/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:00:35,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:00:35,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:00:35,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:00:35,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:00:35,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:00:35,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:00:35,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:00:35,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:00:35,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:00:35,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:00:35,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:00:35,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:00:35,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:00:35,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:00:35,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:00:35,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:00:35,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:00:35,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:00:35,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:00:35,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:00:35,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:00:35,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:00:35,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:00:35,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:00:35,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:00:35,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:00:35,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:00:35,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:00:35,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:00:35,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:00:35,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:00:35,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:00:35,742 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:00:35,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:00:35,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:00:35,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:00:35,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:00:35,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:00:35,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:00:35,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:00:35,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:00:35,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:00:35,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:00:35,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:00:35,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:00:35,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:35,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:00:35,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:00:35,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:00:35,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:00:35,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:00:35,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:00:35,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:00:35,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:00:36,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:00:36,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:00:36,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:00:36,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:00:36,243 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:00:36,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2020-12-22 10:00:36,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfab4bae/460f4ab2e42e4a1ab0e9d0a8c9e72624/FLAGc1df28f61 [2020-12-22 10:00:37,357 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:00:37,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2020-12-22 10:00:37,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfab4bae/460f4ab2e42e4a1ab0e9d0a8c9e72624/FLAGc1df28f61 [2020-12-22 10:00:37,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdfab4bae/460f4ab2e42e4a1ab0e9d0a8c9e72624 [2020-12-22 10:00:37,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:00:37,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:00:37,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:37,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:00:37,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:00:37,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:37" (1/1) ... [2020-12-22 10:00:37,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49199913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:37, skipping insertion in model container [2020-12-22 10:00:37,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:37" (1/1) ... [2020-12-22 10:00:37,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:00:38,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:00:38,390 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2020-12-22 10:00:38,479 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2020-12-22 10:00:39,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:39,589 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:00:39,687 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2020-12-22 10:00:39,708 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2020-12-22 10:00:40,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:40,569 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:00:40,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40 WrapperNode [2020-12-22 10:00:40,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:40,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:40,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:00:40,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:00:40,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:40,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:41,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:00:41,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:00:41,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:00:41,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... [2020-12-22 10:00:41,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:00:41,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:00:41,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:00:41,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:00:41,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:00:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:00:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:00:41,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:00:47,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:00:47,617 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:00:47,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:47 BoogieIcfgContainer [2020-12-22 10:00:47,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:00:47,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:00:47,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:00:47,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:00:47,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:00:37" (1/3) ... [2020-12-22 10:00:47,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bed485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:47, skipping insertion in model container [2020-12-22 10:00:47,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:40" (2/3) ... [2020-12-22 10:00:47,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bed485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:47, skipping insertion in model container [2020-12-22 10:00:47,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:47" (3/3) ... [2020-12-22 10:00:47,636 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2020-12-22 10:00:47,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:00:47,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:00:47,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:00:47,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:00:47,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:00:47,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:00:47,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:00:47,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:00:47,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:00:47,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:00:47,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:00:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:00:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:47,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:47,763 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:00:47,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:47,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541610625] [2020-12-22 10:00:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:48,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541610625] [2020-12-22 10:00:48,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:48,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985589289] [2020-12-22 10:00:48,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:00:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:00:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:48,058 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:00:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:48,149 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:00:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:00:48,151 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:00:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:48,193 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:00:48,194 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:48,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:00:48,360 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:00:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:48,361 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:00:48,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:00:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:00:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:00:48,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:48,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:48,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:00:48,371 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:00:48,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:48,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842783580] [2020-12-22 10:00:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:48,603 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 10:00:48,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842783580] [2020-12-22 10:00:48,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:48,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782137515] [2020-12-22 10:00:48,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:48,607 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:00:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:48,846 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:00:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:00:48,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:00:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:48,857 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:00:48,857 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:00:48,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:00:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:00:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:00:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:00:48,884 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:00:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:48,885 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:00:48,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:00:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:00:48,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:48,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:48,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:00:48,893 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 642093148, now seen corresponding path program 1 times [2020-12-22 10:00:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:48,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016184471] [2020-12-22 10:00:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016184471] [2020-12-22 10:00:49,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:49,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902031128] [2020-12-22 10:00:49,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:49,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:49,069 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 3 states. [2020-12-22 10:00:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,578 INFO L93 Difference]: Finished difference Result 2364 states and 4453 transitions. [2020-12-22 10:00:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:54,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 10:00:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:54,598 INFO L225 Difference]: With dead ends: 2364 [2020-12-22 10:00:54,598 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:00:54,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:00:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:00:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:00:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2559 transitions. [2020-12-22 10:00:54,645 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2559 transitions. Word has length 61 [2020-12-22 10:00:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,646 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2559 transitions. [2020-12-22 10:00:54,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2559 transitions. [2020-12-22 10:00:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:54,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:00:54,649 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:00:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99299301] [2020-12-22 10:00:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:54,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99299301] [2020-12-22 10:00:54,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:54,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431113876] [2020-12-22 10:00:54,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:54,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:54,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,766 INFO L87 Difference]: Start difference. First operand 1611 states and 2559 transitions. Second operand 3 states. [2020-12-22 10:00:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,821 INFO L93 Difference]: Finished difference Result 1725 states and 2739 transitions. [2020-12-22 10:00:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:54,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:54,834 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:00:54,834 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:00:54,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:00:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:00:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:00:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2642 transitions. [2020-12-22 10:00:54,888 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2642 transitions. Word has length 77 [2020-12-22 10:00:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:54,888 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2642 transitions. [2020-12-22 10:00:54,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2642 transitions. [2020-12-22 10:00:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:54,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:54,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:54,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:00:54,892 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:00:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:54,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140822427] [2020-12-22 10:00:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:55,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140822427] [2020-12-22 10:00:55,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:55,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:55,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237348972] [2020-12-22 10:00:55,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:55,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:55,021 INFO L87 Difference]: Start difference. First operand 1663 states and 2642 transitions. Second operand 3 states. [2020-12-22 10:00:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:55,073 INFO L93 Difference]: Finished difference Result 1875 states and 2978 transitions. [2020-12-22 10:00:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:55,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:00:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,085 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:00:55,085 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:00:55,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:00:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:00:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:00:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2797 transitions. [2020-12-22 10:00:55,146 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2797 transitions. Word has length 77 [2020-12-22 10:00:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:55,149 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2797 transitions. [2020-12-22 10:00:55,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2797 transitions. [2020-12-22 10:00:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:00:55,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:55,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:55,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:00:55,151 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:00:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:55,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215968528] [2020-12-22 10:00:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:55,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215968528] [2020-12-22 10:00:55,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:55,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121438329] [2020-12-22 10:00:55,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:55,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:55,312 INFO L87 Difference]: Start difference. First operand 1761 states and 2797 transitions. Second operand 8 states. [2020-12-22 10:00:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:55,756 INFO L93 Difference]: Finished difference Result 4281 states and 6793 transitions. [2020-12-22 10:00:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:00:55,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:00:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,781 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:00:55,782 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:00:55,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:00:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:00:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:00:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:00:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3121 transitions. [2020-12-22 10:00:55,888 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3121 transitions. Word has length 77 [2020-12-22 10:00:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:55,888 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3121 transitions. [2020-12-22 10:00:55,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3121 transitions. [2020-12-22 10:00:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:55,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:55,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:55,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:00:55,891 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:00:55,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:55,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250282234] [2020-12-22 10:00:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:56,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250282234] [2020-12-22 10:00:56,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:56,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:56,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89588889] [2020-12-22 10:00:56,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:56,010 INFO L87 Difference]: Start difference. First operand 1969 states and 3121 transitions. Second operand 3 states. [2020-12-22 10:00:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:56,094 INFO L93 Difference]: Finished difference Result 2589 states and 4093 transitions. [2020-12-22 10:00:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:56,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:56,107 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:00:56,108 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:00:56,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:00:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:00:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:00:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3429 transitions. [2020-12-22 10:00:56,213 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3429 transitions. Word has length 79 [2020-12-22 10:00:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:56,214 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3429 transitions. [2020-12-22 10:00:56,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3429 transitions. [2020-12-22 10:00:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:56,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:56,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:56,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:00:56,223 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:00:56,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:56,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021823094] [2020-12-22 10:00:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:56,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021823094] [2020-12-22 10:00:56,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:56,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:00:56,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427257973] [2020-12-22 10:00:56,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:00:56,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:00:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:56,571 INFO L87 Difference]: Start difference. First operand 2169 states and 3429 transitions. Second operand 8 states. [2020-12-22 10:00:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:56,936 INFO L93 Difference]: Finished difference Result 2787 states and 4393 transitions. [2020-12-22 10:00:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:00:56,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:00:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:56,950 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:00:56,950 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:00:56,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:00:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:00:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:00:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:00:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3423 transitions. [2020-12-22 10:00:57,042 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3423 transitions. Word has length 79 [2020-12-22 10:00:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:57,042 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3423 transitions. [2020-12-22 10:00:57,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:00:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3423 transitions. [2020-12-22 10:00:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:57,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:57,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:57,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:00:57,045 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:00:57,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:57,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872995634] [2020-12-22 10:00:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:57,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872995634] [2020-12-22 10:00:57,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:57,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:57,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696704968] [2020-12-22 10:00:57,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,143 INFO L87 Difference]: Start difference. First operand 2169 states and 3423 transitions. Second operand 3 states. [2020-12-22 10:00:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:57,251 INFO L93 Difference]: Finished difference Result 3329 states and 5217 transitions. [2020-12-22 10:00:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:57,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:57,268 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:00:57,268 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:00:57,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:00:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:00:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:00:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4247 transitions. [2020-12-22 10:00:57,443 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4247 transitions. Word has length 79 [2020-12-22 10:00:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:57,444 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4247 transitions. [2020-12-22 10:00:57,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4247 transitions. [2020-12-22 10:00:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:57,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:57,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:57,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:00:57,447 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:00:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:57,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129114843] [2020-12-22 10:00:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:57,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129114843] [2020-12-22 10:00:57,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:57,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591356228] [2020-12-22 10:00:57,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:57,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,545 INFO L87 Difference]: Start difference. First operand 2711 states and 4247 transitions. Second operand 3 states. [2020-12-22 10:00:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:57,709 INFO L93 Difference]: Finished difference Result 4883 states and 7569 transitions. [2020-12-22 10:00:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:57,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:57,737 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:00:57,737 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:00:57,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:00:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:00:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:00:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5763 transitions. [2020-12-22 10:00:57,953 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5763 transitions. Word has length 79 [2020-12-22 10:00:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:57,953 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 5763 transitions. [2020-12-22 10:00:57,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5763 transitions. [2020-12-22 10:00:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:57,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:57,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:57,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:00:57,955 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:57,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:00:57,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:57,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217731946] [2020-12-22 10:00:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:58,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217731946] [2020-12-22 10:00:58,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:58,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455338959] [2020-12-22 10:00:58,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,048 INFO L87 Difference]: Start difference. First operand 3723 states and 5763 transitions. Second operand 3 states. [2020-12-22 10:00:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:58,347 INFO L93 Difference]: Finished difference Result 7775 states and 11877 transitions. [2020-12-22 10:00:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:58,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:58,399 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:00:58,399 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:00:58,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:00:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:00:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:00:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8531 transitions. [2020-12-22 10:00:58,752 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8531 transitions. Word has length 79 [2020-12-22 10:00:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:58,752 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8531 transitions. [2020-12-22 10:00:58,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8531 transitions. [2020-12-22 10:00:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:00:58,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:58,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:58,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:00:58,754 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:00:58,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:58,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005714577] [2020-12-22 10:00:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005714577] [2020-12-22 10:00:58,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:58,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:58,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132820677] [2020-12-22 10:00:58,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:58,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:58,824 INFO L87 Difference]: Start difference. First operand 5603 states and 8531 transitions. Second operand 3 states. [2020-12-22 10:00:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:59,430 INFO L93 Difference]: Finished difference Result 13127 states and 19701 transitions. [2020-12-22 10:00:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:59,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:00:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:59,455 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:00:59,455 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:00:59,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:01:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:01:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:01:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13539 transitions. [2020-12-22 10:01:00,083 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13539 transitions. Word has length 79 [2020-12-22 10:01:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:00,084 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13539 transitions. [2020-12-22 10:01:00,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13539 transitions. [2020-12-22 10:01:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:01:00,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:00,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:00,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:01:00,086 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:01:00,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:00,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753510707] [2020-12-22 10:01:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:00,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753510707] [2020-12-22 10:01:00,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:00,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153254932] [2020-12-22 10:01:00,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:00,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:00,255 INFO L87 Difference]: Start difference. First operand 9075 states and 13539 transitions. Second operand 8 states. [2020-12-22 10:01:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:01,551 INFO L93 Difference]: Finished difference Result 15538 states and 22810 transitions. [2020-12-22 10:01:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:01:01,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:01:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:01,591 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:01:01,591 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:01:01,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:01:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:01:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:01:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:01:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13891 transitions. [2020-12-22 10:01:02,484 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13891 transitions. Word has length 80 [2020-12-22 10:01:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:02,484 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13891 transitions. [2020-12-22 10:01:02,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13891 transitions. [2020-12-22 10:01:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:02,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:02,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:02,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:01:02,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:01:02,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:02,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657703175] [2020-12-22 10:01:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:01:02,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657703175] [2020-12-22 10:01:02,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:02,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:02,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838003939] [2020-12-22 10:01:02,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:02,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:02,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:02,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:02,659 INFO L87 Difference]: Start difference. First operand 9459 states and 13891 transitions. Second operand 8 states. [2020-12-22 10:01:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:06,152 INFO L93 Difference]: Finished difference Result 58465 states and 84602 transitions. [2020-12-22 10:01:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:06,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:06,283 INFO L225 Difference]: With dead ends: 58465 [2020-12-22 10:01:06,284 INFO L226 Difference]: Without dead ends: 50559 [2020-12-22 10:01:06,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2020-12-22 10:01:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 17363. [2020-12-22 10:01:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17363 states. [2020-12-22 10:01:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17363 states to 17363 states and 25219 transitions. [2020-12-22 10:01:08,231 INFO L78 Accepts]: Start accepts. Automaton has 17363 states and 25219 transitions. Word has length 112 [2020-12-22 10:01:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:08,232 INFO L481 AbstractCegarLoop]: Abstraction has 17363 states and 25219 transitions. [2020-12-22 10:01:08,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 17363 states and 25219 transitions. [2020-12-22 10:01:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:08,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:08,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:08,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:01:08,241 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:01:08,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:08,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549873912] [2020-12-22 10:01:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:01:08,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549873912] [2020-12-22 10:01:08,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:08,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:08,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046967486] [2020-12-22 10:01:08,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:08,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:08,408 INFO L87 Difference]: Start difference. First operand 17363 states and 25219 transitions. Second operand 8 states. [2020-12-22 10:01:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:11,963 INFO L93 Difference]: Finished difference Result 66369 states and 95930 transitions. [2020-12-22 10:01:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:11,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:12,115 INFO L225 Difference]: With dead ends: 66369 [2020-12-22 10:01:12,115 INFO L226 Difference]: Without dead ends: 58463 [2020-12-22 10:01:12,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58463 states. [2020-12-22 10:01:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58463 to 29235. [2020-12-22 10:01:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29235 states. [2020-12-22 10:01:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29235 states to 29235 states and 42131 transitions. [2020-12-22 10:01:14,368 INFO L78 Accepts]: Start accepts. Automaton has 29235 states and 42131 transitions. Word has length 112 [2020-12-22 10:01:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:14,368 INFO L481 AbstractCegarLoop]: Abstraction has 29235 states and 42131 transitions. [2020-12-22 10:01:14,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 29235 states and 42131 transitions. [2020-12-22 10:01:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:14,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:14,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:14,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:01:14,391 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:01:14,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:14,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655826160] [2020-12-22 10:01:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:01:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655826160] [2020-12-22 10:01:14,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:14,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98695788] [2020-12-22 10:01:14,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:14,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:14,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:14,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:14,553 INFO L87 Difference]: Start difference. First operand 29235 states and 42131 transitions. Second operand 8 states. [2020-12-22 10:01:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:18,481 INFO L93 Difference]: Finished difference Result 74273 states and 107258 transitions. [2020-12-22 10:01:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:18,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:18,628 INFO L225 Difference]: With dead ends: 74273 [2020-12-22 10:01:18,628 INFO L226 Difference]: Without dead ends: 66367 [2020-12-22 10:01:18,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66367 states. [2020-12-22 10:01:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66367 to 37139. [2020-12-22 10:01:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37139 states. [2020-12-22 10:01:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37139 states to 37139 states and 53459 transitions. [2020-12-22 10:01:21,583 INFO L78 Accepts]: Start accepts. Automaton has 37139 states and 53459 transitions. Word has length 112 [2020-12-22 10:01:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:21,583 INFO L481 AbstractCegarLoop]: Abstraction has 37139 states and 53459 transitions. [2020-12-22 10:01:21,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37139 states and 53459 transitions. [2020-12-22 10:01:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:21,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:21,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:21,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:01:21,597 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:01:21,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:21,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697646974] [2020-12-22 10:01:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:01:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697646974] [2020-12-22 10:01:21,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:21,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:21,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372450742] [2020-12-22 10:01:21,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:21,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:21,762 INFO L87 Difference]: Start difference. First operand 37139 states and 53459 transitions. Second operand 8 states. [2020-12-22 10:01:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:26,357 INFO L93 Difference]: Finished difference Result 82177 states and 118586 transitions. [2020-12-22 10:01:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:26,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:26,489 INFO L225 Difference]: With dead ends: 82177 [2020-12-22 10:01:26,489 INFO L226 Difference]: Without dead ends: 74271 [2020-12-22 10:01:26,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74271 states. [2020-12-22 10:01:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74271 to 45043. [2020-12-22 10:01:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45043 states. [2020-12-22 10:01:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45043 states to 45043 states and 64787 transitions. [2020-12-22 10:01:29,986 INFO L78 Accepts]: Start accepts. Automaton has 45043 states and 64787 transitions. Word has length 112 [2020-12-22 10:01:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:29,986 INFO L481 AbstractCegarLoop]: Abstraction has 45043 states and 64787 transitions. [2020-12-22 10:01:29,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 45043 states and 64787 transitions. [2020-12-22 10:01:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:30,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:30,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:30,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:01:30,001 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:01:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:30,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460147977] [2020-12-22 10:01:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:01:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460147977] [2020-12-22 10:01:30,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:30,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:30,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298925153] [2020-12-22 10:01:30,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:30,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:30,138 INFO L87 Difference]: Start difference. First operand 45043 states and 64787 transitions. Second operand 8 states. [2020-12-22 10:01:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:35,632 INFO L93 Difference]: Finished difference Result 90081 states and 129914 transitions. [2020-12-22 10:01:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:35,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:35,759 INFO L225 Difference]: With dead ends: 90081 [2020-12-22 10:01:35,759 INFO L226 Difference]: Without dead ends: 82175 [2020-12-22 10:01:35,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82175 states. [2020-12-22 10:01:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82175 to 52947. [2020-12-22 10:01:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52947 states. [2020-12-22 10:01:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52947 states to 52947 states and 76115 transitions. [2020-12-22 10:01:40,067 INFO L78 Accepts]: Start accepts. Automaton has 52947 states and 76115 transitions. Word has length 112 [2020-12-22 10:01:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:40,067 INFO L481 AbstractCegarLoop]: Abstraction has 52947 states and 76115 transitions. [2020-12-22 10:01:40,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 52947 states and 76115 transitions. [2020-12-22 10:01:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:40,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:40,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:40,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:01:40,080 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:01:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:40,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980935183] [2020-12-22 10:01:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:01:40,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980935183] [2020-12-22 10:01:40,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:40,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:40,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220994109] [2020-12-22 10:01:40,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:40,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:40,354 INFO L87 Difference]: Start difference. First operand 52947 states and 76115 transitions. Second operand 8 states. [2020-12-22 10:01:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:46,619 INFO L93 Difference]: Finished difference Result 93185 states and 134394 transitions. [2020-12-22 10:01:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:46,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:46,723 INFO L225 Difference]: With dead ends: 93185 [2020-12-22 10:01:46,723 INFO L226 Difference]: Without dead ends: 87679 [2020-12-22 10:01:46,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87679 states. [2020-12-22 10:01:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87679 to 58451. [2020-12-22 10:01:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:01:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 84051 transitions. [2020-12-22 10:01:51,675 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 84051 transitions. Word has length 112 [2020-12-22 10:01:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:51,675 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 84051 transitions. [2020-12-22 10:01:51,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 84051 transitions. [2020-12-22 10:01:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:01:51,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:51,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:51,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:01:51,690 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:51,691 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:01:51,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:51,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960151957] [2020-12-22 10:01:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960151957] [2020-12-22 10:01:51,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835106023] [2020-12-22 10:01:51,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:51,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:51,781 INFO L87 Difference]: Start difference. First operand 58451 states and 84051 transitions. Second operand 3 states. [2020-12-22 10:01:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:56,653 INFO L93 Difference]: Finished difference Result 115351 states and 165637 transitions. [2020-12-22 10:01:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:56,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:01:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:56,723 INFO L225 Difference]: With dead ends: 115351 [2020-12-22 10:01:56,728 INFO L226 Difference]: Without dead ends: 58453 [2020-12-22 10:01:56,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58453 states. [2020-12-22 10:02:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58453 to 58451. [2020-12-22 10:02:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:02:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 83363 transitions. [2020-12-22 10:02:01,329 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 83363 transitions. Word has length 113 [2020-12-22 10:02:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:01,330 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 83363 transitions. [2020-12-22 10:02:01,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 83363 transitions. [2020-12-22 10:02:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:01,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:01,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:02:01,339 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:01,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:02:01,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:01,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70397510] [2020-12-22 10:02:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:01,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70397510] [2020-12-22 10:02:01,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:01,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:01,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049923808] [2020-12-22 10:02:01,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:01,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:01,412 INFO L87 Difference]: Start difference. First operand 58451 states and 83363 transitions. Second operand 3 states. [2020-12-22 10:02:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:03,951 INFO L93 Difference]: Finished difference Result 86903 states and 123813 transitions. [2020-12-22 10:02:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:03,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:03,984 INFO L225 Difference]: With dead ends: 86903 [2020-12-22 10:02:03,984 INFO L226 Difference]: Without dead ends: 30005 [2020-12-22 10:02:04,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30005 states. [2020-12-22 10:02:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30005 to 30003. [2020-12-22 10:02:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30003 states. [2020-12-22 10:02:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30003 states to 30003 states and 42571 transitions. [2020-12-22 10:02:06,413 INFO L78 Accepts]: Start accepts. Automaton has 30003 states and 42571 transitions. Word has length 113 [2020-12-22 10:02:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:06,413 INFO L481 AbstractCegarLoop]: Abstraction has 30003 states and 42571 transitions. [2020-12-22 10:02:06,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30003 states and 42571 transitions. [2020-12-22 10:02:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:06,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:06,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:06,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:02:06,418 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:06,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:02:06,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:06,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896768643] [2020-12-22 10:02:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:06,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896768643] [2020-12-22 10:02:06,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:06,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:06,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139559704] [2020-12-22 10:02:06,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:06,488 INFO L87 Difference]: Start difference. First operand 30003 states and 42571 transitions. Second operand 3 states. [2020-12-22 10:02:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:07,920 INFO L93 Difference]: Finished difference Result 44231 states and 62625 transitions. [2020-12-22 10:02:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:07,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:07,942 INFO L225 Difference]: With dead ends: 44231 [2020-12-22 10:02:07,942 INFO L226 Difference]: Without dead ends: 15781 [2020-12-22 10:02:07,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2020-12-22 10:02:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 15779. [2020-12-22 10:02:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15779 states. [2020-12-22 10:02:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 22347 transitions. [2020-12-22 10:02:09,275 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 22347 transitions. Word has length 113 [2020-12-22 10:02:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:09,275 INFO L481 AbstractCegarLoop]: Abstraction has 15779 states and 22347 transitions. [2020-12-22 10:02:09,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 22347 transitions. [2020-12-22 10:02:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:09,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:09,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:02:09,279 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:02:09,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:09,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105998996] [2020-12-22 10:02:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:09,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105998996] [2020-12-22 10:02:09,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:09,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:09,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648013985] [2020-12-22 10:02:09,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:09,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:09,350 INFO L87 Difference]: Start difference. First operand 15779 states and 22347 transitions. Second operand 3 states. [2020-12-22 10:02:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:10,057 INFO L93 Difference]: Finished difference Result 22895 states and 32289 transitions. [2020-12-22 10:02:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:10,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:10,067 INFO L225 Difference]: With dead ends: 22895 [2020-12-22 10:02:10,067 INFO L226 Difference]: Without dead ends: 8669 [2020-12-22 10:02:10,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2020-12-22 10:02:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 8667. [2020-12-22 10:02:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8667 states. [2020-12-22 10:02:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 12321 transitions. [2020-12-22 10:02:10,607 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 12321 transitions. Word has length 113 [2020-12-22 10:02:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:10,608 INFO L481 AbstractCegarLoop]: Abstraction has 8667 states and 12321 transitions. [2020-12-22 10:02:10,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 12321 transitions. [2020-12-22 10:02:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:10,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:10,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:10,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:02:10,610 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:02:10,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:10,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241404387] [2020-12-22 10:02:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241404387] [2020-12-22 10:02:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347851137] [2020-12-22 10:02:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:02:11,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:02:11,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:11,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:02:11,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706533152] [2020-12-22 10:02:11,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:02:11,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:02:11,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:02:11,507 INFO L87 Difference]: Start difference. First operand 8667 states and 12321 transitions. Second operand 21 states. [2020-12-22 10:02:15,870 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:02:19,552 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-22 10:02:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:21,822 INFO L93 Difference]: Finished difference Result 56546 states and 77626 transitions. [2020-12-22 10:02:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:02:21,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:02:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:21,914 INFO L225 Difference]: With dead ends: 56546 [2020-12-22 10:02:21,914 INFO L226 Difference]: Without dead ends: 49432 [2020-12-22 10:02:21,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:02:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49432 states. [2020-12-22 10:02:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49432 to 31687. [2020-12-22 10:02:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31687 states. [2020-12-22 10:02:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31687 states to 31687 states and 43489 transitions. [2020-12-22 10:02:25,262 INFO L78 Accepts]: Start accepts. Automaton has 31687 states and 43489 transitions. Word has length 113 [2020-12-22 10:02:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:25,262 INFO L481 AbstractCegarLoop]: Abstraction has 31687 states and 43489 transitions. [2020-12-22 10:02:25,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:02:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 31687 states and 43489 transitions. [2020-12-22 10:02:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:02:25,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:25,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:02:25,469 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:02:25,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:25,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110324641] [2020-12-22 10:02:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110324641] [2020-12-22 10:02:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695355008] [2020-12-22 10:02:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:02:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:26,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:02:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:26,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:26,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:02:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483295594] [2020-12-22 10:02:26,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:02:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:02:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:02:26,317 INFO L87 Difference]: Start difference. First operand 31687 states and 43489 transitions. Second operand 18 states. [2020-12-22 10:02:28,940 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 10:02:32,948 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:02:35,052 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:02:36,599 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:03:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:09,718 INFO L93 Difference]: Finished difference Result 351947 states and 476138 transitions. [2020-12-22 10:03:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:03:09,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:03:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:10,487 INFO L225 Difference]: With dead ends: 351947 [2020-12-22 10:03:10,488 INFO L226 Difference]: Without dead ends: 321813 [2020-12-22 10:03:10,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:03:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321813 states. [2020-12-22 10:03:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321813 to 137964. [2020-12-22 10:03:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137964 states. [2020-12-22 10:03:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137964 states to 137964 states and 185015 transitions. [2020-12-22 10:03:27,073 INFO L78 Accepts]: Start accepts. Automaton has 137964 states and 185015 transitions. Word has length 114 [2020-12-22 10:03:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:27,074 INFO L481 AbstractCegarLoop]: Abstraction has 137964 states and 185015 transitions. [2020-12-22 10:03:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:03:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 137964 states and 185015 transitions. [2020-12-22 10:03:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:27,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:27,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:27,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:03:27,279 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:03:27,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:27,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337264882] [2020-12-22 10:03:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:27,370 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 10:03:27,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337264882] [2020-12-22 10:03:27,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:27,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600158496] [2020-12-22 10:03:27,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:27,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:27,373 INFO L87 Difference]: Start difference. First operand 137964 states and 185015 transitions. Second operand 3 states. [2020-12-22 10:03:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:33,527 INFO L93 Difference]: Finished difference Result 190056 states and 254150 transitions. [2020-12-22 10:03:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:33,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:03:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:33,602 INFO L225 Difference]: With dead ends: 190056 [2020-12-22 10:03:33,602 INFO L226 Difference]: Without dead ends: 53645 [2020-12-22 10:03:33,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53645 states. [2020-12-22 10:03:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53645 to 50169. [2020-12-22 10:03:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50169 states. [2020-12-22 10:03:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50169 states to 50169 states and 66597 transitions. [2020-12-22 10:03:39,332 INFO L78 Accepts]: Start accepts. Automaton has 50169 states and 66597 transitions. Word has length 114 [2020-12-22 10:03:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:39,332 INFO L481 AbstractCegarLoop]: Abstraction has 50169 states and 66597 transitions. [2020-12-22 10:03:39,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 50169 states and 66597 transitions. [2020-12-22 10:03:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:39,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:39,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:39,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:03:39,337 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:03:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081839152] [2020-12-22 10:03:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:03:39,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081839152] [2020-12-22 10:03:39,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:39,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:39,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439319035] [2020-12-22 10:03:39,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:39,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:39,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:39,436 INFO L87 Difference]: Start difference. First operand 50169 states and 66597 transitions. Second operand 6 states. [2020-12-22 10:03:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:42,586 INFO L93 Difference]: Finished difference Result 74769 states and 99459 transitions. [2020-12-22 10:03:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:42,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:42,619 INFO L225 Difference]: With dead ends: 74769 [2020-12-22 10:03:42,620 INFO L226 Difference]: Without dead ends: 26270 [2020-12-22 10:03:42,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26270 states. [2020-12-22 10:03:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26270 to 26270. [2020-12-22 10:03:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26270 states. [2020-12-22 10:03:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26270 states to 26270 states and 35113 transitions. [2020-12-22 10:03:45,621 INFO L78 Accepts]: Start accepts. Automaton has 26270 states and 35113 transitions. Word has length 114 [2020-12-22 10:03:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:45,621 INFO L481 AbstractCegarLoop]: Abstraction has 26270 states and 35113 transitions. [2020-12-22 10:03:45,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26270 states and 35113 transitions. [2020-12-22 10:03:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:45,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:45,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:45,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:03:45,624 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:03:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:45,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761217562] [2020-12-22 10:03:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:03:45,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761217562] [2020-12-22 10:03:45,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:45,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:45,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371949794] [2020-12-22 10:03:45,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:45,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:45,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:45,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:45,745 INFO L87 Difference]: Start difference. First operand 26270 states and 35113 transitions. Second operand 6 states. [2020-12-22 10:03:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:48,135 INFO L93 Difference]: Finished difference Result 45263 states and 60210 transitions. [2020-12-22 10:03:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:48,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:48,158 INFO L225 Difference]: With dead ends: 45263 [2020-12-22 10:03:48,159 INFO L226 Difference]: Without dead ends: 20701 [2020-12-22 10:03:48,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20701 states. [2020-12-22 10:03:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20701 to 20701. [2020-12-22 10:03:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20701 states. [2020-12-22 10:03:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20701 states to 20701 states and 27451 transitions. [2020-12-22 10:03:50,552 INFO L78 Accepts]: Start accepts. Automaton has 20701 states and 27451 transitions. Word has length 114 [2020-12-22 10:03:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:50,552 INFO L481 AbstractCegarLoop]: Abstraction has 20701 states and 27451 transitions. [2020-12-22 10:03:50,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 20701 states and 27451 transitions. [2020-12-22 10:03:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:50,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:50,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:50,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:03:50,554 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:03:50,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:50,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570089857] [2020-12-22 10:03:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:03:50,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570089857] [2020-12-22 10:03:50,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:50,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665259800] [2020-12-22 10:03:50,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:50,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:50,646 INFO L87 Difference]: Start difference. First operand 20701 states and 27451 transitions. Second operand 6 states. [2020-12-22 10:03:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:54,670 INFO L93 Difference]: Finished difference Result 54989 states and 72811 transitions. [2020-12-22 10:03:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:54,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:54,710 INFO L225 Difference]: With dead ends: 54989 [2020-12-22 10:03:54,710 INFO L226 Difference]: Without dead ends: 35885 [2020-12-22 10:03:54,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:03:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35885 states. [2020-12-22 10:03:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35885 to 31923. [2020-12-22 10:03:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31923 states. [2020-12-22 10:03:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31923 states to 31923 states and 42054 transitions. [2020-12-22 10:03:58,489 INFO L78 Accepts]: Start accepts. Automaton has 31923 states and 42054 transitions. Word has length 114 [2020-12-22 10:03:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:58,489 INFO L481 AbstractCegarLoop]: Abstraction has 31923 states and 42054 transitions. [2020-12-22 10:03:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:03:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31923 states and 42054 transitions. [2020-12-22 10:03:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:03:58,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:58,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:58,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 10:03:58,492 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash 278857549, now seen corresponding path program 1 times [2020-12-22 10:03:58,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:58,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75420442] [2020-12-22 10:03:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:58,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75420442] [2020-12-22 10:03:58,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467315138] [2020-12-22 10:03:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:03:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:03:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:03:59,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:03:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:59,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:03:59,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:03:59,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976605006] [2020-12-22 10:03:59,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:03:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:03:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:03:59,214 INFO L87 Difference]: Start difference. First operand 31923 states and 42054 transitions. Second operand 17 states. [2020-12-22 10:03:59,904 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 20