/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.6.ufo.UNBOUNDED.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:06:43,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:06:43,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:06:43,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:06:43,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:06:43,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:06:43,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:06:43,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:06:43,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:06:43,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:06:43,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:06:43,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:06:43,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:06:43,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:06:43,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:06:43,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:06:43,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:06:43,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:06:43,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:06:43,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:06:43,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:06:43,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:06:43,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:06:43,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:06:43,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:06:43,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:06:43,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:06:43,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:06:43,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:06:43,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:06:43,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:06:43,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:06:43,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:06:43,889 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:06:43,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:06:43,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:06:43,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:06:43,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:06:43,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:06:43,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:06:43,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:06:43,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:06:43,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:06:43,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:06:43,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:06:43,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:06:43,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:06:43,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:06:43,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:06:43,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:06:43,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:06:43,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:06:43,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:06:43,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:06:43,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:06:44,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:06:44,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:06:44,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:06:44,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:06:44,388 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:06:44,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:06:44,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ebb5b7e/f19dc917dc1f403eb3a52bb65044c747/FLAGfd04009a5 [2020-12-22 10:06:45,676 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:06:45,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:06:45,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ebb5b7e/f19dc917dc1f403eb3a52bb65044c747/FLAGfd04009a5 [2020-12-22 10:06:46,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ebb5b7e/f19dc917dc1f403eb3a52bb65044c747 [2020-12-22 10:06:46,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:06:46,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:06:46,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:06:46,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:06:46,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:06:46,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:46" (1/1) ... [2020-12-22 10:06:46,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee48527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:46, skipping insertion in model container [2020-12-22 10:06:46,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:06:46" (1/1) ... [2020-12-22 10:06:46,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:06:46,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:06:46,776 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15614,15627] [2020-12-22 10:06:46,833 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17708,17721] [2020-12-22 10:06:47,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:06:47,977 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:06:48,071 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15614,15627] [2020-12-22 10:06:48,079 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.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17708,17721] [2020-12-22 10:06:48,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:06:48,837 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:06:48,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48 WrapperNode [2020-12-22 10:06:48,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:06:48,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:06:48,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:06:48,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:06:48,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:48,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:06:49,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:06:49,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:06:49,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:06:49,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (1/1) ... [2020-12-22 10:06:49,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:06:49,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:06:49,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:06:49,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:06:49,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (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 10:06:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:06:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:06:50,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:06:50,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:06:57,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:06:57,369 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:06:57,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:57 BoogieIcfgContainer [2020-12-22 10:06:57,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:06:57,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:06:57,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:06:57,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:06:57,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:06:46" (1/3) ... [2020-12-22 10:06:57,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9602b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:57, skipping insertion in model container [2020-12-22 10:06:57,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:06:48" (2/3) ... [2020-12-22 10:06:57,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9602b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:06:57, skipping insertion in model container [2020-12-22 10:06:57,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:06:57" (3/3) ... [2020-12-22 10:06:57,382 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 10:06:57,389 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:06:57,394 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:06:57,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:06:57,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:06:57,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:06:57,448 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:06:57,448 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:06:57,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:06:57,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:06:57,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:06:57,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:06:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states. [2020-12-22 10:06:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:06:57,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:57,491 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] [2020-12-22 10:06:57,492 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -584181659, now seen corresponding path program 1 times [2020-12-22 10:06:57,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:57,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446248253] [2020-12-22 10:06:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:57,830 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 10:06:57,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446248253] [2020-12-22 10:06:57,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:57,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:06:57,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515459822] [2020-12-22 10:06:57,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:57,860 INFO L87 Difference]: Start difference. First operand 927 states. Second operand 3 states. [2020-12-22 10:07:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:06,524 INFO L93 Difference]: Finished difference Result 2561 states and 4922 transitions. [2020-12-22 10:07:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:06,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 10:07:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:06,567 INFO L225 Difference]: With dead ends: 2561 [2020-12-22 10:07:06,567 INFO L226 Difference]: Without dead ends: 1612 [2020-12-22 10:07:06,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:07:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-22 10:07:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1612. [2020-12-22 10:07:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 10:07:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2961 transitions. [2020-12-22 10:07:06,719 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2961 transitions. Word has length 20 [2020-12-22 10:07:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:06,720 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2961 transitions. [2020-12-22 10:07:06,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2961 transitions. [2020-12-22 10:07:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:07:06,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:06,722 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] [2020-12-22 10:07:06,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:07:06,723 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2020-12-22 10:07:06,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:06,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693224407] [2020-12-22 10:07:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:06,892 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 10:07:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693224407] [2020-12-22 10:07:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:06,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678465395] [2020-12-22 10:07:06,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:07:06,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:06,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:07:06,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:07:06,897 INFO L87 Difference]: Start difference. First operand 1612 states and 2961 transitions. Second operand 5 states. [2020-12-22 10:07:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,079 INFO L93 Difference]: Finished difference Result 1677 states and 3062 transitions. [2020-12-22 10:07:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:07:07,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:07:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,091 INFO L225 Difference]: With dead ends: 1677 [2020-12-22 10:07:07,091 INFO L226 Difference]: Without dead ends: 1612 [2020-12-22 10:07:07,093 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 10:07:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-22 10:07:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1612. [2020-12-22 10:07:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-12-22 10:07:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2921 transitions. [2020-12-22 10:07:07,145 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2921 transitions. Word has length 38 [2020-12-22 10:07:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:07,145 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2921 transitions. [2020-12-22 10:07:07,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:07:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2921 transitions. [2020-12-22 10:07:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:07,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:07,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:07,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:07:07,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2020-12-22 10:07:07,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:07,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022450849] [2020-12-22 10:07:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:07,320 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 10:07:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022450849] [2020-12-22 10:07:07,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:07,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218397128] [2020-12-22 10:07:07,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:07,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:07,331 INFO L87 Difference]: Start difference. First operand 1612 states and 2921 transitions. Second operand 3 states. [2020-12-22 10:07:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,389 INFO L93 Difference]: Finished difference Result 1728 states and 3105 transitions. [2020-12-22 10:07:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:07,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,402 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:07:07,403 INFO L226 Difference]: Without dead ends: 1667 [2020-12-22 10:07:07,404 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 10:07:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-12-22 10:07:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1665. [2020-12-22 10:07:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2020-12-22 10:07:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3006 transitions. [2020-12-22 10:07:07,464 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3006 transitions. Word has length 77 [2020-12-22 10:07:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:07,464 INFO L481 AbstractCegarLoop]: Abstraction has 1665 states and 3006 transitions. [2020-12-22 10:07:07,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3006 transitions. [2020-12-22 10:07:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:07,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:07,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:07,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:07:07,468 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:07,469 INFO L82 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2020-12-22 10:07:07,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:07,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592683825] [2020-12-22 10:07:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:07,576 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 10:07:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592683825] [2020-12-22 10:07:07,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:07,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023481560] [2020-12-22 10:07:07,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:07,580 INFO L87 Difference]: Start difference. First operand 1665 states and 3006 transitions. Second operand 3 states. [2020-12-22 10:07:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,642 INFO L93 Difference]: Finished difference Result 1881 states and 3350 transitions. [2020-12-22 10:07:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:07,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,654 INFO L225 Difference]: With dead ends: 1881 [2020-12-22 10:07:07,655 INFO L226 Difference]: Without dead ends: 1767 [2020-12-22 10:07:07,656 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 10:07:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-12-22 10:07:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1765. [2020-12-22 10:07:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1765 states. [2020-12-22 10:07:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3165 transitions. [2020-12-22 10:07:07,716 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3165 transitions. Word has length 77 [2020-12-22 10:07:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:07,716 INFO L481 AbstractCegarLoop]: Abstraction has 1765 states and 3165 transitions. [2020-12-22 10:07:07,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3165 transitions. [2020-12-22 10:07:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:07,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:07,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:07:07,719 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:07,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2020-12-22 10:07:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890489888] [2020-12-22 10:07:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:07,876 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 10:07:07,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890489888] [2020-12-22 10:07:07,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:07,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:07,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109825558] [2020-12-22 10:07:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:07,882 INFO L87 Difference]: Start difference. First operand 1765 states and 3165 transitions. Second operand 3 states. [2020-12-22 10:07:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:07,964 INFO L93 Difference]: Finished difference Result 2169 states and 3807 transitions. [2020-12-22 10:07:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:07,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:07,978 INFO L225 Difference]: With dead ends: 2169 [2020-12-22 10:07:07,979 INFO L226 Difference]: Without dead ends: 1955 [2020-12-22 10:07:07,980 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 10:07:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-12-22 10:07:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1953. [2020-12-22 10:07:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-12-22 10:07:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3461 transitions. [2020-12-22 10:07:08,100 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3461 transitions. Word has length 77 [2020-12-22 10:07:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:08,103 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 3461 transitions. [2020-12-22 10:07:08,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3461 transitions. [2020-12-22 10:07:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:08,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:08,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:08,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:07:08,105 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2020-12-22 10:07:08,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:08,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185541595] [2020-12-22 10:07:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:08,197 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 10:07:08,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185541595] [2020-12-22 10:07:08,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:08,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93785519] [2020-12-22 10:07:08,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:08,200 INFO L87 Difference]: Start difference. First operand 1953 states and 3461 transitions. Second operand 3 states. [2020-12-22 10:07:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:08,269 INFO L93 Difference]: Finished difference Result 2709 states and 4655 transitions. [2020-12-22 10:07:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:08,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:08,283 INFO L225 Difference]: With dead ends: 2709 [2020-12-22 10:07:08,284 INFO L226 Difference]: Without dead ends: 2307 [2020-12-22 10:07:08,286 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 10:07:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2020-12-22 10:07:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2305. [2020-12-22 10:07:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-12-22 10:07:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 4009 transitions. [2020-12-22 10:07:08,357 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 4009 transitions. Word has length 77 [2020-12-22 10:07:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:08,357 INFO L481 AbstractCegarLoop]: Abstraction has 2305 states and 4009 transitions. [2020-12-22 10:07:08,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 4009 transitions. [2020-12-22 10:07:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:08,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:08,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:08,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:07:08,359 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2020-12-22 10:07:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116517698] [2020-12-22 10:07:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:08,434 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 10:07:08,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116517698] [2020-12-22 10:07:08,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:08,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:08,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821863393] [2020-12-22 10:07:08,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:08,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:08,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:08,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:08,437 INFO L87 Difference]: Start difference. First operand 2305 states and 4009 transitions. Second operand 3 states. [2020-12-22 10:07:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:08,525 INFO L93 Difference]: Finished difference Result 3717 states and 6219 transitions. [2020-12-22 10:07:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:08,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:07:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:08,543 INFO L225 Difference]: With dead ends: 3717 [2020-12-22 10:07:08,543 INFO L226 Difference]: Without dead ends: 2963 [2020-12-22 10:07:08,546 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 10:07:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-12-22 10:07:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2961. [2020-12-22 10:07:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2961 states. [2020-12-22 10:07:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 5017 transitions. [2020-12-22 10:07:08,658 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 5017 transitions. Word has length 77 [2020-12-22 10:07:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:08,659 INFO L481 AbstractCegarLoop]: Abstraction has 2961 states and 5017 transitions. [2020-12-22 10:07:08,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 5017 transitions. [2020-12-22 10:07:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:07:08,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:08,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:08,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:07:08,661 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2020-12-22 10:07:08,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:08,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376470342] [2020-12-22 10:07:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:08,879 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 10:07:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376470342] [2020-12-22 10:07:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001777237] [2020-12-22 10:07:08,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:08,882 INFO L87 Difference]: Start difference. First operand 2961 states and 5017 transitions. Second operand 8 states. [2020-12-22 10:07:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:10,082 INFO L93 Difference]: Finished difference Result 19881 states and 31333 transitions. [2020-12-22 10:07:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:07:10,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:07:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:10,163 INFO L225 Difference]: With dead ends: 19881 [2020-12-22 10:07:10,164 INFO L226 Difference]: Without dead ends: 18471 [2020-12-22 10:07:10,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:07:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18471 states. [2020-12-22 10:07:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18471 to 4369. [2020-12-22 10:07:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4369 states. [2020-12-22 10:07:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7145 transitions. [2020-12-22 10:07:10,628 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7145 transitions. Word has length 77 [2020-12-22 10:07:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:10,629 INFO L481 AbstractCegarLoop]: Abstraction has 4369 states and 7145 transitions. [2020-12-22 10:07:10,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7145 transitions. [2020-12-22 10:07:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:10,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:10,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:10,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:07:10,631 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2020-12-22 10:07:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:10,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629112734] [2020-12-22 10:07:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:10,713 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 10:07:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629112734] [2020-12-22 10:07:10,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:10,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:10,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097686026] [2020-12-22 10:07:10,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:10,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:10,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:10,717 INFO L87 Difference]: Start difference. First operand 4369 states and 7145 transitions. Second operand 3 states. [2020-12-22 10:07:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:11,085 INFO L93 Difference]: Finished difference Result 9653 states and 15179 transitions. [2020-12-22 10:07:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:11,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:07:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:11,107 INFO L225 Difference]: With dead ends: 9653 [2020-12-22 10:07:11,107 INFO L226 Difference]: Without dead ends: 6835 [2020-12-22 10:07:11,115 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 10:07:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2020-12-22 10:07:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6769. [2020-12-22 10:07:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10633 transitions. [2020-12-22 10:07:11,665 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10633 transitions. Word has length 79 [2020-12-22 10:07:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:11,666 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10633 transitions. [2020-12-22 10:07:11,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10633 transitions. [2020-12-22 10:07:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:07:11,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:11,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:11,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:07:11,669 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2020-12-22 10:07:11,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:11,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654354465] [2020-12-22 10:07:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:12,017 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 10:07:12,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654354465] [2020-12-22 10:07:12,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:12,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:12,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700180339] [2020-12-22 10:07:12,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:12,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:12,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:12,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:12,020 INFO L87 Difference]: Start difference. First operand 6769 states and 10633 transitions. Second operand 8 states. [2020-12-22 10:07:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:12,803 INFO L93 Difference]: Finished difference Result 11989 states and 18443 transitions. [2020-12-22 10:07:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:12,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:07:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:12,820 INFO L225 Difference]: With dead ends: 11989 [2020-12-22 10:07:12,821 INFO L226 Difference]: Without dead ends: 6771 [2020-12-22 10:07:12,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:07:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2020-12-22 10:07:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 6769. [2020-12-22 10:07:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10569 transitions. [2020-12-22 10:07:13,196 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10569 transitions. Word has length 79 [2020-12-22 10:07:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:13,197 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10569 transitions. [2020-12-22 10:07:13,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10569 transitions. [2020-12-22 10:07:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:13,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:13,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:13,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:07:13,199 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2020-12-22 10:07:13,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:13,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398029818] [2020-12-22 10:07:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:13,331 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 10:07:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398029818] [2020-12-22 10:07:13,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:13,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:07:13,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080319713] [2020-12-22 10:07:13,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:07:13,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:07:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:13,336 INFO L87 Difference]: Start difference. First operand 6769 states and 10569 transitions. Second operand 6 states. [2020-12-22 10:07:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:13,859 INFO L93 Difference]: Finished difference Result 11987 states and 18314 transitions. [2020-12-22 10:07:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:07:13,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 10:07:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:13,876 INFO L225 Difference]: With dead ends: 11987 [2020-12-22 10:07:13,876 INFO L226 Difference]: Without dead ends: 6769 [2020-12-22 10:07:13,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:07:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-12-22 10:07:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6769. [2020-12-22 10:07:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 10:07:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 10505 transitions. [2020-12-22 10:07:14,253 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 10505 transitions. Word has length 80 [2020-12-22 10:07:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:14,253 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 10505 transitions. [2020-12-22 10:07:14,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:07:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 10505 transitions. [2020-12-22 10:07:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:07:14,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:14,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:14,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:07:14,255 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2020-12-22 10:07:14,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:14,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746783009] [2020-12-22 10:07:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:14,427 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 10:07:14,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746783009] [2020-12-22 10:07:14,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:14,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:14,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721016146] [2020-12-22 10:07:14,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:14,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:14,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:14,430 INFO L87 Difference]: Start difference. First operand 6769 states and 10505 transitions. Second operand 8 states. [2020-12-22 10:07:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:15,453 INFO L93 Difference]: Finished difference Result 10675 states and 16148 transitions. [2020-12-22 10:07:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:07:15,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:07:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:15,479 INFO L225 Difference]: With dead ends: 10675 [2020-12-22 10:07:15,479 INFO L226 Difference]: Without dead ends: 10673 [2020-12-22 10:07:15,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:07:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2020-12-22 10:07:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6961. [2020-12-22 10:07:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2020-12-22 10:07:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10665 transitions. [2020-12-22 10:07:16,005 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10665 transitions. Word has length 80 [2020-12-22 10:07:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:16,006 INFO L481 AbstractCegarLoop]: Abstraction has 6961 states and 10665 transitions. [2020-12-22 10:07:16,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10665 transitions. [2020-12-22 10:07:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 10:07:16,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:16,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:07:16,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:07:16,008 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2020-12-22 10:07:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:16,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433556786] [2020-12-22 10:07:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:16,088 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 10:07:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433556786] [2020-12-22 10:07:16,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:16,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413740392] [2020-12-22 10:07:16,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:16,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:16,097 INFO L87 Difference]: Start difference. First operand 6961 states and 10665 transitions. Second operand 3 states. [2020-12-22 10:07:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:16,705 INFO L93 Difference]: Finished difference Result 12472 states and 18735 transitions. [2020-12-22 10:07:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:16,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 10:07:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:16,725 INFO L225 Difference]: With dead ends: 12472 [2020-12-22 10:07:16,725 INFO L226 Difference]: Without dead ends: 9461 [2020-12-22 10:07:16,734 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 10:07:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2020-12-22 10:07:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9459. [2020-12-22 10:07:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:07:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14219 transitions. [2020-12-22 10:07:17,475 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14219 transitions. Word has length 81 [2020-12-22 10:07:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:17,475 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 14219 transitions. [2020-12-22 10:07:17,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14219 transitions. [2020-12-22 10:07:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 10:07:17,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:17,479 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:17,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:07:17,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1548351410, now seen corresponding path program 1 times [2020-12-22 10:07:17,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:17,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133127408] [2020-12-22 10:07:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:17,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133127408] [2020-12-22 10:07:17,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:17,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:07:17,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246707063] [2020-12-22 10:07:17,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:07:17,557 INFO L87 Difference]: Start difference. First operand 9459 states and 14219 transitions. Second operand 3 states. [2020-12-22 10:07:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:26,548 INFO L93 Difference]: Finished difference Result 11714 states and 18334 transitions. [2020-12-22 10:07:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:26,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 10:07:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:26,574 INFO L225 Difference]: With dead ends: 11714 [2020-12-22 10:07:26,574 INFO L226 Difference]: Without dead ends: 10210 [2020-12-22 10:07:26,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:07:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2020-12-22 10:07:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 10210. [2020-12-22 10:07:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:07:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 14694 transitions. [2020-12-22 10:07:27,178 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 14694 transitions. Word has length 89 [2020-12-22 10:07:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:27,178 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 14694 transitions. [2020-12-22 10:07:27,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 14694 transitions. [2020-12-22 10:07:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:07:27,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:27,180 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:27,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:07:27,181 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1225745971, now seen corresponding path program 1 times [2020-12-22 10:07:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:27,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654504515] [2020-12-22 10:07:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:27,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654504515] [2020-12-22 10:07:27,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304416055] [2020-12-22 10:07:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:07:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:07:27,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:07:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:27,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:07:27,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:07:27,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487894734] [2020-12-22 10:07:27,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:07:27,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:07:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:27,777 INFO L87 Difference]: Start difference. First operand 10210 states and 14694 transitions. Second operand 3 states. [2020-12-22 10:07:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:38,030 INFO L93 Difference]: Finished difference Result 14718 states and 21195 transitions. [2020-12-22 10:07:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:07:38,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:07:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:38,057 INFO L225 Difference]: With dead ends: 14718 [2020-12-22 10:07:38,058 INFO L226 Difference]: Without dead ends: 12463 [2020-12-22 10:07:38,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:07:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12463 states. [2020-12-22 10:07:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12463 to 12463. [2020-12-22 10:07:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12463 states. [2020-12-22 10:07:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 17271 transitions. [2020-12-22 10:07:38,670 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 17271 transitions. Word has length 91 [2020-12-22 10:07:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:38,671 INFO L481 AbstractCegarLoop]: Abstraction has 12463 states and 17271 transitions. [2020-12-22 10:07:38,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:07:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 17271 transitions. [2020-12-22 10:07:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 10:07:38,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:38,673 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:38,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:07:38,888 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1760380898, now seen corresponding path program 1 times [2020-12-22 10:07:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:38,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777461090] [2020-12-22 10:07:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:07:39,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777461090] [2020-12-22 10:07:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:07:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145341957] [2020-12-22 10:07:39,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:07:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:07:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:07:39,026 INFO L87 Difference]: Start difference. First operand 12463 states and 17271 transitions. Second operand 4 states. [2020-12-22 10:07:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:53,199 INFO L93 Difference]: Finished difference Result 22228 states and 29725 transitions. [2020-12-22 10:07:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:07:53,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-12-22 10:07:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:53,233 INFO L225 Difference]: With dead ends: 22228 [2020-12-22 10:07:53,234 INFO L226 Difference]: Without dead ends: 17720 [2020-12-22 10:07:53,242 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 10:07:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2020-12-22 10:07:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 17720. [2020-12-22 10:07:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17720 states. [2020-12-22 10:07:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17720 states to 17720 states and 23705 transitions. [2020-12-22 10:07:53,972 INFO L78 Accepts]: Start accepts. Automaton has 17720 states and 23705 transitions. Word has length 97 [2020-12-22 10:07:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:53,972 INFO L481 AbstractCegarLoop]: Abstraction has 17720 states and 23705 transitions. [2020-12-22 10:07:53,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:07:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17720 states and 23705 transitions. [2020-12-22 10:07:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:53,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:53,979 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:53,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:07:53,979 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash 651816077, now seen corresponding path program 1 times [2020-12-22 10:07:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:53,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686356556] [2020-12-22 10:07:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:07:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686356556] [2020-12-22 10:07:54,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:54,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:54,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666379218] [2020-12-22 10:07:54,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:54,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:54,164 INFO L87 Difference]: Start difference. First operand 17720 states and 23705 transitions. Second operand 8 states. [2020-12-22 10:07:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:07:57,034 INFO L93 Difference]: Finished difference Result 66726 states and 94240 transitions. [2020-12-22 10:07:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:07:57,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:07:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:07:57,109 INFO L225 Difference]: With dead ends: 66726 [2020-12-22 10:07:57,110 INFO L226 Difference]: Without dead ends: 58820 [2020-12-22 10:07:57,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:07:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58820 states. [2020-12-22 10:07:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58820 to 25624. [2020-12-22 10:07:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25624 states. [2020-12-22 10:07:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 35001 transitions. [2020-12-22 10:07:59,035 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 35001 transitions. Word has length 111 [2020-12-22 10:07:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:07:59,036 INFO L481 AbstractCegarLoop]: Abstraction has 25624 states and 35001 transitions. [2020-12-22 10:07:59,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:07:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 35001 transitions. [2020-12-22 10:07:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:07:59,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:07:59,044 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:07:59,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:07:59,045 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:07:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:07:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1116966739, now seen corresponding path program 1 times [2020-12-22 10:07:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:07:59,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803613841] [2020-12-22 10:07:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:07:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:07:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:07:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803613841] [2020-12-22 10:07:59,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:07:59,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:07:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215878860] [2020-12-22 10:07:59,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:07:59,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:07:59,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:07:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:07:59,251 INFO L87 Difference]: Start difference. First operand 25624 states and 35001 transitions. Second operand 8 states. [2020-12-22 10:08:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:03,437 INFO L93 Difference]: Finished difference Result 74630 states and 105536 transitions. [2020-12-22 10:08:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:03,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:03,522 INFO L225 Difference]: With dead ends: 74630 [2020-12-22 10:08:03,522 INFO L226 Difference]: Without dead ends: 66724 [2020-12-22 10:08:03,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66724 states. [2020-12-22 10:08:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66724 to 37496. [2020-12-22 10:08:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37496 states. [2020-12-22 10:08:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37496 states to 37496 states and 51865 transitions. [2020-12-22 10:08:06,346 INFO L78 Accepts]: Start accepts. Automaton has 37496 states and 51865 transitions. Word has length 111 [2020-12-22 10:08:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:06,346 INFO L481 AbstractCegarLoop]: Abstraction has 37496 states and 51865 transitions. [2020-12-22 10:08:06,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 37496 states and 51865 transitions. [2020-12-22 10:08:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:06,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:06,355 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:06,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:08:06,356 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:06,356 INFO L82 PathProgramCache]: Analyzing trace with hash 14673101, now seen corresponding path program 1 times [2020-12-22 10:08:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:06,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378665559] [2020-12-22 10:08:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:08:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378665559] [2020-12-22 10:08:06,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:06,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539626730] [2020-12-22 10:08:06,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:06,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:06,550 INFO L87 Difference]: Start difference. First operand 37496 states and 51865 transitions. Second operand 8 states. [2020-12-22 10:08:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:11,879 INFO L93 Difference]: Finished difference Result 82534 states and 116832 transitions. [2020-12-22 10:08:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:11,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:11,970 INFO L225 Difference]: With dead ends: 82534 [2020-12-22 10:08:11,970 INFO L226 Difference]: Without dead ends: 74628 [2020-12-22 10:08:11,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74628 states. [2020-12-22 10:08:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74628 to 45400. [2020-12-22 10:08:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45400 states. [2020-12-22 10:08:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45400 states to 45400 states and 63161 transitions. [2020-12-22 10:08:15,367 INFO L78 Accepts]: Start accepts. Automaton has 45400 states and 63161 transitions. Word has length 111 [2020-12-22 10:08:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:15,367 INFO L481 AbstractCegarLoop]: Abstraction has 45400 states and 63161 transitions. [2020-12-22 10:08:15,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 45400 states and 63161 transitions. [2020-12-22 10:08:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:15,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:15,374 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:15,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:08:15,375 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1220785939, now seen corresponding path program 1 times [2020-12-22 10:08:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:15,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440902892] [2020-12-22 10:08:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:08:15,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440902892] [2020-12-22 10:08:15,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:15,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:15,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294348142] [2020-12-22 10:08:15,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:15,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:15,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:15,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:15,552 INFO L87 Difference]: Start difference. First operand 45400 states and 63161 transitions. Second operand 8 states. [2020-12-22 10:08:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:21,419 INFO L93 Difference]: Finished difference Result 90438 states and 128128 transitions. [2020-12-22 10:08:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:21,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:21,504 INFO L225 Difference]: With dead ends: 90438 [2020-12-22 10:08:21,504 INFO L226 Difference]: Without dead ends: 82532 [2020-12-22 10:08:21,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82532 states. [2020-12-22 10:08:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82532 to 53304. [2020-12-22 10:08:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53304 states. [2020-12-22 10:08:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53304 states to 53304 states and 74457 transitions. [2020-12-22 10:08:25,565 INFO L78 Accepts]: Start accepts. Automaton has 53304 states and 74457 transitions. Word has length 111 [2020-12-22 10:08:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:25,565 INFO L481 AbstractCegarLoop]: Abstraction has 53304 states and 74457 transitions. [2020-12-22 10:08:25,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 53304 states and 74457 transitions. [2020-12-22 10:08:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:25,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:25,575 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:25,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:08:25,575 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1653185805, now seen corresponding path program 1 times [2020-12-22 10:08:25,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:25,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997592136] [2020-12-22 10:08:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:08:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997592136] [2020-12-22 10:08:25,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:25,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717345766] [2020-12-22 10:08:25,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:25,759 INFO L87 Difference]: Start difference. First operand 53304 states and 74457 transitions. Second operand 8 states. [2020-12-22 10:08:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:32,553 INFO L93 Difference]: Finished difference Result 98342 states and 139424 transitions. [2020-12-22 10:08:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:32,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:32,646 INFO L225 Difference]: With dead ends: 98342 [2020-12-22 10:08:32,646 INFO L226 Difference]: Without dead ends: 90436 [2020-12-22 10:08:32,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90436 states. [2020-12-22 10:08:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90436 to 61208. [2020-12-22 10:08:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61208 states. [2020-12-22 10:08:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61208 states to 61208 states and 85753 transitions. [2020-12-22 10:08:37,675 INFO L78 Accepts]: Start accepts. Automaton has 61208 states and 85753 transitions. Word has length 111 [2020-12-22 10:08:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:37,675 INFO L481 AbstractCegarLoop]: Abstraction has 61208 states and 85753 transitions. [2020-12-22 10:08:37,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 61208 states and 85753 transitions. [2020-12-22 10:08:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:08:37,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:37,684 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:08:37,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:08:37,684 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2019174363, now seen corresponding path program 1 times [2020-12-22 10:08:37,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:37,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228218281] [2020-12-22 10:08:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228218281] [2020-12-22 10:08:37,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:37,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773094254] [2020-12-22 10:08:37,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:37,802 INFO L87 Difference]: Start difference. First operand 61208 states and 85753 transitions. Second operand 3 states. [2020-12-22 10:08:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:41,030 INFO L93 Difference]: Finished difference Result 97021 states and 137378 transitions. [2020-12-22 10:08:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:41,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:08:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:41,086 INFO L225 Difference]: With dead ends: 97021 [2020-12-22 10:08:41,087 INFO L226 Difference]: Without dead ends: 45627 [2020-12-22 10:08:41,116 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 10:08:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45627 states. [2020-12-22 10:08:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45627 to 45625. [2020-12-22 10:08:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45625 states. [2020-12-22 10:08:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45625 states to 45625 states and 63519 transitions. [2020-12-22 10:08:44,610 INFO L78 Accepts]: Start accepts. Automaton has 45625 states and 63519 transitions. Word has length 113 [2020-12-22 10:08:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:44,610 INFO L481 AbstractCegarLoop]: Abstraction has 45625 states and 63519 transitions. [2020-12-22 10:08:44,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45625 states and 63519 transitions. [2020-12-22 10:08:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:08:44,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:44,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:44,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:08:44,616 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -21629902, now seen corresponding path program 1 times [2020-12-22 10:08:44,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411566084] [2020-12-22 10:08:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:08:44,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411566084] [2020-12-22 10:08:44,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:44,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:44,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009331765] [2020-12-22 10:08:44,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:44,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:44,790 INFO L87 Difference]: Start difference. First operand 45625 states and 63519 transitions. Second operand 8 states. [2020-12-22 10:08:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:50,680 INFO L93 Difference]: Finished difference Result 78663 states and 111142 transitions. [2020-12-22 10:08:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:50,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-12-22 10:08:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:50,754 INFO L225 Difference]: With dead ends: 78663 [2020-12-22 10:08:50,754 INFO L226 Difference]: Without dead ends: 73157 [2020-12-22 10:08:50,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73157 states. [2020-12-22 10:08:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73157 to 51129. [2020-12-22 10:08:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51129 states. [2020-12-22 10:08:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51129 states to 51129 states and 71391 transitions. [2020-12-22 10:08:55,025 INFO L78 Accepts]: Start accepts. Automaton has 51129 states and 71391 transitions. Word has length 113 [2020-12-22 10:08:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:55,026 INFO L481 AbstractCegarLoop]: Abstraction has 51129 states and 71391 transitions. [2020-12-22 10:08:55,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51129 states and 71391 transitions. [2020-12-22 10:08:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:08:55,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:55,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:55,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:08:55,033 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 254785081, now seen corresponding path program 1 times [2020-12-22 10:08:55,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:55,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533017840] [2020-12-22 10:08:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:55,645 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 10:08:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:08:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533017840] [2020-12-22 10:08:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820676300] [2020-12-22 10:08:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:08:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:08:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:08:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:08:56,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:08:56,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:08:56,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047185368] [2020-12-22 10:08:56,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:08:56,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:56,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:08:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:08:56,538 INFO L87 Difference]: Start difference. First operand 51129 states and 71391 transitions. Second operand 16 states. [2020-12-22 10:08:57,108 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:08:58,267 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:08:58,549 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:08:59,200 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:09:03,900 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:09:04,266 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 10:09:11,741 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:09:11,972 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 10:09:12,721 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:09:13,006 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 10:09:13,247 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:09:14,182 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:09:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:31,280 INFO L93 Difference]: Finished difference Result 317070 states and 445626 transitions. [2020-12-22 10:09:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 10:09:31,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 114 [2020-12-22 10:09:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:32,087 INFO L225 Difference]: With dead ends: 317070 [2020-12-22 10:09:32,087 INFO L226 Difference]: Without dead ends: 275788 [2020-12-22 10:09:32,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 10:09:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275788 states. [2020-12-22 10:09:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275788 to 142822. [2020-12-22 10:09:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142822 states. [2020-12-22 10:09:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142822 states to 142822 states and 197629 transitions. [2020-12-22 10:09:48,782 INFO L78 Accepts]: Start accepts. Automaton has 142822 states and 197629 transitions. Word has length 114 [2020-12-22 10:09:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:48,783 INFO L481 AbstractCegarLoop]: Abstraction has 142822 states and 197629 transitions. [2020-12-22 10:09:48,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:09:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 142822 states and 197629 transitions. [2020-12-22 10:09:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:09:48,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:48,802 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:09:49,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:09:49,017 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash -725866966, now seen corresponding path program 1 times [2020-12-22 10:09:49,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:49,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727545022] [2020-12-22 10:09:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:49,420 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 10:09:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:49,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727545022] [2020-12-22 10:09:49,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478811271] [2020-12-22 10:09:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:09:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:09:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:50,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:09:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:51,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:09:51,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:09:51,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395453126] [2020-12-22 10:09:51,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:09:51,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:51,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:09:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:09:51,147 INFO L87 Difference]: Start difference. First operand 142822 states and 197629 transitions. Second operand 22 states. [2020-12-22 10:09:51,345 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:09:51,501 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:09:51,671 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:09:51,866 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 10:09:52,064 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:09:52,712 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-12-22 10:09:53,418 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 10:09:53,575 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:09:53,801 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:09:54,074 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:09:54,324 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:09:54,742 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:09:55,023 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:09:55,166 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 10:09:55,502 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-12-22 10:09:55,693 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:09:55,959 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 10:09:56,114 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:09:56,311 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:09:56,866 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 10:09:57,077 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:09:57,377 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 10:09:57,623 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-22 10:09:57,853 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-12-22 10:09:58,103 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:09:58,321 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:09:58,596 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 10:09:58,793 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:09:59,007 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:09:59,503 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:01,143 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:10:01,399 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:01,705 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-12-22 10:10:01,903 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:02,133 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:02,401 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:10:02,780 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:02,955 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:03,208 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:03,790 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:04,058 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-12-22 10:10:04,335 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:04,690 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:04,842 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:05,195 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 10:10:05,425 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 10:10:05,688 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:06,156 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-22 10:10:06,325 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-12-22 10:10:06,715 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:06,944 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:07,244 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:07,641 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:07,942 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:08,291 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:08,576 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:08,919 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:09,101 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-22 10:10:09,351 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:09,550 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:10:09,708 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 10:10:09,969 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:10,503 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:10:10,961 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:11,228 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:11,445 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:11,740 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:12,005 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:12,250 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:12,523 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:12,766 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:12,968 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:13,147 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 10:10:13,362 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 10:10:13,739 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:14,100 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:10:14,332 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 10:10:14,563 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:14,915 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:15,102 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:15,295 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:15,545 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:10:15,706 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-12-22 10:10:16,367 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:16,711 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:10:16,952 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:17,169 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:17,438 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:17,946 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-12-22 10:10:18,143 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:18,440 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-12-22 10:10:19,149 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-22 10:10:19,338 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:10:19,565 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:19,741 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 10:10:21,333 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:21,754 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:10:22,015 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:22,790 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:23,067 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:23,267 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:10:23,615 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:10:24,259 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:32,250 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 10:10:32,505 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-12-22 10:10:32,717 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:33,048 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-22 10:10:33,290 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:33,633 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49