/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:22:19,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:22:19,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:22:19,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:22:19,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:22:19,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:22:19,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:22:19,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:22:19,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:22:19,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:22:19,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:22:19,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:22:19,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:22:19,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:22:19,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:22:19,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:22:19,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:22:19,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:22:19,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:22:19,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:22:19,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:22:19,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:22:19,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:22:19,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:22:19,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:22:19,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:22:19,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:22:19,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:22:19,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:22:19,391 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:22:19,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:22:19,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:22:19,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:22:19,393 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:22:19,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:22:19,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:22:19,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:22:19,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:22:19,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:22:19,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:22:19,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:22:19,397 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:22:19,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:22:19,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:22:19,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:22:19,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:22:19,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:22:19,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:22:19,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:22:19,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:22:19,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:22:19,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:22:19,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:22:19,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:22:19,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:22:19,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:22:19,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:22:19,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:22:19,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:22:19,883 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:22:19,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:22:19,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819b484bd/856ef6a1043a4b34bedd070f479924c1/FLAG56b1e62f3 [2020-12-22 10:22:21,033 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:22:21,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:22:21,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819b484bd/856ef6a1043a4b34bedd070f479924c1/FLAG56b1e62f3 [2020-12-22 10:22:21,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/819b484bd/856ef6a1043a4b34bedd070f479924c1 [2020-12-22 10:22:21,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:22:21,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:22:21,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:21,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:22:21,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:22:21,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:21" (1/1) ... [2020-12-22 10:22:21,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a5341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:21, skipping insertion in model container [2020-12-22 10:22:21,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:22:21" (1/1) ... [2020-12-22 10:22:21,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:22:21,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:22:22,124 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c[26847,26860] [2020-12-22 10:22:22,219 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c[33665,33678] [2020-12-22 10:22:23,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:23,148 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:22:23,251 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c[26847,26860] [2020-12-22 10:22:23,266 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c[33665,33678] [2020-12-22 10:22:23,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:22:23,977 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:22:23,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23 WrapperNode [2020-12-22 10:22:23,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:22:23,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:23,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:22:23,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:22:23,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:22:24,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:22:24,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:22:24,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:22:24,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:24,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:25,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... [2020-12-22 10:22:25,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:22:25,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:22:25,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:22:25,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:22:25,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:22:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:22:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:22:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:22:25,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:22:30,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:22:30,688 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:22:30,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:30 BoogieIcfgContainer [2020-12-22 10:22:30,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:22:30,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:22:30,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:22:30,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:22:30,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:22:21" (1/3) ... [2020-12-22 10:22:30,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de7b0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:30, skipping insertion in model container [2020-12-22 10:22:30,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:22:23" (2/3) ... [2020-12-22 10:22:30,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de7b0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:30, skipping insertion in model container [2020-12-22 10:22:30,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:30" (3/3) ... [2020-12-22 10:22:30,700 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:22:30,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:22:30,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:22:30,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:22:30,768 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:22:30,768 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:22:30,769 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:22:30,769 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:22:30,769 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:22:30,769 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:22:30,769 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:22:30,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:22:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:22:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:22:30,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:30,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:30,816 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:22:30,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:30,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172453520] [2020-12-22 10:22:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:31,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172453520] [2020-12-22 10:22:31,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:22:31,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697672644] [2020-12-22 10:22:31,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:22:31,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:22:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:22:31,118 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:22:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:31,205 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:22:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:22:31,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:22:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:31,244 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:22:31,244 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:22:31,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:22:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:22:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:22:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:22:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:22:31,377 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:22:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:22:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:22:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:22:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:22:31,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:31,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:31,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:22:31,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:22:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:31,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566029284] [2020-12-22 10:22:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:31,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566029284] [2020-12-22 10:22:31,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:31,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:22:31,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803790082] [2020-12-22 10:22:31,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:22:31,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:22:31,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:31,546 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:22:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:31,767 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:22:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:22:31,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:22:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:31,774 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:22:31,774 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:22:31,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:22:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:22:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:22:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:22:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:22:31,821 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:22:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:31,822 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:22:31,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:22:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:22:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:22:31,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:31,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:31,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:22:31,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -430057188, now seen corresponding path program 1 times [2020-12-22 10:22:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:31,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149767111] [2020-12-22 10:22:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:32,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149767111] [2020-12-22 10:22:32,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:32,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:32,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524455373] [2020-12-22 10:22:32,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:22:32,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:22:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:32,126 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:22:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:43,491 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:22:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:43,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 10:22:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:43,507 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:22:43,508 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:22:43,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:22:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:22:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:22:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3603 transitions. [2020-12-22 10:22:43,577 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3603 transitions. Word has length 61 [2020-12-22 10:22:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:43,578 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3603 transitions. [2020-12-22 10:22:43,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3603 transitions. [2020-12-22 10:22:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:43,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:43,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:43,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:22:43,581 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:22:43,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:43,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545279468] [2020-12-22 10:22:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:43,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545279468] [2020-12-22 10:22:43,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:43,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:43,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993637183] [2020-12-22 10:22:43,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:43,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:43,835 INFO L87 Difference]: Start difference. First operand 2399 states and 3603 transitions. Second operand 3 states. [2020-12-22 10:22:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:43,895 INFO L93 Difference]: Finished difference Result 2545 states and 3835 transitions. [2020-12-22 10:22:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:43,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:43,913 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:22:43,913 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:22:43,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:22:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:22:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:22:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3712 transitions. [2020-12-22 10:22:43,982 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3712 transitions. Word has length 106 [2020-12-22 10:22:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:43,983 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3712 transitions. [2020-12-22 10:22:43,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3712 transitions. [2020-12-22 10:22:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:43,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:43,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:43,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:22:43,986 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:22:43,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:43,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563677402] [2020-12-22 10:22:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563677402] [2020-12-22 10:22:44,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:44,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633761028] [2020-12-22 10:22:44,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:44,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,157 INFO L87 Difference]: Start difference. First operand 2467 states and 3712 transitions. Second operand 3 states. [2020-12-22 10:22:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,233 INFO L93 Difference]: Finished difference Result 2743 states and 4152 transitions. [2020-12-22 10:22:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:44,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,252 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:22:44,252 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:22:44,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:22:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:22:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:22:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3919 transitions. [2020-12-22 10:22:44,332 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3919 transitions. Word has length 106 [2020-12-22 10:22:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 3919 transitions. [2020-12-22 10:22:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3919 transitions. [2020-12-22 10:22:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:44,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:44,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:44,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:22:44,344 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:22:44,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:44,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710055028] [2020-12-22 10:22:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:44,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710055028] [2020-12-22 10:22:44,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:44,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205864864] [2020-12-22 10:22:44,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:44,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,496 INFO L87 Difference]: Start difference. First operand 2597 states and 3919 transitions. Second operand 3 states. [2020-12-22 10:22:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,571 INFO L93 Difference]: Finished difference Result 3121 states and 4753 transitions. [2020-12-22 10:22:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:44,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,592 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:22:44,593 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:22:44,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:22:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:22:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:22:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4311 transitions. [2020-12-22 10:22:44,693 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4311 transitions. Word has length 106 [2020-12-22 10:22:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:44,695 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4311 transitions. [2020-12-22 10:22:44,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4311 transitions. [2020-12-22 10:22:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:44,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:44,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:44,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:22:44,698 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:22:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:44,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402483850] [2020-12-22 10:22:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:44,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402483850] [2020-12-22 10:22:44,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337542037] [2020-12-22 10:22:44,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:44,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,870 INFO L87 Difference]: Start difference. First operand 2845 states and 4311 transitions. Second operand 3 states. [2020-12-22 10:22:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:44,952 INFO L93 Difference]: Finished difference Result 3841 states and 5889 transitions. [2020-12-22 10:22:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:44,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:44,974 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:22:44,974 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:22:44,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:22:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:22:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:22:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5051 transitions. [2020-12-22 10:22:45,087 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5051 transitions. Word has length 106 [2020-12-22 10:22:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:45,087 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5051 transitions. [2020-12-22 10:22:45,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5051 transitions. [2020-12-22 10:22:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:45,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:45,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:45,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:22:45,090 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:22:45,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:45,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021145150] [2020-12-22 10:22:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:45,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021145150] [2020-12-22 10:22:45,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:45,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:45,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764929837] [2020-12-22 10:22:45,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:45,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:45,303 INFO L87 Difference]: Start difference. First operand 3317 states and 5051 transitions. Second operand 10 states. [2020-12-22 10:22:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:46,547 INFO L93 Difference]: Finished difference Result 19221 states and 30155 transitions. [2020-12-22 10:22:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:22:46,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:22:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:46,641 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:22:46,641 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:22:46,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:22:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:22:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:22:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:22:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6587 transitions. [2020-12-22 10:22:47,034 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6587 transitions. Word has length 106 [2020-12-22 10:22:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:47,034 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6587 transitions. [2020-12-22 10:22:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6587 transitions. [2020-12-22 10:22:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:47,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:47,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:47,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:22:47,037 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:22:47,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:47,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330730268] [2020-12-22 10:22:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330730268] [2020-12-22 10:22:47,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:47,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:47,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007271845] [2020-12-22 10:22:47,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:47,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:47,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:47,143 INFO L87 Difference]: Start difference. First operand 4309 states and 6587 transitions. Second operand 3 states. [2020-12-22 10:22:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:47,378 INFO L93 Difference]: Finished difference Result 7251 states and 11183 transitions. [2020-12-22 10:22:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:47,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:47,393 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:22:47,393 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:47,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:22:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:22:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:22:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8053 transitions. [2020-12-22 10:22:47,668 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8053 transitions. Word has length 108 [2020-12-22 10:22:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:47,669 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8053 transitions. [2020-12-22 10:22:47,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8053 transitions. [2020-12-22 10:22:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:47,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:47,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:47,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:22:47,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:22:47,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:47,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924098010] [2020-12-22 10:22:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:48,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924098010] [2020-12-22 10:22:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493238196] [2020-12-22 10:22:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:48,247 INFO L87 Difference]: Start difference. First operand 5263 states and 8053 transitions. Second operand 10 states. [2020-12-22 10:22:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:49,046 INFO L93 Difference]: Finished difference Result 8203 states and 12623 transitions. [2020-12-22 10:22:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:49,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:22:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:49,059 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:22:49,059 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:22:49,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:22:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:22:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:22:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:22:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8029 transitions. [2020-12-22 10:22:49,332 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8029 transitions. Word has length 108 [2020-12-22 10:22:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:49,333 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8029 transitions. [2020-12-22 10:22:49,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8029 transitions. [2020-12-22 10:22:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:49,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:49,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:49,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:22:49,335 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:22:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239116762] [2020-12-22 10:22:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:49,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239116762] [2020-12-22 10:22:49,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:49,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:49,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819341356] [2020-12-22 10:22:49,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:49,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:49,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:49,430 INFO L87 Difference]: Start difference. First operand 5263 states and 8029 transitions. Second operand 3 states. [2020-12-22 10:22:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:49,883 INFO L93 Difference]: Finished difference Result 10851 states and 16639 transitions. [2020-12-22 10:22:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:49,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:49,913 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:22:49,913 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:22:49,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:22:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:22:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:22:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12045 transitions. [2020-12-22 10:22:50,637 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12045 transitions. Word has length 108 [2020-12-22 10:22:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:50,637 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12045 transitions. [2020-12-22 10:22:50,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12045 transitions. [2020-12-22 10:22:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:50,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:50,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:50,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:22:50,640 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:22:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:50,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308964508] [2020-12-22 10:22:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:50,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308964508] [2020-12-22 10:22:50,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:50,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079050393] [2020-12-22 10:22:50,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:50,748 INFO L87 Difference]: Start difference. First operand 7911 states and 12045 transitions. Second operand 3 states. [2020-12-22 10:22:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:51,457 INFO L93 Difference]: Finished difference Result 18507 states and 28207 transitions. [2020-12-22 10:22:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:51,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:51,487 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:22:51,487 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:22:51,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:22:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:22:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:22:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19549 transitions. [2020-12-22 10:22:52,422 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19549 transitions. Word has length 108 [2020-12-22 10:22:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:52,422 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19549 transitions. [2020-12-22 10:22:52,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19549 transitions. [2020-12-22 10:22:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:52,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:52,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:52,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:22:52,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:22:52,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:52,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813114124] [2020-12-22 10:22:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813114124] [2020-12-22 10:22:52,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:52,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968767315] [2020-12-22 10:22:52,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:52,533 INFO L87 Difference]: Start difference. First operand 12919 states and 19549 transitions. Second operand 3 states. [2020-12-22 10:22:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:53,833 INFO L93 Difference]: Finished difference Result 32955 states and 49759 transitions. [2020-12-22 10:22:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:53,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:53,888 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:22:53,888 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:22:53,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:22:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:22:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:22:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33501 transitions. [2020-12-22 10:22:55,534 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33501 transitions. Word has length 108 [2020-12-22 10:22:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:55,534 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33501 transitions. [2020-12-22 10:22:55,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33501 transitions. [2020-12-22 10:22:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:55,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:55,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:55,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:22:55,537 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:22:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:55,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365500647] [2020-12-22 10:22:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:55,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365500647] [2020-12-22 10:22:55,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:55,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909841398] [2020-12-22 10:22:55,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:55,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:55,627 INFO L87 Difference]: Start difference. First operand 22359 states and 33501 transitions. Second operand 3 states. [2020-12-22 10:22:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:57,854 INFO L93 Difference]: Finished difference Result 60123 states and 89695 transitions. [2020-12-22 10:22:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:57,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:57,949 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:22:57,949 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:22:57,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:23:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:23:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:23:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59293 transitions. [2020-12-22 10:23:00,445 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59293 transitions. Word has length 108 [2020-12-22 10:23:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:00,445 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59293 transitions. [2020-12-22 10:23:00,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:23:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59293 transitions. [2020-12-22 10:23:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:23:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:00,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:00,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:23:00,447 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:23:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:00,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448323656] [2020-12-22 10:23:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:00,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448323656] [2020-12-22 10:23:00,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:00,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:23:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49175110] [2020-12-22 10:23:00,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:23:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:23:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:23:00,579 INFO L87 Difference]: Start difference. First operand 40087 states and 59293 transitions. Second operand 8 states. [2020-12-22 10:23:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:05,599 INFO L93 Difference]: Finished difference Result 72254 states and 105870 transitions. [2020-12-22 10:23:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:05,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:23:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:05,740 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:23:05,740 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:23:05,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:23:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:23:09,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:23:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:23:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60701 transitions. [2020-12-22 10:23:09,178 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60701 transitions. Word has length 109 [2020-12-22 10:23:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:09,179 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60701 transitions. [2020-12-22 10:23:09,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:23:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60701 transitions. [2020-12-22 10:23:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:23:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:09,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:09,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:23:09,183 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash -237805515, now seen corresponding path program 1 times [2020-12-22 10:23:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:09,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214927667] [2020-12-22 10:23:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:23:09,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214927667] [2020-12-22 10:23:09,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:09,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:23:09,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238908675] [2020-12-22 10:23:09,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:23:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:23:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:09,461 INFO L87 Difference]: Start difference. First operand 41623 states and 60701 transitions. Second operand 4 states. [2020-12-22 10:23:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:19,841 INFO L93 Difference]: Finished difference Result 45417 states and 66806 transitions. [2020-12-22 10:23:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:23:19,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 10:23:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:19,882 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:23:19,883 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:23:19,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:23:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:23:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:23:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:23:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62286 transitions. [2020-12-22 10:23:22,551 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62286 transitions. Word has length 132 [2020-12-22 10:23:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:22,552 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62286 transitions. [2020-12-22 10:23:22,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:23:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62286 transitions. [2020-12-22 10:23:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:22,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:22,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:22,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:23:22,575 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:22,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:23:22,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:22,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912641124] [2020-12-22 10:23:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:23:22,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912641124] [2020-12-22 10:23:22,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:22,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:22,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675964903] [2020-12-22 10:23:22,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:22,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:22,809 INFO L87 Difference]: Start difference. First operand 43125 states and 62286 transitions. Second operand 10 states. [2020-12-22 10:23:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:41,998 INFO L93 Difference]: Finished difference Result 365063 states and 530583 transitions. [2020-12-22 10:23:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:41,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:42,712 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:23:42,713 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:23:42,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:23:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:23:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:23:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119118 transitions. [2020-12-22 10:23:50,918 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119118 transitions. Word has length 149 [2020-12-22 10:23:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:50,918 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119118 transitions. [2020-12-22 10:23:50,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119118 transitions. [2020-12-22 10:23:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:50,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:50,948 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:23:50,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:50,948 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:23:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:50,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809657080] [2020-12-22 10:23:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:23:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809657080] [2020-12-22 10:23:51,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:51,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:51,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736782454] [2020-12-22 10:23:51,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:51,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:51,241 INFO L87 Difference]: Start difference. First operand 82421 states and 119118 transitions. Second operand 10 states. [2020-12-22 10:24:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:15,762 INFO L93 Difference]: Finished difference Result 404359 states and 587415 transitions. [2020-12-22 10:24:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:15,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:16,530 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:24:16,531 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:24:16,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:24:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:24:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:24:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 204046 transitions. [2020-12-22 10:24:29,685 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 204046 transitions. Word has length 149 [2020-12-22 10:24:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:29,686 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 204046 transitions. [2020-12-22 10:24:29,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 204046 transitions. [2020-12-22 10:24:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:29,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:29,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:24:29,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:24:29,743 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:24:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:29,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240273091] [2020-12-22 10:24:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:24:29,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240273091] [2020-12-22 10:24:29,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:29,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054337504] [2020-12-22 10:24:29,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:29,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:29,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:29,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:29,989 INFO L87 Difference]: Start difference. First operand 141429 states and 204046 transitions. Second operand 10 states. [2020-12-22 10:24:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:59,303 INFO L93 Difference]: Finished difference Result 443655 states and 644247 transitions. [2020-12-22 10:24:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:59,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:00,164 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:25:00,165 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:25:00,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:25:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:25:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states. [2020-12-22 10:25:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180725 states to 180725 states and 260878 transitions. [2020-12-22 10:25:17,013 INFO L78 Accepts]: Start accepts. Automaton has 180725 states and 260878 transitions. Word has length 149 [2020-12-22 10:25:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:25:17,014 INFO L481 AbstractCegarLoop]: Abstraction has 180725 states and 260878 transitions. [2020-12-22 10:25:17,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:25:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 180725 states and 260878 transitions. [2020-12-22 10:25:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:25:17,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:25:17,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:25:17,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:25:17,050 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:25:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:25:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:25:17,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:25:17,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951013975] [2020-12-22 10:25:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:25:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:25:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:25:17,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951013975] [2020-12-22 10:25:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:25:17,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:25:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599814794] [2020-12-22 10:25:17,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:25:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:25:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:25:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:25:17,290 INFO L87 Difference]: Start difference. First operand 180725 states and 260878 transitions. Second operand 10 states.