/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.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:44,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:44,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:44,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:44,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:44,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:44,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:44,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:44,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:44,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:44,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:44,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:44,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:44,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:44,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:44,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:44,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:44,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:44,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:44,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:44,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:44,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:44,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:44,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:44,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:44,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:44,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:44,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:44,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:44,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:44,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:44,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:44,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:44,615 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:44,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:44,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:44,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:44,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:44,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:44,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:44,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:44,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:44,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:44,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:44,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:44,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:44,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:44,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:44,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:44,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:44,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:44,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:44,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:44,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:44,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:45,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:45,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:45,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:45,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:45,166 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:45,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:52:45,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a389bc981/5108e46c7fb54cf4bfb957bebac92652/FLAG1ddc6ccc7 [2020-12-22 09:52:46,390 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:46,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:52:46,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a389bc981/5108e46c7fb54cf4bfb957bebac92652/FLAG1ddc6ccc7 [2020-12-22 09:52:46,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a389bc981/5108e46c7fb54cf4bfb957bebac92652 [2020-12-22 09:52:46,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:46,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:46,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:46,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:46,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:46,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:46" (1/1) ... [2020-12-22 09:52:46,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d24ee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:46, skipping insertion in model container [2020-12-22 09:52:46,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:46" (1/1) ... [2020-12-22 09:52:46,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:47,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:47,558 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.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[11795,11808] [2020-12-22 09:52:47,671 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.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[18488,18501] [2020-12-22 09:52:48,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:48,818 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:52:48,947 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.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[11795,11808] [2020-12-22 09:52:48,995 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.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[18488,18501] [2020-12-22 09:52:49,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:49,764 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:52:49,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49 WrapperNode [2020-12-22 09:52:49,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:49,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:49,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:52:49,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:52:49,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:49,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:50,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:52:50,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:52:50,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:52:50,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:50,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (1/1) ... [2020-12-22 09:52:51,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:51,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:51,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:51,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:51,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (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 09:52:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:51,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:56,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:56,797 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:56,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:56 BoogieIcfgContainer [2020-12-22 09:52:56,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:56,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:56,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:56,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:56,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:46" (1/3) ... [2020-12-22 09:52:56,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40559622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:56, skipping insertion in model container [2020-12-22 09:52:56,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:49" (2/3) ... [2020-12-22 09:52:56,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40559622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:56, skipping insertion in model container [2020-12-22 09:52:56,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:56" (3/3) ... [2020-12-22 09:52:56,810 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:52:56,817 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:56,823 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:56,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:56,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:56,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:56,876 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:56,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:56,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:56,877 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:56,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:56,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:52:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:56,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:56,921 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] [2020-12-22 09:52:56,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:52:56,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:56,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758273518] [2020-12-22 09:52:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:57,180 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 09:52:57,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758273518] [2020-12-22 09:52:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:57,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4604469] [2020-12-22 09:52:57,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:57,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:57,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:57,217 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:52:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:57,321 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:52:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:57,323 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:57,357 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:57,358 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:57,369 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 09:52:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:52:57,501 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:52:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:57,502 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:52:57,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:52:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:57,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:57,506 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] [2020-12-22 09:52:57,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:57,507 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:52:57,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:57,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348692507] [2020-12-22 09:52:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:57,720 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 09:52:57,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348692507] [2020-12-22 09:52:57,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334474778] [2020-12-22 09:52:57,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:57,725 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:52:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:57,920 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:52:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:57,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:57,926 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:52:57,927 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:57,928 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 09:52:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:52:57,953 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:52:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:57,953 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:52:57,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:52:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:52:57,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:57,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:57,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:57,957 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash -445282779, now seen corresponding path program 1 times [2020-12-22 09:52:57,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:57,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927479702] [2020-12-22 09:52:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:58,222 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 09:52:58,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927479702] [2020-12-22 09:52:58,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:58,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:58,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114409285] [2020-12-22 09:52:58,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:52:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:52:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:52:58,225 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 4 states. [2020-12-22 09:53:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,247 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2020-12-22 09:53:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:53:10,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:53:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,267 INFO L225 Difference]: With dead ends: 3099 [2020-12-22 09:53:10,267 INFO L226 Difference]: Without dead ends: 2346 [2020-12-22 09:53:10,270 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 09:53:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-12-22 09:53:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2020-12-22 09:53:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-12-22 09:53:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2020-12-22 09:53:10,344 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 60 [2020-12-22 09:53:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:10,345 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2020-12-22 09:53:10,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:53:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2020-12-22 09:53:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:10,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:10,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:10,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:53:10,348 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:53:10,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:10,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639916842] [2020-12-22 09:53:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,532 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 09:53:10,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639916842] [2020-12-22 09:53:10,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:10,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:10,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155662513] [2020-12-22 09:53:10,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:10,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:10,537 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand 3 states. [2020-12-22 09:53:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,611 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2020-12-22 09:53:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:10,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:53:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,628 INFO L225 Difference]: With dead ends: 2446 [2020-12-22 09:53:10,628 INFO L226 Difference]: Without dead ends: 2393 [2020-12-22 09:53:10,630 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 09:53:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2020-12-22 09:53:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2020-12-22 09:53:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-12-22 09:53:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2020-12-22 09:53:10,711 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2020-12-22 09:53:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:10,712 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2020-12-22 09:53:10,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2020-12-22 09:53:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:53:10,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:10,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:10,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:53:10,718 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:53:10,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:10,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501218772] [2020-12-22 09:53:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,938 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 09:53:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501218772] [2020-12-22 09:53:10,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:10,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:10,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51726902] [2020-12-22 09:53:10,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:10,941 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand 7 states. [2020-12-22 09:53:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:11,297 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2020-12-22 09:53:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:53:11,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:53:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:11,320 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:53:11,320 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:53:11,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:53:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:53:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2020-12-22 09:53:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-12-22 09:53:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2020-12-22 09:53:11,422 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2020-12-22 09:53:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:11,424 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2020-12-22 09:53:11,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2020-12-22 09:53:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:11,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:11,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:11,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:53:11,426 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:53:11,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:11,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768669558] [2020-12-22 09:53:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:11,575 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 09:53:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768669558] [2020-12-22 09:53:11,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:11,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070486403] [2020-12-22 09:53:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:11,584 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand 3 states. [2020-12-22 09:53:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:11,670 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2020-12-22 09:53:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:11,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:11,690 INFO L225 Difference]: With dead ends: 2853 [2020-12-22 09:53:11,691 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 09:53:11,695 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 09:53:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 09:53:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2020-12-22 09:53:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:53:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2020-12-22 09:53:11,792 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2020-12-22 09:53:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:11,793 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2020-12-22 09:53:11,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2020-12-22 09:53:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:11,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:11,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:11,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:53:11,797 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:53:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:11,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618277538] [2020-12-22 09:53:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:12,045 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 09:53:12,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618277538] [2020-12-22 09:53:12,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:12,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:12,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168174421] [2020-12-22 09:53:12,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:12,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:12,048 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand 7 states. [2020-12-22 09:53:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:12,315 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2020-12-22 09:53:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:12,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:53:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:12,331 INFO L225 Difference]: With dead ends: 3015 [2020-12-22 09:53:12,331 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 09:53:12,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:53:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 09:53:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2020-12-22 09:53:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:53:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2020-12-22 09:53:12,502 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2020-12-22 09:53:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:12,504 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2020-12-22 09:53:12,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2020-12-22 09:53:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:12,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:12,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:12,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:53:12,506 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:53:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:12,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743689854] [2020-12-22 09:53:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:12,603 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 09:53:12,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743689854] [2020-12-22 09:53:12,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:12,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:12,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287142122] [2020-12-22 09:53:12,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:12,608 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand 3 states. [2020-12-22 09:53:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:12,693 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2020-12-22 09:53:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:12,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:12,709 INFO L225 Difference]: With dead ends: 3325 [2020-12-22 09:53:12,709 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 09:53:12,712 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 09:53:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 09:53:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-12-22 09:53:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 09:53:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2020-12-22 09:53:12,822 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2020-12-22 09:53:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:12,822 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2020-12-22 09:53:12,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2020-12-22 09:53:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:12,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:12,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:12,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:53:12,824 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:53:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:12,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216698247] [2020-12-22 09:53:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:12,893 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 09:53:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216698247] [2020-12-22 09:53:12,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:12,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900892225] [2020-12-22 09:53:12,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:12,897 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand 3 states. [2020-12-22 09:53:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:13,028 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2020-12-22 09:53:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:13,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:13,046 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 09:53:13,046 INFO L226 Difference]: Without dead ends: 3537 [2020-12-22 09:53:13,049 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 09:53:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-12-22 09:53:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2020-12-22 09:53:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3535 states. [2020-12-22 09:53:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2020-12-22 09:53:13,201 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2020-12-22 09:53:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:13,201 INFO L481 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2020-12-22 09:53:13,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2020-12-22 09:53:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:53:13,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:13,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:13,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:53:13,205 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:53:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:13,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360506464] [2020-12-22 09:53:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:13,259 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 09:53:13,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360506464] [2020-12-22 09:53:13,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:13,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470381105] [2020-12-22 09:53:13,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:13,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:13,261 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand 3 states. [2020-12-22 09:53:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:13,493 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2020-12-22 09:53:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:13,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:53:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:13,520 INFO L225 Difference]: With dead ends: 5827 [2020-12-22 09:53:13,520 INFO L226 Difference]: Without dead ends: 4585 [2020-12-22 09:53:13,524 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 09:53:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2020-12-22 09:53:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2020-12-22 09:53:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-12-22 09:53:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2020-12-22 09:53:13,793 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2020-12-22 09:53:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:13,793 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2020-12-22 09:53:13,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2020-12-22 09:53:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:53:13,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:13,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:13,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:53:13,795 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:13,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:13,795 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:53:13,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:13,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854762738] [2020-12-22 09:53:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:13,911 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 09:53:13,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854762738] [2020-12-22 09:53:13,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:13,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506723619] [2020-12-22 09:53:13,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:53:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:13,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:53:13,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:53:13,916 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand 5 states. [2020-12-22 09:53:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:14,342 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2020-12-22 09:53:14,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:14,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:53:14,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:14,371 INFO L225 Difference]: With dead ends: 6309 [2020-12-22 09:53:14,371 INFO L226 Difference]: Without dead ends: 6307 [2020-12-22 09:53:14,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:53:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2020-12-22 09:53:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2020-12-22 09:53:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:53:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2020-12-22 09:53:14,671 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2020-12-22 09:53:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:14,671 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2020-12-22 09:53:14,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:53:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2020-12-22 09:53:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:53:14,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:14,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:14,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:53:14,673 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:53:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:14,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368289427] [2020-12-22 09:53:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:14,726 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 09:53:14,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368289427] [2020-12-22 09:53:14,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:14,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659408955] [2020-12-22 09:53:14,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:14,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:14,728 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand 3 states. [2020-12-22 09:53:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:15,157 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2020-12-22 09:53:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:15,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:53:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:15,174 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:53:15,175 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:53:15,179 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 09:53:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:53:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:53:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:53:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2020-12-22 09:53:15,618 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2020-12-22 09:53:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:15,618 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2020-12-22 09:53:15,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2020-12-22 09:53:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:15,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:15,624 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] [2020-12-22 09:53:15,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:53:15,625 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:53:15,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:15,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965731901] [2020-12-22 09:53:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:53:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965731901] [2020-12-22 09:53:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663101735] [2020-12-22 09:53:15,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:15,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:15,816 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand 7 states. [2020-12-22 09:53:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:17,573 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2020-12-22 09:53:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:17,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:17,627 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:53:17,627 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:53:17,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:53:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:53:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:53:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2020-12-22 09:53:18,597 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2020-12-22 09:53:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:18,597 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2020-12-22 09:53:18,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2020-12-22 09:53:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:18,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:18,602 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:53:18,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:53:18,602 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:53:18,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:18,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099866989] [2020-12-22 09:53:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:53:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099866989] [2020-12-22 09:53:18,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:18,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:18,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335730370] [2020-12-22 09:53:18,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:18,738 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand 7 states. [2020-12-22 09:53:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:20,459 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2020-12-22 09:53:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:20,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:20,521 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:53:20,521 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:53:20,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:53:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:53:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:53:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2020-12-22 09:53:21,777 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2020-12-22 09:53:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:21,777 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2020-12-22 09:53:21,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2020-12-22 09:53:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:21,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:21,782 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:53:21,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:53:21,783 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:53:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:21,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449199523] [2020-12-22 09:53:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:53:21,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449199523] [2020-12-22 09:53:21,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:21,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:21,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879581177] [2020-12-22 09:53:21,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:21,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:21,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:21,926 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand 7 states. [2020-12-22 09:53:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:23,409 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2020-12-22 09:53:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:23,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:23,480 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:53:23,481 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:53:23,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:53:24,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:53:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:53:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2020-12-22 09:53:25,007 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2020-12-22 09:53:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:25,007 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2020-12-22 09:53:25,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2020-12-22 09:53:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:53:25,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:25,014 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:53:25,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:53:25,014 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:53:25,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:25,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672142428] [2020-12-22 09:53:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:53:25,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672142428] [2020-12-22 09:53:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139595156] [2020-12-22 09:53:25,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:25,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:25,162 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand 7 states. [2020-12-22 09:53:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:27,432 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2020-12-22 09:53:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:27,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:53:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:27,492 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:53:27,492 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:53:27,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:53:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:53:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:53:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2020-12-22 09:53:28,909 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2020-12-22 09:53:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:28,909 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2020-12-22 09:53:28,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2020-12-22 09:53:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:28,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:28,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:28,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:53:28,917 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:53:28,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:28,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357986960] [2020-12-22 09:53:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357986960] [2020-12-22 09:53:28,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:28,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:28,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332312007] [2020-12-22 09:53:28,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:28,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:29,000 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand 3 states. [2020-12-22 09:53:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:30,241 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2020-12-22 09:53:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:30,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:53:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:30,268 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:53:30,269 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:53:30,290 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 09:53:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:53:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:53:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:53:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2020-12-22 09:53:31,150 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2020-12-22 09:53:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:31,151 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2020-12-22 09:53:31,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2020-12-22 09:53:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:53:31,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:31,156 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:53:31,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:53:31,156 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:31,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:53:31,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:31,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363896906] [2020-12-22 09:53:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:31,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363896906] [2020-12-22 09:53:31,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:31,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:53:31,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093106888] [2020-12-22 09:53:31,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:53:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:53:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:53:31,305 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand 7 states. [2020-12-22 09:53:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:32,974 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2020-12-22 09:53:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:53:32,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:53:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:33,016 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:53:33,016 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:53:33,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:53:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:53:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:53:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:53:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2020-12-22 09:53:34,362 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2020-12-22 09:53:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:34,362 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2020-12-22 09:53:34,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:53:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2020-12-22 09:53:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:34,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:34,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:34,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:53:34,369 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:34,369 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:53:34,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:34,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168750518] [2020-12-22 09:53:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:34,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168750518] [2020-12-22 09:53:34,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:34,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882903027] [2020-12-22 09:53:34,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:34,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:34,443 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand 3 states. [2020-12-22 09:53:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:34,982 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2020-12-22 09:53:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:34,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:34,996 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:53:34,996 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:53:35,014 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 09:53:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:53:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:53:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:53:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2020-12-22 09:53:35,587 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2020-12-22 09:53:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:35,587 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2020-12-22 09:53:35,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2020-12-22 09:53:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:35,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:35,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:35,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:53:35,591 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:53:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:35,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936114133] [2020-12-22 09:53:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:35,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936114133] [2020-12-22 09:53:35,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:35,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939085316] [2020-12-22 09:53:35,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:35,657 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand 3 states. [2020-12-22 09:53:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:36,105 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2020-12-22 09:53:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:36,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:36,116 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:53:36,117 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:53:36,132 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 09:53:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:53:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:53:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:53:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2020-12-22 09:53:36,596 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2020-12-22 09:53:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:36,597 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2020-12-22 09:53:36,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2020-12-22 09:53:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:36,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:36,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:36,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:53:36,600 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:53:36,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:36,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923805758] [2020-12-22 09:53:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923805758] [2020-12-22 09:53:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125972199] [2020-12-22 09:53:36,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:36,665 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand 3 states. [2020-12-22 09:53:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:36,940 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2020-12-22 09:53:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:36,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:53:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:36,949 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:53:36,949 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:53:36,955 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 09:53:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:53:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:53:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:53:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2020-12-22 09:53:37,248 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2020-12-22 09:53:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:37,249 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2020-12-22 09:53:37,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2020-12-22 09:53:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:37,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:37,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:37,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:53:37,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:53:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:37,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030024629] [2020-12-22 09:53:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030024629] [2020-12-22 09:53:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194971249] [2020-12-22 09:53:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:37,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:53:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:53:38,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:38,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:53:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519950915] [2020-12-22 09:53:38,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:53:38,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:53:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:53:38,239 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand 16 states. [2020-12-22 09:53:40,375 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:53:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:42,469 INFO L93 Difference]: Finished difference Result 15373 states and 21264 transitions. [2020-12-22 09:53:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:53:42,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:53:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:42,524 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:53:42,524 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:53:42,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:53:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:53:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:53:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:53:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13807 transitions. [2020-12-22 09:53:43,318 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13807 transitions. Word has length 97 [2020-12-22 09:53:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:43,318 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13807 transitions. [2020-12-22 09:53:43,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:53:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13807 transitions. [2020-12-22 09:53:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:43,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:43,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:43,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:53:43,536 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:53:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133972445] [2020-12-22 09:53:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:43,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133972445] [2020-12-22 09:53:43,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179266090] [2020-12-22 09:53:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:44,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:44,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:44,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:53:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930687729] [2020-12-22 09:53:44,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:53:44,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:53:44,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:53:44,652 INFO L87 Difference]: Start difference. First operand 10024 states and 13807 transitions. Second operand 22 states. [2020-12-22 09:53:46,988 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:53:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:49,814 INFO L93 Difference]: Finished difference Result 40825 states and 54873 transitions. [2020-12-22 09:53:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:53:49,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:53:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:49,866 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:53:49,866 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:53:49,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:53:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:53:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:53:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:53:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30346 transitions. [2020-12-22 09:53:52,401 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30346 transitions. Word has length 98 [2020-12-22 09:53:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:52,401 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30346 transitions. [2020-12-22 09:53:52,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:53:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30346 transitions. [2020-12-22 09:53:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:52,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:52,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:52,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:53:52,619 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:53:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:52,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674401755] [2020-12-22 09:53:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:52,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674401755] [2020-12-22 09:53:52,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203382386] [2020-12-22 09:53:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:53,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:53,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:53,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:53,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983010679] [2020-12-22 09:53:53,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:53,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:53,653 INFO L87 Difference]: Start difference. First operand 22527 states and 30346 transitions. Second operand 17 states. [2020-12-22 09:53:54,614 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:56,632 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:57,825 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:02,293 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:19,609 INFO L93 Difference]: Finished difference Result 194506 states and 257832 transitions. [2020-12-22 09:54:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:54:19,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:54:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:19,930 INFO L225 Difference]: With dead ends: 194506 [2020-12-22 09:54:19,931 INFO L226 Difference]: Without dead ends: 174949 [2020-12-22 09:54:19,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:54:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174949 states. [2020-12-22 09:54:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174949 to 112800. [2020-12-22 09:54:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:54:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147729 transitions. [2020-12-22 09:54:33,445 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147729 transitions. Word has length 98 [2020-12-22 09:54:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:33,445 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147729 transitions. [2020-12-22 09:54:33,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:54:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147729 transitions. [2020-12-22 09:54:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:33,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:33,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:33,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:54:33,650 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:33,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:54:33,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:33,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425954875] [2020-12-22 09:54:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:54:34,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425954875] [2020-12-22 09:54:34,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:34,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:34,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812615122] [2020-12-22 09:54:34,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:34,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:34,023 INFO L87 Difference]: Start difference. First operand 112800 states and 147729 transitions. Second operand 6 states. [2020-12-22 09:54:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:40,950 INFO L93 Difference]: Finished difference Result 169219 states and 222288 transitions. [2020-12-22 09:54:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:40,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:41,031 INFO L225 Difference]: With dead ends: 169219 [2020-12-22 09:54:41,032 INFO L226 Difference]: Without dead ends: 58915 [2020-12-22 09:54:41,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:54:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58915 states. [2020-12-22 09:54:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58915 to 58915. [2020-12-22 09:54:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58915 states. [2020-12-22 09:54:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58915 states to 58915 states and 77394 transitions. [2020-12-22 09:54:47,545 INFO L78 Accepts]: Start accepts. Automaton has 58915 states and 77394 transitions. Word has length 98 [2020-12-22 09:54:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:47,545 INFO L481 AbstractCegarLoop]: Abstraction has 58915 states and 77394 transitions. [2020-12-22 09:54:47,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 58915 states and 77394 transitions. [2020-12-22 09:54:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:47,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:47,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:47,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:54:47,549 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:54:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:47,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028087356] [2020-12-22 09:54:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:54:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028087356] [2020-12-22 09:54:47,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:47,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:47,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271829710] [2020-12-22 09:54:47,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:47,639 INFO L87 Difference]: Start difference. First operand 58915 states and 77394 transitions. Second operand 6 states. [2020-12-22 09:54:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:52,897 INFO L93 Difference]: Finished difference Result 100581 states and 131837 transitions. [2020-12-22 09:54:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:52,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:52,942 INFO L225 Difference]: With dead ends: 100581 [2020-12-22 09:54:52,942 INFO L226 Difference]: Without dead ends: 44246 [2020-12-22 09:54:52,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:54:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44246 states. [2020-12-22 09:54:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44246 to 44246. [2020-12-22 09:54:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44246 states. [2020-12-22 09:54:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44246 states to 44246 states and 57439 transitions. [2020-12-22 09:54:58,165 INFO L78 Accepts]: Start accepts. Automaton has 44246 states and 57439 transitions. Word has length 98 [2020-12-22 09:54:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:58,165 INFO L481 AbstractCegarLoop]: Abstraction has 44246 states and 57439 transitions. [2020-12-22 09:54:58,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44246 states and 57439 transitions. [2020-12-22 09:54:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:58,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:58,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:54:58,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:54:58,167 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:54:58,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:58,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517980322] [2020-12-22 09:54:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:54:58,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517980322] [2020-12-22 09:54:58,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:58,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:58,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732173565] [2020-12-22 09:54:58,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:58,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:58,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:58,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:58,251 INFO L87 Difference]: Start difference. First operand 44246 states and 57439 transitions. Second operand 6 states. [2020-12-22 09:55:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:06,644 INFO L93 Difference]: Finished difference Result 114022 states and 148138 transitions. [2020-12-22 09:55:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:06,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:55:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:06,720 INFO L225 Difference]: With dead ends: 114022 [2020-12-22 09:55:06,720 INFO L226 Difference]: Without dead ends: 72148 [2020-12-22 09:55:06,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:55:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72148 states. [2020-12-22 09:55:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72148 to 65074. [2020-12-22 09:55:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65074 states. [2020-12-22 09:55:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65074 states to 65074 states and 84260 transitions. [2020-12-22 09:55:14,495 INFO L78 Accepts]: Start accepts. Automaton has 65074 states and 84260 transitions. Word has length 98 [2020-12-22 09:55:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:14,495 INFO L481 AbstractCegarLoop]: Abstraction has 65074 states and 84260 transitions. [2020-12-22 09:55:14,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 65074 states and 84260 transitions. [2020-12-22 09:55:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:55:14,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:14,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:14,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:55:14,499 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:55:14,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:14,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721523676] [2020-12-22 09:55:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:55:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721523676] [2020-12-22 09:55:14,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:14,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:14,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618867918] [2020-12-22 09:55:14,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:55:14,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:55:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:55:14,581 INFO L87 Difference]: Start difference. First operand 65074 states and 84260 transitions. Second operand 6 states. [2020-12-22 09:55:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:21,015 INFO L93 Difference]: Finished difference Result 113520 states and 146729 transitions. [2020-12-22 09:55:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:55:21,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:55:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:21,084 INFO L225 Difference]: With dead ends: 113520 [2020-12-22 09:55:21,084 INFO L226 Difference]: Without dead ends: 50828 [2020-12-22 09:55:21,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:55:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50828 states. [2020-12-22 09:55:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50828 to 50828. [2020-12-22 09:55:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50828 states. [2020-12-22 09:55:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 65315 transitions. [2020-12-22 09:55:27,282 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 65315 transitions. Word has length 99 [2020-12-22 09:55:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:27,282 INFO L481 AbstractCegarLoop]: Abstraction has 50828 states and 65315 transitions. [2020-12-22 09:55:27,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:55:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 65315 transitions. [2020-12-22 09:55:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:55:27,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:27,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:27,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:55:27,285 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:55:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102522157] [2020-12-22 09:55:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:27,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102522157] [2020-12-22 09:55:27,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23492533] [2020-12-22 09:55:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:55:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:55:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:55:27,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:55:28,315 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:55:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:28,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:55:28,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:55:28,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634109720] [2020-12-22 09:55:28,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:55:28,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:55:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:55:28,931 INFO L87 Difference]: Start difference. First operand 50828 states and 65315 transitions. Second operand 20 states. [2020-12-22 09:55:29,948 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:55:30,412 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:55:31,055 WARN L197 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:55:31,777 WARN L197 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:55:32,545 WARN L197 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:33,170 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:33,965 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:34,472 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:55:35,156 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:35,743 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:55:36,467 WARN L197 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:37,140 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:38,054 WARN L197 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:55:38,801 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:55:39,558 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:55:40,591 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:55:44,526 WARN L197 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:55:45,515 WARN L197 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:55:46,369 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:46,862 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:55:47,904 WARN L197 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:55:48,380 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:48,804 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:49,298 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:49,899 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:55:50,284 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:51,388 WARN L197 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:55:52,208 WARN L197 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:52,794 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:55:53,241 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:54,603 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:55,091 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:56,017 WARN L197 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:56,495 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:56,882 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:56:00,581 WARN L197 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 09:56:02,477 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 09:56:03,507 WARN L197 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:56:04,026 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:56:04,543 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:56:05,480 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 09:56:06,003 WARN L197 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:56:06,687 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:56:07,027 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:56:07,827 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:56:08,135 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:56:21,453 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:21,743 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:56:22,061 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:56:22,942 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:56:23,249 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:56:25,765 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:56:26,375 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 71