43,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:22:34" (1/3) ... [2020-12-22 10:22:43,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c08a460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:43, skipping insertion in model container [2020-12-22 10:22:43,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:36" (2/3) ... [2020-12-22 10:22:43,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c08a460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:43, skipping insertion in model container [2020-12-22 10:22:43,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:43" (3/3) ... [2020-12-22 10:22:43,409 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label05.c [2020-12-22 10:22:43,416 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:22:43,423 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:22:43,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:22:43,496 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:22:43,496 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:22:43,496 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:22:43,496 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:22:43,496 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:22:43,497 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:22:43,497 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:22:43,497 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:22:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:22:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:22:43,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:43,556 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] [2020-12-22 10:22:43,556 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:22:43,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:43,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374225527] [2020-12-22 10:22:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:43,883 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 10:22:43,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374225527] [2020-12-22 10:22:43,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:43,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:22:43,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319659721] [2020-12-22 10:22:43,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:22:43,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:22:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:22:43,916 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:22:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,028 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:22:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:22:44,030 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:22:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,088 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:22:44,088 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:22:44,101 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 10:22:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:22:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:22:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:22:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:22:44,232 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:22:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:44,233 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:22:44,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:22:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:22:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:22:44,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:44,236 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] [2020-12-22 10:22:44,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:22:44,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:44,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:44,237 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:22:44,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:44,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885958345] [2020-12-22 10:22:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,424 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 10:22:44,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885958345] [2020-12-22 10:22:44,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:22:44,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057263840] [2020-12-22 10:22:44,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:22:44,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:22:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:44,430 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:22:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,678 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:22:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:22:44,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:22:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,685 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:22:44,685 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:22:44,687 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 10:22:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:22:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:22:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:22:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:22:44,713 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:22:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:44,713 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:22:44,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:22:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:22:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:22:44,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:44,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:44,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:22:44,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash 817411013, now seen corresponding path program 1 times [2020-12-22 10:22:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:44,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706535177] [2020-12-22 10:22:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:44,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706535177] [2020-12-22 10:22:44,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:44,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474857690] [2020-12-22 10:22:44,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:22:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:22:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:44,913 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:22:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:54,671 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:22:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:54,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:22:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:54,686 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:22:54,686 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:22:54,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:22:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:22:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:22:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3753 transitions. [2020-12-22 10:22:54,749 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3753 transitions. Word has length 60 [2020-12-22 10:22:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:54,749 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3753 transitions. [2020-12-22 10:22:54,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3753 transitions. [2020-12-22 10:22:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:54,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:54,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:54,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:22:54,753 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:22:54,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:54,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033274700] [2020-12-22 10:22:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:54,907 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 10:22:54,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033274700] [2020-12-22 10:22:54,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:54,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848282088] [2020-12-22 10:22:54,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:54,910 INFO L87 Difference]: Start difference. First operand 2399 states and 3753 transitions. Second operand 3 states. [2020-12-22 10:22:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:54,962 INFO L93 Difference]: Finished difference Result 2545 states and 3985 transitions. [2020-12-22 10:22:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:54,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:54,977 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:22:54,977 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:22:54,978 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 10:22:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:22:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:22:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:22:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3862 transitions. [2020-12-22 10:22:55,040 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3862 transitions. Word has length 106 [2020-12-22 10:22:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:55,041 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3862 transitions. [2020-12-22 10:22:55,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3862 transitions. [2020-12-22 10:22:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:55,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:55,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:55,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:22:55,044 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:22:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:55,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214993633] [2020-12-22 10:22:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:55,205 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 10:22:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214993633] [2020-12-22 10:22:55,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:55,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:55,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194884829] [2020-12-22 10:22:55,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:55,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:55,208 INFO L87 Difference]: Start difference. First operand 2467 states and 3862 transitions. Second operand 3 states. [2020-12-22 10:22:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:55,268 INFO L93 Difference]: Finished difference Result 2743 states and 4302 transitions. [2020-12-22 10:22:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:55,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:55,285 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:22:55,285 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:22:55,287 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 10:22:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:22:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:22:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:22:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4069 transitions. [2020-12-22 10:22:55,362 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4069 transitions. Word has length 106 [2020-12-22 10:22:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:55,363 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 4069 transitions. [2020-12-22 10:22:55,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4069 transitions. [2020-12-22 10:22:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:55,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:55,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:55,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:22:55,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:22:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:55,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622219953] [2020-12-22 10:22:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:55,596 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 10:22:55,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622219953] [2020-12-22 10:22:55,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:55,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:55,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533377870] [2020-12-22 10:22:55,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:55,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:55,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:55,599 INFO L87 Difference]: Start difference. First operand 2597 states and 4069 transitions. Second operand 3 states. [2020-12-22 10:22:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:55,671 INFO L93 Difference]: Finished difference Result 3121 states and 4903 transitions. [2020-12-22 10:22:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:55,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:55,691 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:22:55,692 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:22:55,696 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 10:22:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:22:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:22:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:22:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4461 transitions. [2020-12-22 10:22:55,798 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4461 transitions. Word has length 106 [2020-12-22 10:22:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:55,800 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4461 transitions. [2020-12-22 10:22:55,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4461 transitions. [2020-12-22 10:22:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:55,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:55,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:55,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:22:55,803 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:55,808 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:22:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:55,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028424148] [2020-12-22 10:22:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:55,973 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 10:22:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028424148] [2020-12-22 10:22:55,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:55,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75728069] [2020-12-22 10:22:55,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:55,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:55,977 INFO L87 Difference]: Start difference. First operand 2845 states and 4461 transitions. Second operand 3 states. [2020-12-22 10:22:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:56,049 INFO L93 Difference]: Finished difference Result 3841 states and 6039 transitions. [2020-12-22 10:22:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:56,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:56,069 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:22:56,070 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:22:56,073 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 10:22:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:22:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:22:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:22:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5201 transitions. [2020-12-22 10:22:56,178 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5201 transitions. Word has length 106 [2020-12-22 10:22:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:56,179 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5201 transitions. [2020-12-22 10:22:56,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5201 transitions. [2020-12-22 10:22:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:56,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:56,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:56,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:22:56,181 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:22:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:56,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496788925] [2020-12-22 10:22:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:56,382 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 10:22:56,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496788925] [2020-12-22 10:22:56,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460581391] [2020-12-22 10:22:56,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:56,384 INFO L87 Difference]: Start difference. First operand 3317 states and 5201 transitions. Second operand 10 states. [2020-12-22 10:22:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:57,544 INFO L93 Difference]: Finished difference Result 19221 states and 30305 transitions. [2020-12-22 10:22:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:22:57,545 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:22:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:57,618 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:22:57,618 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:22:57,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:22:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:22:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:22:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:22:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6737 transitions. [2020-12-22 10:22:58,009 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6737 transitions. Word has length 106 [2020-12-22 10:22:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:58,010 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6737 transitions. [2020-12-22 10:22:58,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6737 transitions. [2020-12-22 10:22:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:58,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:58,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:58,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:22:58,012 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:22:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:58,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477888570] [2020-12-22 10:22:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:58,114 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 10:22:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477888570] [2020-12-22 10:22:58,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:58,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:58,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782271398] [2020-12-22 10:22:58,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:58,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:58,118 INFO L87 Difference]: Start difference. First operand 4309 states and 6737 transitions. Second operand 3 states. [2020-12-22 10:22:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:58,351 INFO L93 Difference]: Finished difference Result 7251 states and 11333 transitions. [2020-12-22 10:22:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:58,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:58,365 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:22:58,365 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:58,370 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 10:22:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:22:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:22:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:22:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8203 transitions. [2020-12-22 10:22:58,668 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8203 transitions. Word has length 108 [2020-12-22 10:22:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:58,669 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8203 transitions. [2020-12-22 10:22:58,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8203 transitions. [2020-12-22 10:22:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:58,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:58,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:58,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:22:58,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:22:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:58,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118922555] [2020-12-22 10:22:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:59,053 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 10:22:59,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118922555] [2020-12-22 10:22:59,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:59,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175711064] [2020-12-22 10:22:59,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:59,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:59,056 INFO L87 Difference]: Start difference. First operand 5263 states and 8203 transitions. Second operand 10 states. [2020-12-22 10:22:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:59,780 INFO L93 Difference]: Finished difference Result 8203 states and 12773 transitions. [2020-12-22 10:22:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:59,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:22:59,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:59,793 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:22:59,793 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:59,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:22:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:23:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:23:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:23:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8179 transitions. [2020-12-22 10:23:00,154 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8179 transitions. Word has length 108 [2020-12-22 10:23:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:00,154 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8179 transitions. [2020-12-22 10:23:00,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8179 transitions. [2020-12-22 10:23:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:00,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:00,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:00,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:23:00,157 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:23:00,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:00,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117140271] [2020-12-22 10:23:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:00,261 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 10:23:00,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117140271] [2020-12-22 10:23:00,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:00,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318074968] [2020-12-22 10:23:00,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:00,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:00,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:00,266 INFO L87 Difference]: Start difference. First operand 5263 states and 8179 transitions. Second operand 3 states. [2020-12-22 10:23:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:00,624 INFO L93 Difference]: Finished difference Result 10851 states and 16789 transitions. [2020-12-22 10:23:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:00,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:00,644 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:23:00,644 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:23:00,650 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 10:23:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:23:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:23:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:23:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12195 transitions. [2020-12-22 10:23:01,106 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12195 transitions. Word has length 108 [2020-12-22 10:23:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:01,107 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12195 transitions. [2020-12-22 10:23:01,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12195 transitions. [2020-12-22 10:23:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:01,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:01,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:01,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:23:01,109 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:23:01,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:01,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573743871] [2020-12-22 10:23:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:01,194 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 10:23:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573743871] [2020-12-22 10:23:01,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:01,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:01,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062604810] [2020-12-22 10:23:01,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:01,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:01,196 INFO L87 Difference]: Start difference. First operand 7911 states and 12195 transitions. Second operand 3 states. [2020-12-22 10:23:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:01,978 INFO L93 Difference]: Finished difference Result 18507 states and 28357 transitions. [2020-12-22 10:23:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:01,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:02,008 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:23:02,008 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:23:02,016 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 10:23:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:23:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:23:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:23:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19699 transitions. [2020-12-22 10:23:02,867 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19699 transitions. Word has length 108 [2020-12-22 10:23:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:02,867 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19699 transitions. [2020-12-22 10:23:02,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19699 transitions. [2020-12-22 10:23:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:02,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:02,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:02,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:23:02,870 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:23:02,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:02,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293253296] [2020-12-22 10:23:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:02,966 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 10:23:02,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293253296] [2020-12-22 10:23:02,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:02,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:02,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606170219] [2020-12-22 10:23:02,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:02,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:02,973 INFO L87 Difference]: Start difference. First operand 12919 states and 19699 transitions. Second operand 3 states. [2020-12-22 10:23:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:04,530 INFO L93 Difference]: Finished difference Result 32955 states and 49909 transitions. [2020-12-22 10:23:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:04,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:04,580 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:23:04,580 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:23:04,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:23:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:23:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:23:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33651 transitions. [2020-12-22 10:23:06,224 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33651 transitions. Word has length 108 [2020-12-22 10:23:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:06,224 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33651 transitions. [2020-12-22 10:23:06,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33651 transitions. [2020-12-22 10:23:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:23:06,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:06,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:06,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:23:06,227 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:06,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:23:06,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:06,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474984944] [2020-12-22 10:23:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:06,320 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 10:23:06,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474984944] [2020-12-22 10:23:06,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:06,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:06,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116768131] [2020-12-22 10:23:06,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:23:06,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:23:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:23:06,322 INFO L87 Difference]: Start difference. First operand 22359 states and 33651 transitions. Second operand 3 states. [2020-12-22 10:23:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:08,416 INFO L93 Difference]: Finished difference Result 60123 states and 89845 transitions. [2020-12-22 10:23:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:23:08,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:23:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:08,581 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:23:08,582 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:23:08,610 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 10:23:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:23:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:23:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:23:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59443 transitions. [2020-12-22 10:23:11,396 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59443 transitions. Word has length 108 [2020-12-22 10:23:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:11,396 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59443 transitions. [2020-12-22 10:23:11,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59443 transitions. [2020-12-22 10:23:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:23:11,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:11,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:11,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:23:11,398 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:23:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456842653] [2020-12-22 10:23:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:11,544 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 10:23:11,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456842653] [2020-12-22 10:23:11,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:11,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:23:11,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001940414] [2020-12-22 10:23:11,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:23:11,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:11,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:23:11,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:23:11,546 INFO L87 Difference]: Start difference. First operand 40087 states and 59443 transitions. Second operand 8 states. [2020-12-22 10:23:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:15,893 INFO L93 Difference]: Finished difference Result 72254 states and 106020 transitions. [2020-12-22 10:23:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:15,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:23:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:15,990 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:23:15,990 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:23:16,006 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 10:23:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:23:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:23:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:23:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60851 transitions. [2020-12-22 10:23:19,162 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60851 transitions. Word has length 109 [2020-12-22 10:23:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:19,162 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60851 transitions. [2020-12-22 10:23:19,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:23:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60851 transitions. [2020-12-22 10:23:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:23:19,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:19,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:19,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:23:19,169 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 6638733, now seen corresponding path program 1 times [2020-12-22 10:23:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:19,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117122446] [2020-12-22 10:23:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117122446] [2020-12-22 10:23:19,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:19,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064840616] [2020-12-22 10:23:19,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:23:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:19,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:23:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:19,391 INFO L87 Difference]: Start difference. First operand 41623 states and 60851 transitions. Second operand 4 states. [2020-12-22 10:23:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:28,538 INFO L93 Difference]: Finished difference Result 44666 states and 66499 transitions. [2020-12-22 10:23:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:23:28,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 10:23:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:28,584 INFO L225 Difference]: With dead ends: 44666 [2020-12-22 10:23:28,585 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:23:28,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:23:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:23:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:23:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62429 transitions. [2020-12-22 10:23:31,298 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62429 transitions. Word has length 131 [2020-12-22 10:23:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:31,299 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62429 transitions. [2020-12-22 10:23:31,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:23:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62429 transitions. [2020-12-22 10:23:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:31,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:31,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:31,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:23:31,322 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:23:31,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:31,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3469848] [2020-12-22 10:23:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:23:31,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3469848] [2020-12-22 10:23:31,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:31,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:31,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043573874] [2020-12-22 10:23:31,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:31,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:31,531 INFO L87 Difference]: Start difference. First operand 43125 states and 62429 transitions. Second operand 10 states. [2020-12-22 10:23:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:49,945 INFO L93 Difference]: Finished difference Result 365063 states and 530726 transitions. [2020-12-22 10:23:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:49,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:50,602 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:23:50,602 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:23:50,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:23:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:23:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:23:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119261 transitions. [2020-12-22 10:23:58,306 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119261 transitions. Word has length 149 [2020-12-22 10:23:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:58,307 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119261 transitions. [2020-12-22 10:23:58,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119261 transitions. [2020-12-22 10:23:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:58,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:58,334 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:58,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:58,334 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:23:58,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:58,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110756448] [2020-12-22 10:23:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:23:58,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110756448] [2020-12-22 10:23:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:58,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425208128] [2020-12-22 10:23:58,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:58,586 INFO L87 Difference]: Start difference. First operand 82421 states and 119261 transitions. Second operand 10 states. [2020-12-22 10:24:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:21,493 INFO L93 Difference]: Finished difference Result 404359 states and 587558 transitions. [2020-12-22 10:24:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:21,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:22,230 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:24:22,230 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:24:22,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:24:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:24:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:24:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 204189 transitions. [2020-12-22 10:24:34,646 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 204189 transitions. Word has length 149 [2020-12-22 10:24:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:34,647 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 204189 transitions. [2020-12-22 10:24:34,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 204189 transitions. [2020-12-22 10:24:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:34,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:34,675 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:34,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:24:34,675 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:24:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:34,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270740004] [2020-12-22 10:24:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:24:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270740004] [2020-12-22 10:24:35,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:35,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000832112] [2020-12-22 10:24:35,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:35,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:35,165 INFO L87 Difference]: Start difference. First operand 141429 states and 204189 transitions. Second operand 10 states. [2020-12-22 10:25:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:02,843 INFO L93 Difference]: Finished difference Result 443655 states and 644390 transitions. [2020-12-22 10:25:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:02,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:25:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:03,685 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:25:03,686 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:25:03,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:25:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:25:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states. [2020-12-22 10:25:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180725 states to 180725 states and 261021 transitions. [2020-12-22 10:25:19,798 INFO L78 Accepts]: Start accepts. Automaton has 180725 states and 261021 transitions. Word has length 149 [2020-12-22 10:25:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:19,798 INFO L481 AbstractCegarLoop]: Abstraction has 180725 states and 261021 transitions. [2020-12-22 10:25:19,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 180725 states and 261021 transitions. [2020-12-22 10:25:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:25:19,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:19,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:25:19,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:25:19,824 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:25:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:19,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679902192] [2020-12-22 10:25:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:25:20,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679902192] [2020-12-22 10:25:20,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:20,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743598979] [2020-12-22 10:25:20,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:20,342 INFO L87 Difference]: Start difference. First operand 180725 states and 261021 transitions. Second operand 10 states.