/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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:08:09,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:08:09,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:08:09,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:08:09,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:08:09,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:08:09,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:08:09,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:08:09,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:08:09,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:08:09,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:08:09,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:08:09,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:08:09,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:08:09,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:08:09,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:08:09,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:08:09,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:08:09,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:08:09,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:08:09,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:08:09,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:08:09,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:08:09,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:08:09,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:08:09,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:08:09,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:08:09,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:08:09,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:08:09,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:08:09,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:08:09,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:08:09,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:08:09,646 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:08:09,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:08:09,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:08:09,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:08:09,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:08:09,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:08:09,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:08:09,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:08:09,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:08:09,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:08:09,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:08:09,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:08:09,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:08:09,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:08:09,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:08:09,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:08:09,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:08:09,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:08:09,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:08:09,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:08:09,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:08:09,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:08:10,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:08:10,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:08:10,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:08:10,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:08:10,097 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:08:10,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:08:10,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee2fafab/e70af8d7ef8f4465962457d969e18572/FLAG4f854b12f [2020-12-22 10:08:11,439 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:08:11,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:08:11,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee2fafab/e70af8d7ef8f4465962457d969e18572/FLAG4f854b12f [2020-12-22 10:08:11,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eee2fafab/e70af8d7ef8f4465962457d969e18572 [2020-12-22 10:08:11,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:08:11,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:08:11,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:11,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:08:11,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:08:11,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:11" (1/1) ... [2020-12-22 10:08:11,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348498cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:11, skipping insertion in model container [2020-12-22 10:08:11,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:11" (1/1) ... [2020-12-22 10:08:11,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:08:12,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:08:12,619 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[15688,15701] [2020-12-22 10:08:12,709 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[21000,21013] [2020-12-22 10:08:13,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:13,609 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:08:13,748 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[15688,15701] [2020-12-22 10:08:13,793 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_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[21000,21013] [2020-12-22 10:08:14,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:14,384 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:08:14,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14 WrapperNode [2020-12-22 10:08:14,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:14,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:14,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:08:14,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:08:14,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:14,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:14,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:14,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:08:14,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:08:14,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:08:14,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:14,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (1/1) ... [2020-12-22 10:08:15,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:08:15,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:08:15,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:08:15,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:08:15,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (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 10:08:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:08:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:08:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:08:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:08:21,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:08:21,575 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:08:21,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:21 BoogieIcfgContainer [2020-12-22 10:08:21,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:08:21,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:08:21,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:08:21,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:08:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:08:11" (1/3) ... [2020-12-22 10:08:21,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed731a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:21, skipping insertion in model container [2020-12-22 10:08:21,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:14" (2/3) ... [2020-12-22 10:08:21,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed731a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:21, skipping insertion in model container [2020-12-22 10:08:21,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:21" (3/3) ... [2020-12-22 10:08:21,589 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:08:21,596 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:08:21,604 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:08:21,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:08:21,664 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:08:21,664 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:08:21,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:08:21,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:08:21,665 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:08:21,665 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:08:21,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:08:21,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:08:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states. [2020-12-22 10:08:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:21,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:21,713 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 10:08:21,714 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:08:21,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:21,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775073213] [2020-12-22 10:08:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:22,056 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 10:08:22,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775073213] [2020-12-22 10:08:22,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:22,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:08:22,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127276330] [2020-12-22 10:08:22,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:08:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:22,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:08:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:08:22,088 INFO L87 Difference]: Start difference. First operand 925 states. Second operand 2 states. [2020-12-22 10:08:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:22,204 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2020-12-22 10:08:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:08:22,206 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:08:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:22,250 INFO L225 Difference]: With dead ends: 1802 [2020-12-22 10:08:22,250 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:22,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:08:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2020-12-22 10:08:22,387 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2020-12-22 10:08:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:22,387 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2020-12-22 10:08:22,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:08:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2020-12-22 10:08:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:22,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:22,396 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 10:08:22,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:08:22,397 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:08:22,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:22,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038887591] [2020-12-22 10:08:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:22,656 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 10:08:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038887591] [2020-12-22 10:08:22,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:22,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:22,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303211432] [2020-12-22 10:08:22,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:08:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:08:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:08:22,663 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand 5 states. [2020-12-22 10:08:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:22,837 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2020-12-22 10:08:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:08:22,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:08:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:22,845 INFO L225 Difference]: With dead ends: 922 [2020-12-22 10:08:22,845 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:22,847 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 10:08:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2020-12-22 10:08:22,878 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2020-12-22 10:08:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:22,878 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2020-12-22 10:08:22,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:08:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2020-12-22 10:08:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:08:22,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:22,880 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] [2020-12-22 10:08:22,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:08:22,881 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash -241240203, now seen corresponding path program 1 times [2020-12-22 10:08:22,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:22,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367330674] [2020-12-22 10:08:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:23,060 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 10:08:23,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367330674] [2020-12-22 10:08:23,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:23,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:08:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775111243] [2020-12-22 10:08:23,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:23,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:23,070 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand 3 states. [2020-12-22 10:08:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:29,075 INFO L93 Difference]: Finished difference Result 2363 states and 4452 transitions. [2020-12-22 10:08:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:29,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:08:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:29,087 INFO L225 Difference]: With dead ends: 2363 [2020-12-22 10:08:29,088 INFO L226 Difference]: Without dead ends: 1610 [2020-12-22 10:08:29,092 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 10:08:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2020-12-22 10:08:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2020-12-22 10:08:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-12-22 10:08:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2606 transitions. [2020-12-22 10:08:29,163 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2606 transitions. Word has length 48 [2020-12-22 10:08:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:29,164 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2606 transitions. [2020-12-22 10:08:29,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2606 transitions. [2020-12-22 10:08:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:29,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:29,168 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 10:08:29,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:08:29,168 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:08:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89918071] [2020-12-22 10:08:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:29,319 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 10:08:29,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89918071] [2020-12-22 10:08:29,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:29,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:29,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566900074] [2020-12-22 10:08:29,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:29,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:29,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:29,326 INFO L87 Difference]: Start difference. First operand 1610 states and 2606 transitions. Second operand 3 states. [2020-12-22 10:08:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:29,372 INFO L93 Difference]: Finished difference Result 1722 states and 2784 transitions. [2020-12-22 10:08:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:29,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:08:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:29,383 INFO L225 Difference]: With dead ends: 1722 [2020-12-22 10:08:29,383 INFO L226 Difference]: Without dead ends: 1663 [2020-12-22 10:08:29,385 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 10:08:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2020-12-22 10:08:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2020-12-22 10:08:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-12-22 10:08:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2688 transitions. [2020-12-22 10:08:29,439 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2688 transitions. Word has length 77 [2020-12-22 10:08:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 1661 states and 2688 transitions. [2020-12-22 10:08:29,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2688 transitions. [2020-12-22 10:08:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:29,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:29,441 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 10:08:29,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:08:29,441 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:08:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:29,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707967133] [2020-12-22 10:08:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:29,547 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 10:08:29,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707967133] [2020-12-22 10:08:29,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:29,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:29,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857826964] [2020-12-22 10:08:29,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:29,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:29,550 INFO L87 Difference]: Start difference. First operand 1661 states and 2688 transitions. Second operand 3 states. [2020-12-22 10:08:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:29,677 INFO L93 Difference]: Finished difference Result 1869 states and 3020 transitions. [2020-12-22 10:08:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:29,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:08:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:29,690 INFO L225 Difference]: With dead ends: 1869 [2020-12-22 10:08:29,690 INFO L226 Difference]: Without dead ends: 1759 [2020-12-22 10:08:29,692 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 10:08:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2020-12-22 10:08:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1757. [2020-12-22 10:08:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1757 states. [2020-12-22 10:08:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2841 transitions. [2020-12-22 10:08:29,751 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2841 transitions. Word has length 77 [2020-12-22 10:08:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:29,751 INFO L481 AbstractCegarLoop]: Abstraction has 1757 states and 2841 transitions. [2020-12-22 10:08:29,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2841 transitions. [2020-12-22 10:08:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:08:29,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:29,753 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 10:08:29,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:08:29,753 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:29,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:08:29,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:29,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756642432] [2020-12-22 10:08:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:29,964 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 10:08:29,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756642432] [2020-12-22 10:08:29,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:29,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:29,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151367872] [2020-12-22 10:08:29,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:29,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:29,968 INFO L87 Difference]: Start difference. First operand 1757 states and 2841 transitions. Second operand 8 states. [2020-12-22 10:08:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:30,433 INFO L93 Difference]: Finished difference Result 4229 states and 6789 transitions. [2020-12-22 10:08:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:08:30,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:08:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:30,458 INFO L225 Difference]: With dead ends: 4229 [2020-12-22 10:08:30,458 INFO L226 Difference]: Without dead ends: 4023 [2020-12-22 10:08:30,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:08:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2020-12-22 10:08:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 1961. [2020-12-22 10:08:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-12-22 10:08:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3161 transitions. [2020-12-22 10:08:30,566 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3161 transitions. Word has length 77 [2020-12-22 10:08:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:30,567 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 3161 transitions. [2020-12-22 10:08:30,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3161 transitions. [2020-12-22 10:08:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:30,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:30,569 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 10:08:30,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:08:30,574 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:08:30,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504606508] [2020-12-22 10:08:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:30,746 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 10:08:30,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504606508] [2020-12-22 10:08:30,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:30,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:30,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339508034] [2020-12-22 10:08:30,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:30,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:30,749 INFO L87 Difference]: Start difference. First operand 1961 states and 3161 transitions. Second operand 3 states. [2020-12-22 10:08:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:30,817 INFO L93 Difference]: Finished difference Result 2569 states and 4121 transitions. [2020-12-22 10:08:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:30,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:30,831 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 10:08:30,831 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 10:08:30,833 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 10:08:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 10:08:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2157. [2020-12-22 10:08:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-12-22 10:08:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3465 transitions. [2020-12-22 10:08:30,907 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3465 transitions. Word has length 79 [2020-12-22 10:08:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:30,907 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 3465 transitions. [2020-12-22 10:08:30,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3465 transitions. [2020-12-22 10:08:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:30,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:30,909 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 10:08:30,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:08:30,909 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:08:30,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:30,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724654451] [2020-12-22 10:08:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:31,158 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 10:08:31,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724654451] [2020-12-22 10:08:31,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:31,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552394105] [2020-12-22 10:08:31,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:31,160 INFO L87 Difference]: Start difference. First operand 2157 states and 3465 transitions. Second operand 8 states. [2020-12-22 10:08:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:31,527 INFO L93 Difference]: Finished difference Result 2763 states and 4417 transitions. [2020-12-22 10:08:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:31,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:08:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:31,541 INFO L225 Difference]: With dead ends: 2763 [2020-12-22 10:08:31,542 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 10:08:31,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:08:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 10:08:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2157. [2020-12-22 10:08:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-12-22 10:08:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3459 transitions. [2020-12-22 10:08:31,628 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3459 transitions. Word has length 79 [2020-12-22 10:08:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:31,629 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 3459 transitions. [2020-12-22 10:08:31,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3459 transitions. [2020-12-22 10:08:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:31,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:31,631 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 10:08:31,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:08:31,631 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:08:31,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542957610] [2020-12-22 10:08:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:31,707 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 10:08:31,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542957610] [2020-12-22 10:08:31,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:31,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:31,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978584393] [2020-12-22 10:08:31,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:31,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:31,710 INFO L87 Difference]: Start difference. First operand 2157 states and 3459 transitions. Second operand 3 states. [2020-12-22 10:08:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:31,798 INFO L93 Difference]: Finished difference Result 3293 states and 5229 transitions. [2020-12-22 10:08:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:31,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:31,814 INFO L225 Difference]: With dead ends: 3293 [2020-12-22 10:08:31,815 INFO L226 Difference]: Without dead ends: 2689 [2020-12-22 10:08:31,817 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 10:08:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2020-12-22 10:08:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2687. [2020-12-22 10:08:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2687 states. [2020-12-22 10:08:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4271 transitions. [2020-12-22 10:08:31,927 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4271 transitions. Word has length 79 [2020-12-22 10:08:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:31,927 INFO L481 AbstractCegarLoop]: Abstraction has 2687 states and 4271 transitions. [2020-12-22 10:08:31,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4271 transitions. [2020-12-22 10:08:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:31,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:31,929 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 10:08:31,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:08:31,929 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:31,930 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:08:31,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:31,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501425907] [2020-12-22 10:08:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:32,049 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 10:08:32,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501425907] [2020-12-22 10:08:32,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:32,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805671800] [2020-12-22 10:08:32,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:32,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:32,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:32,052 INFO L87 Difference]: Start difference. First operand 2687 states and 4271 transitions. Second operand 3 states. [2020-12-22 10:08:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:32,189 INFO L93 Difference]: Finished difference Result 4811 states and 7545 transitions. [2020-12-22 10:08:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:32,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:32,209 INFO L225 Difference]: With dead ends: 4811 [2020-12-22 10:08:32,209 INFO L226 Difference]: Without dead ends: 3677 [2020-12-22 10:08:32,213 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 10:08:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2020-12-22 10:08:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3675. [2020-12-22 10:08:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2020-12-22 10:08:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5763 transitions. [2020-12-22 10:08:32,392 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5763 transitions. Word has length 79 [2020-12-22 10:08:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:32,393 INFO L481 AbstractCegarLoop]: Abstraction has 3675 states and 5763 transitions. [2020-12-22 10:08:32,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5763 transitions. [2020-12-22 10:08:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:32,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:32,394 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 10:08:32,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:08:32,395 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:08:32,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:32,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749433744] [2020-12-22 10:08:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:32,481 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 10:08:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749433744] [2020-12-22 10:08:32,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:32,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78473222] [2020-12-22 10:08:32,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:32,486 INFO L87 Difference]: Start difference. First operand 3675 states and 5763 transitions. Second operand 3 states. [2020-12-22 10:08:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:32,736 INFO L93 Difference]: Finished difference Result 7631 states and 11781 transitions. [2020-12-22 10:08:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:32,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:32,778 INFO L225 Difference]: With dead ends: 7631 [2020-12-22 10:08:32,778 INFO L226 Difference]: Without dead ends: 5509 [2020-12-22 10:08:32,784 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 10:08:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2020-12-22 10:08:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 5507. [2020-12-22 10:08:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5507 states. [2020-12-22 10:08:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 8483 transitions. [2020-12-22 10:08:33,107 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 8483 transitions. Word has length 79 [2020-12-22 10:08:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:33,107 INFO L481 AbstractCegarLoop]: Abstraction has 5507 states and 8483 transitions. [2020-12-22 10:08:33,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 8483 transitions. [2020-12-22 10:08:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:08:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:33,109 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 10:08:33,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:08:33,109 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:08:33,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:33,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321991569] [2020-12-22 10:08:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:33,187 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 10:08:33,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321991569] [2020-12-22 10:08:33,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:33,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:08:33,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082872714] [2020-12-22 10:08:33,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:33,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:33,189 INFO L87 Difference]: Start difference. First operand 5507 states and 8483 transitions. Second operand 3 states. [2020-12-22 10:08:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:33,760 INFO L93 Difference]: Finished difference Result 12839 states and 19461 transitions. [2020-12-22 10:08:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:08:33,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:08:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:33,783 INFO L225 Difference]: With dead ends: 12839 [2020-12-22 10:08:33,783 INFO L226 Difference]: Without dead ends: 8885 [2020-12-22 10:08:33,792 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 10:08:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8885 states. [2020-12-22 10:08:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8885 to 8883. [2020-12-22 10:08:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-12-22 10:08:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13395 transitions. [2020-12-22 10:08:34,414 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13395 transitions. Word has length 79 [2020-12-22 10:08:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:34,414 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 13395 transitions. [2020-12-22 10:08:34,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:08:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13395 transitions. [2020-12-22 10:08:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:08:34,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:34,417 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 10:08:34,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:08:34,418 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:08:34,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:34,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660635648] [2020-12-22 10:08:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:34,602 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 10:08:34,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660635648] [2020-12-22 10:08:34,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:34,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376175464] [2020-12-22 10:08:34,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:34,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:34,610 INFO L87 Difference]: Start difference. First operand 8883 states and 13395 transitions. Second operand 8 states. [2020-12-22 10:08:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:35,751 INFO L93 Difference]: Finished difference Result 15218 states and 22538 transitions. [2020-12-22 10:08:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:08:35,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:08:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:35,788 INFO L225 Difference]: With dead ends: 15218 [2020-12-22 10:08:35,788 INFO L226 Difference]: Without dead ends: 15216 [2020-12-22 10:08:35,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:08:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15216 states. [2020-12-22 10:08:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15216 to 9267. [2020-12-22 10:08:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9267 states. [2020-12-22 10:08:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 13747 transitions. [2020-12-22 10:08:36,452 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 13747 transitions. Word has length 80 [2020-12-22 10:08:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:36,452 INFO L481 AbstractCegarLoop]: Abstraction has 9267 states and 13747 transitions. [2020-12-22 10:08:36,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 13747 transitions. [2020-12-22 10:08:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:36,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:36,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:36,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:08:36,463 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2020-12-22 10:08:36,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:36,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169900498] [2020-12-22 10:08:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:08:36,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169900498] [2020-12-22 10:08:36,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:36,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893793071] [2020-12-22 10:08:36,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:36,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:36,642 INFO L87 Difference]: Start difference. First operand 9267 states and 13747 transitions. Second operand 8 states. [2020-12-22 10:08:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:39,381 INFO L93 Difference]: Finished difference Result 57089 states and 83274 transitions. [2020-12-22 10:08:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:39,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:39,500 INFO L225 Difference]: With dead ends: 57089 [2020-12-22 10:08:39,501 INFO L226 Difference]: Without dead ends: 49375 [2020-12-22 10:08:39,528 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 10:08:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49375 states. [2020-12-22 10:08:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49375 to 16979. [2020-12-22 10:08:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16979 states. [2020-12-22 10:08:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 24883 transitions. [2020-12-22 10:08:41,205 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 24883 transitions. Word has length 111 [2020-12-22 10:08:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:41,206 INFO L481 AbstractCegarLoop]: Abstraction has 16979 states and 24883 transitions. [2020-12-22 10:08:41,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 24883 transitions. [2020-12-22 10:08:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:41,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:41,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:41,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:08:41,215 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2020-12-22 10:08:41,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:41,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318866656] [2020-12-22 10:08:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:08:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318866656] [2020-12-22 10:08:41,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977820516] [2020-12-22 10:08:41,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:41,365 INFO L87 Difference]: Start difference. First operand 16979 states and 24883 transitions. Second operand 8 states. [2020-12-22 10:08:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:44,241 INFO L93 Difference]: Finished difference Result 64801 states and 94410 transitions. [2020-12-22 10:08:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:44,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:44,366 INFO L225 Difference]: With dead ends: 64801 [2020-12-22 10:08:44,366 INFO L226 Difference]: Without dead ends: 57087 [2020-12-22 10:08:44,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:08:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57087 states. [2020-12-22 10:08:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57087 to 28563. [2020-12-22 10:08:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28563 states. [2020-12-22 10:08:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28563 states to 28563 states and 41507 transitions. [2020-12-22 10:08:46,547 INFO L78 Accepts]: Start accepts. Automaton has 28563 states and 41507 transitions. Word has length 111 [2020-12-22 10:08:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:46,547 INFO L481 AbstractCegarLoop]: Abstraction has 28563 states and 41507 transitions. [2020-12-22 10:08:46,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 28563 states and 41507 transitions. [2020-12-22 10:08:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:46,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:46,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:46,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:08:46,557 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2020-12-22 10:08:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:46,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558871415] [2020-12-22 10:08:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:08:46,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558871415] [2020-12-22 10:08:46,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:46,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645889664] [2020-12-22 10:08:46,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:46,701 INFO L87 Difference]: Start difference. First operand 28563 states and 41507 transitions. Second operand 8 states. [2020-12-22 10:08:46,864 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 10:08:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:50,357 INFO L93 Difference]: Finished difference Result 72513 states and 105546 transitions. [2020-12-22 10:08:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:50,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:50,448 INFO L225 Difference]: With dead ends: 72513 [2020-12-22 10:08:50,448 INFO L226 Difference]: Without dead ends: 64799 [2020-12-22 10:08:50,468 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 10:08:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64799 states. [2020-12-22 10:08:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64799 to 36275. [2020-12-22 10:08:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36275 states. [2020-12-22 10:08:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36275 states to 36275 states and 52643 transitions. [2020-12-22 10:08:52,961 INFO L78 Accepts]: Start accepts. Automaton has 36275 states and 52643 transitions. Word has length 111 [2020-12-22 10:08:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:52,961 INFO L481 AbstractCegarLoop]: Abstraction has 36275 states and 52643 transitions. [2020-12-22 10:08:52,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:08:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36275 states and 52643 transitions. [2020-12-22 10:08:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:08:52,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:52,970 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:08:52,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:08:52,971 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2020-12-22 10:08:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:52,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686356556] [2020-12-22 10:08:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:08:53,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686356556] [2020-12-22 10:08:53,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:53,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:08:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666379218] [2020-12-22 10:08:53,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:08:53,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:08:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:08:53,120 INFO L87 Difference]: Start difference. First operand 36275 states and 52643 transitions. Second operand 8 states. [2020-12-22 10:08:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:57,603 INFO L93 Difference]: Finished difference Result 80225 states and 116682 transitions. [2020-12-22 10:08:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:08:57,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:08:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:57,680 INFO L225 Difference]: With dead ends: 80225 [2020-12-22 10:08:57,680 INFO L226 Difference]: Without dead ends: 72511 [2020-12-22 10:08:57,704 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 10:08:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72511 states. [2020-12-22 10:09:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72511 to 43987. [2020-12-22 10:09:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43987 states. [2020-12-22 10:09:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43987 states to 43987 states and 63779 transitions. [2020-12-22 10:09:00,992 INFO L78 Accepts]: Start accepts. Automaton has 43987 states and 63779 transitions. Word has length 111 [2020-12-22 10:09:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:00,992 INFO L481 AbstractCegarLoop]: Abstraction has 43987 states and 63779 transitions. [2020-12-22 10:09:00,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43987 states and 63779 transitions. [2020-12-22 10:09:01,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:01,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:01,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:01,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:09:01,002 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2020-12-22 10:09:01,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:01,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803613841] [2020-12-22 10:09:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:09:01,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803613841] [2020-12-22 10:09:01,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:01,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:01,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215878860] [2020-12-22 10:09:01,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:01,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:01,164 INFO L87 Difference]: Start difference. First operand 43987 states and 63779 transitions. Second operand 8 states. [2020-12-22 10:09:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:06,719 INFO L93 Difference]: Finished difference Result 87937 states and 127818 transitions. [2020-12-22 10:09:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:06,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:06,803 INFO L225 Difference]: With dead ends: 87937 [2020-12-22 10:09:06,803 INFO L226 Difference]: Without dead ends: 80223 [2020-12-22 10:09:06,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80223 states. [2020-12-22 10:09:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80223 to 51699. [2020-12-22 10:09:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51699 states. [2020-12-22 10:09:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51699 states to 51699 states and 74915 transitions. [2020-12-22 10:09:10,853 INFO L78 Accepts]: Start accepts. Automaton has 51699 states and 74915 transitions. Word has length 111 [2020-12-22 10:09:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:10,854 INFO L481 AbstractCegarLoop]: Abstraction has 51699 states and 74915 transitions. [2020-12-22 10:09:10,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 51699 states and 74915 transitions. [2020-12-22 10:09:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:10,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:10,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:10,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:09:10,863 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2020-12-22 10:09:10,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:10,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378665559] [2020-12-22 10:09:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:09:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378665559] [2020-12-22 10:09:11,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:11,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539626730] [2020-12-22 10:09:11,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:11,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:11,024 INFO L87 Difference]: Start difference. First operand 51699 states and 74915 transitions. Second operand 8 states. [2020-12-22 10:09:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:17,537 INFO L93 Difference]: Finished difference Result 90977 states and 132234 transitions. [2020-12-22 10:09:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:17,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:17,622 INFO L225 Difference]: With dead ends: 90977 [2020-12-22 10:09:17,622 INFO L226 Difference]: Without dead ends: 85599 [2020-12-22 10:09:17,641 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 10:09:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85599 states. [2020-12-22 10:09:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85599 to 57075. [2020-12-22 10:09:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57075 states. [2020-12-22 10:09:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57075 states to 57075 states and 82723 transitions. [2020-12-22 10:09:21,765 INFO L78 Accepts]: Start accepts. Automaton has 57075 states and 82723 transitions. Word has length 111 [2020-12-22 10:09:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:21,765 INFO L481 AbstractCegarLoop]: Abstraction has 57075 states and 82723 transitions. [2020-12-22 10:09:21,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 57075 states and 82723 transitions. [2020-12-22 10:09:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:21,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:21,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:21,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:09:21,775 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1181155843, now seen corresponding path program 1 times [2020-12-22 10:09:21,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:21,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440902892] [2020-12-22 10:09:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440902892] [2020-12-22 10:09:21,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:21,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:21,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59224176] [2020-12-22 10:09:21,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:21,857 INFO L87 Difference]: Start difference. First operand 57075 states and 82723 transitions. Second operand 3 states. [2020-12-22 10:09:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:26,233 INFO L93 Difference]: Finished difference Result 112599 states and 162933 transitions. [2020-12-22 10:09:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:26,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:26,304 INFO L225 Difference]: With dead ends: 112599 [2020-12-22 10:09:26,305 INFO L226 Difference]: Without dead ends: 57077 [2020-12-22 10:09:26,339 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 10:09:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57077 states. [2020-12-22 10:09:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57077 to 57075. [2020-12-22 10:09:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57075 states. [2020-12-22 10:09:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57075 states to 57075 states and 82035 transitions. [2020-12-22 10:09:30,800 INFO L78 Accepts]: Start accepts. Automaton has 57075 states and 82035 transitions. Word has length 112 [2020-12-22 10:09:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:30,800 INFO L481 AbstractCegarLoop]: Abstraction has 57075 states and 82035 transitions. [2020-12-22 10:09:30,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:30,801 INFO L276 IsEmpty]: Start isEmpty. Operand 57075 states and 82035 transitions. [2020-12-22 10:09:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:30,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:30,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:30,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:09:30,808 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash -734589639, now seen corresponding path program 1 times [2020-12-22 10:09:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:30,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819720717] [2020-12-22 10:09:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:30,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819720717] [2020-12-22 10:09:30,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:30,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225467853] [2020-12-22 10:09:30,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:30,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:30,882 INFO L87 Difference]: Start difference. First operand 57075 states and 82035 transitions. Second operand 3 states. [2020-12-22 10:09:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:33,079 INFO L93 Difference]: Finished difference Result 84839 states and 121797 transitions. [2020-12-22 10:09:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:33,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:33,111 INFO L225 Difference]: With dead ends: 84839 [2020-12-22 10:09:33,111 INFO L226 Difference]: Without dead ends: 29317 [2020-12-22 10:09:33,136 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 10:09:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29317 states. [2020-12-22 10:09:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29317 to 29315. [2020-12-22 10:09:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29315 states. [2020-12-22 10:09:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29315 states to 29315 states and 41931 transitions. [2020-12-22 10:09:35,398 INFO L78 Accepts]: Start accepts. Automaton has 29315 states and 41931 transitions. Word has length 112 [2020-12-22 10:09:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:35,398 INFO L481 AbstractCegarLoop]: Abstraction has 29315 states and 41931 transitions. [2020-12-22 10:09:35,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29315 states and 41931 transitions. [2020-12-22 10:09:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:35,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:35,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:35,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:09:35,402 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1644766063, now seen corresponding path program 1 times [2020-12-22 10:09:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:35,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575778841] [2020-12-22 10:09:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:35,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575778841] [2020-12-22 10:09:35,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:35,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958870218] [2020-12-22 10:09:35,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:35,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:35,471 INFO L87 Difference]: Start difference. First operand 29315 states and 41931 transitions. Second operand 3 states. [2020-12-22 10:09:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:36,867 INFO L93 Difference]: Finished difference Result 43199 states and 61641 transitions. [2020-12-22 10:09:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:36,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:36,885 INFO L225 Difference]: With dead ends: 43199 [2020-12-22 10:09:36,885 INFO L226 Difference]: Without dead ends: 15437 [2020-12-22 10:09:36,898 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 10:09:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15437 states. [2020-12-22 10:09:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15437 to 15435. [2020-12-22 10:09:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15435 states. [2020-12-22 10:09:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15435 states to 15435 states and 22051 transitions. [2020-12-22 10:09:38,000 INFO L78 Accepts]: Start accepts. Automaton has 15435 states and 22051 transitions. Word has length 112 [2020-12-22 10:09:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:38,000 INFO L481 AbstractCegarLoop]: Abstraction has 15435 states and 22051 transitions. [2020-12-22 10:09:38,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 15435 states and 22051 transitions. [2020-12-22 10:09:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:38,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:38,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:38,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:09:38,004 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:38,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1063598939, now seen corresponding path program 1 times [2020-12-22 10:09:38,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:38,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158236275] [2020-12-22 10:09:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:38,082 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 10:09:38,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158236275] [2020-12-22 10:09:38,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:38,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:38,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256339020] [2020-12-22 10:09:38,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:38,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:38,088 INFO L87 Difference]: Start difference. First operand 15435 states and 22051 transitions. Second operand 3 states. [2020-12-22 10:09:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:38,679 INFO L93 Difference]: Finished difference Result 22379 states and 31821 transitions. [2020-12-22 10:09:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:38,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:09:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:38,697 INFO L225 Difference]: With dead ends: 22379 [2020-12-22 10:09:38,697 INFO L226 Difference]: Without dead ends: 8497 [2020-12-22 10:09:38,708 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 10:09:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2020-12-22 10:09:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 8495. [2020-12-22 10:09:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8495 states. [2020-12-22 10:09:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8495 states to 8495 states and 12197 transitions. [2020-12-22 10:09:39,454 INFO L78 Accepts]: Start accepts. Automaton has 8495 states and 12197 transitions. Word has length 112 [2020-12-22 10:09:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:39,454 INFO L481 AbstractCegarLoop]: Abstraction has 8495 states and 12197 transitions. [2020-12-22 10:09:39,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8495 states and 12197 transitions. [2020-12-22 10:09:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:39,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:39,456 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] [2020-12-22 10:09:39,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:09:39,457 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:39,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1150717733, now seen corresponding path program 1 times [2020-12-22 10:09:39,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:39,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851329381] [2020-12-22 10:09:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:39,839 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 10:09:39,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851329381] [2020-12-22 10:09:39,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596653706] [2020-12-22 10:09:39,840 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 10:09:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:09:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:40,489 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 10:09:40,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:09:40,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:09:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795848599] [2020-12-22 10:09:40,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:09:40,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:09:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:09:40,492 INFO L87 Difference]: Start difference. First operand 8495 states and 12197 transitions. Second operand 16 states. [2020-12-22 10:09:44,062 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:09:44,500 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:09:44,792 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 10:09:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:49,841 INFO L93 Difference]: Finished difference Result 54691 states and 75554 transitions. [2020-12-22 10:09:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 10:09:49,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-12-22 10:09:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:49,978 INFO L225 Difference]: With dead ends: 54691 [2020-12-22 10:09:49,978 INFO L226 Difference]: Without dead ends: 47749 [2020-12-22 10:09:49,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=944, Invalid=4606, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 10:09:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47749 states. [2020-12-22 10:09:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47749 to 30957. [2020-12-22 10:09:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30957 states. [2020-12-22 10:09:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30957 states to 30957 states and 42807 transitions. [2020-12-22 10:09:53,380 INFO L78 Accepts]: Start accepts. Automaton has 30957 states and 42807 transitions. Word has length 112 [2020-12-22 10:09:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 30957 states and 42807 transitions. [2020-12-22 10:09:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:09:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 30957 states and 42807 transitions. [2020-12-22 10:09:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:09:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:53,385 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 10:09:53,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:09:53,600 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 192689075, now seen corresponding path program 1 times [2020-12-22 10:09:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:53,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827839363] [2020-12-22 10:09:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:53,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827839363] [2020-12-22 10:09:53,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849461584] [2020-12-22 10:09:53,864 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 10:09:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:09:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:09:54,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:09:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:54,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:09:54,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:09:54,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957516602] [2020-12-22 10:09:54,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:09:54,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:09:54,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:09:54,571 INFO L87 Difference]: Start difference. First operand 30957 states and 42807 transitions. Second operand 17 states. [2020-12-22 10:10:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:07,170 INFO L93 Difference]: Finished difference Result 128991 states and 175102 transitions. [2020-12-22 10:10:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:10:07,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2020-12-22 10:10:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:07,337 INFO L225 Difference]: With dead ends: 128991 [2020-12-22 10:10:07,337 INFO L226 Difference]: Without dead ends: 107722 [2020-12-22 10:10:07,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:10:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107722 states. [2020-12-22 10:10:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107722 to 63099. [2020-12-22 10:10:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63099 states. [2020-12-22 10:10:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63099 states to 63099 states and 86494 transitions. [2020-12-22 10:10:14,644 INFO L78 Accepts]: Start accepts. Automaton has 63099 states and 86494 transitions. Word has length 113 [2020-12-22 10:10:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:14,645 INFO L481 AbstractCegarLoop]: Abstraction has 63099 states and 86494 transitions. [2020-12-22 10:10:14,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:10:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63099 states and 86494 transitions. [2020-12-22 10:10:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:10:14,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:14,648 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 10:10:14,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:10:14,864 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2123021299, now seen corresponding path program 1 times [2020-12-22 10:10:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711211518] [2020-12-22 10:10:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711211518] [2020-12-22 10:10:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336553520] [2020-12-22 10:10:15,285 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 10:10:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:10:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:15,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:16,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:16,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:10:16,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623665410] [2020-12-22 10:10:16,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:10:16,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:10:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:10:16,009 INFO L87 Difference]: Start difference. First operand 63099 states and 86494 transitions. Second operand 22 states. [2020-12-22 10:10:16,578 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:18,366 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:18,720 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:20,672 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:22,413 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:22,804 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:24,634 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:24,790 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:10:25,237 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:10:25,407 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:10:25,547 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:10:25,677 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:10:26,489 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 10:10:26,990 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:10:27,367 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:10:27,671 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:28,847 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:29,670 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 10:10:29,896 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 10:10:30,090 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 10:10:30,358 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 10:11:02,942 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:10,639 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:10,775 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:11:12,709 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:12,857 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:11:13,118 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:11:14,988 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46