/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:34:21,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:34:21,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:34:21,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:34:21,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:34:21,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:34:21,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:34:21,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:34:21,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:34:21,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:34:21,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:34:21,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:34:21,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:34:21,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:34:21,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:34:21,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:34:21,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:34:21,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:34:21,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:34:21,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:34:21,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-23 13:34:21,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:34:21,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:34:21,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:34:21,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:34:21,769 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:34:21,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:34:21,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:34:21,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:34:21,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:34:21,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:34:21,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:34:21,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:34:21,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:34:21,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:34:21,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:34:21,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:34:21,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:34:21,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:34:21,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:34:21,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:34:21,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:21,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:34:21,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:34:21,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:34:21,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:34:21,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:34:21,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:34:21,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:34:21,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:34:22,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:34:22,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:34:22,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:34:22,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:34:22,306 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:34:22,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2021-02-23 13:34:22,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890e7d1ac/6c7382e8c5b34e238ff9004115feb9a0/FLAG276be46fd [2021-02-23 13:34:23,585 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:34:23,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2021-02-23 13:34:23,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890e7d1ac/6c7382e8c5b34e238ff9004115feb9a0/FLAG276be46fd [2021-02-23 13:34:23,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/890e7d1ac/6c7382e8c5b34e238ff9004115feb9a0 [2021-02-23 13:34:23,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:34:23,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:34:23,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:23,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:34:23,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:34:23,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:23" (1/1) ... [2021-02-23 13:34:23,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1a60a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:23, skipping insertion in model container [2021-02-23 13:34:23,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:23" (1/1) ... [2021-02-23 13:34:23,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:34:23,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:34:23,922 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c[3218,3231] [2021-02-23 13:34:23,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:23,947 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:34:23,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c[3218,3231] [2021-02-23 13:34:23,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:24,012 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:34:24,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24 WrapperNode [2021-02-23 13:34:24,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:24,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:34:24,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:34:24,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:34:24,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (1/1) ... [2021-02-23 13:34:24,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:34:24,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:34:24,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:34:24,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:34:24,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (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 [2021-02-23 13:34:24,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:34:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:34:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:34:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:34:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:34:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:34:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:34:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:34:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:34:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:34:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:34:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:34:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:34:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:34:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:34:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:34:25,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:34:25,128 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:34:25,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:25 BoogieIcfgContainer [2021-02-23 13:34:25,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:34:25,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:34:25,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:34:25,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:34:25,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:34:23" (1/3) ... [2021-02-23 13:34:25,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc0f937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:25, skipping insertion in model container [2021-02-23 13:34:25,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:24" (2/3) ... [2021-02-23 13:34:25,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc0f937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:25, skipping insertion in model container [2021-02-23 13:34:25,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:25" (3/3) ... [2021-02-23 13:34:25,152 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2021-02-23 13:34:25,165 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:34:25,174 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:34:25,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:34:25,277 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:34:25,277 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:34:25,277 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:34:25,278 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:34:25,278 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:34:25,278 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:34:25,278 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:34:25,279 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:34:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-23 13:34:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:25,330 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:25,332 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash 957163615, now seen corresponding path program 1 times [2021-02-23 13:34:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22280303] [2021-02-23 13:34:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22280303] [2021-02-23 13:34:25,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809767179] [2021-02-23 13:34:25,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,933 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2021-02-23 13:34:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,394 INFO L93 Difference]: Finished difference Result 76 states and 127 transitions. [2021-02-23 13:34:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,409 INFO L225 Difference]: With dead ends: 76 [2021-02-23 13:34:26,409 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 13:34:26,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 13:34:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2021-02-23 13:34:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 13:34:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 74 transitions. [2021-02-23 13:34:26,473 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 74 transitions. Word has length 19 [2021-02-23 13:34:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,477 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 74 transitions. [2021-02-23 13:34:26,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 74 transitions. [2021-02-23 13:34:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:26,479 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:26,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:34:26,480 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1658228193, now seen corresponding path program 1 times [2021-02-23 13:34:26,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651777864] [2021-02-23 13:34:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:26,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:26,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651777864] [2021-02-23 13:34:26,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:26,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370424748] [2021-02-23 13:34:26,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:26,670 INFO L87 Difference]: Start difference. First operand 43 states and 74 transitions. Second operand 4 states. [2021-02-23 13:34:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,956 INFO L93 Difference]: Finished difference Result 98 states and 173 transitions. [2021-02-23 13:34:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,960 INFO L225 Difference]: With dead ends: 98 [2021-02-23 13:34:26,960 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 13:34:26,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 13:34:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-23 13:34:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 13:34:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-02-23 13:34:26,978 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 19 [2021-02-23 13:34:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,979 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-02-23 13:34:26,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-02-23 13:34:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:26,980 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,980 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] [2021-02-23 13:34:26,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:34:26,981 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash -392484976, now seen corresponding path program 1 times [2021-02-23 13:34:26,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084577318] [2021-02-23 13:34:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:27,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:27,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084577318] [2021-02-23 13:34:27,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:27,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533895896] [2021-02-23 13:34:27,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:27,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:27,134 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand 4 states. [2021-02-23 13:34:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:27,360 INFO L93 Difference]: Finished difference Result 91 states and 154 transitions. [2021-02-23 13:34:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:27,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:27,363 INFO L225 Difference]: With dead ends: 91 [2021-02-23 13:34:27,363 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 13:34:27,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 13:34:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-02-23 13:34:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 13:34:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 104 transitions. [2021-02-23 13:34:27,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 104 transitions. Word has length 20 [2021-02-23 13:34:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:27,377 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 104 transitions. [2021-02-23 13:34:27,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2021-02-23 13:34:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:27,378 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:27,378 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] [2021-02-23 13:34:27,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:34:27,379 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -134319538, now seen corresponding path program 1 times [2021-02-23 13:34:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:27,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965330292] [2021-02-23 13:34:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:27,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:27,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965330292] [2021-02-23 13:34:27,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:27,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434786724] [2021-02-23 13:34:27,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:27,489 INFO L87 Difference]: Start difference. First operand 62 states and 104 transitions. Second operand 4 states. [2021-02-23 13:34:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:27,726 INFO L93 Difference]: Finished difference Result 166 states and 288 transitions. [2021-02-23 13:34:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:27,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:27,728 INFO L225 Difference]: With dead ends: 166 [2021-02-23 13:34:27,728 INFO L226 Difference]: Without dead ends: 113 [2021-02-23 13:34:27,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-23 13:34:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-02-23 13:34:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-23 13:34:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 189 transitions. [2021-02-23 13:34:27,745 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 189 transitions. Word has length 20 [2021-02-23 13:34:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:27,745 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 189 transitions. [2021-02-23 13:34:27,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 189 transitions. [2021-02-23 13:34:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:27,747 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:27,747 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] [2021-02-23 13:34:27,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:34:27,747 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:27,748 INFO L82 PathProgramCache]: Analyzing trace with hash -835384116, now seen corresponding path program 1 times [2021-02-23 13:34:27,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:27,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855245556] [2021-02-23 13:34:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:27,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:27,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855245556] [2021-02-23 13:34:27,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:27,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084138057] [2021-02-23 13:34:27,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:27,842 INFO L87 Difference]: Start difference. First operand 111 states and 189 transitions. Second operand 4 states. [2021-02-23 13:34:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:28,061 INFO L93 Difference]: Finished difference Result 143 states and 243 transitions. [2021-02-23 13:34:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:28,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:28,064 INFO L225 Difference]: With dead ends: 143 [2021-02-23 13:34:28,064 INFO L226 Difference]: Without dead ends: 141 [2021-02-23 13:34:28,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-23 13:34:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2021-02-23 13:34:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-23 13:34:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 187 transitions. [2021-02-23 13:34:28,078 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 187 transitions. Word has length 20 [2021-02-23 13:34:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:28,079 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 187 transitions. [2021-02-23 13:34:28,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 187 transitions. [2021-02-23 13:34:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:28,081 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:28,081 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] [2021-02-23 13:34:28,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:34:28,081 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash 131275990, now seen corresponding path program 1 times [2021-02-23 13:34:28,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:28,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986319246] [2021-02-23 13:34:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:28,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986319246] [2021-02-23 13:34:28,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:28,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730521694] [2021-02-23 13:34:28,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:28,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:28,219 INFO L87 Difference]: Start difference. First operand 111 states and 187 transitions. Second operand 4 states. [2021-02-23 13:34:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:28,387 INFO L93 Difference]: Finished difference Result 203 states and 347 transitions. [2021-02-23 13:34:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:28,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:28,390 INFO L225 Difference]: With dead ends: 203 [2021-02-23 13:34:28,390 INFO L226 Difference]: Without dead ends: 201 [2021-02-23 13:34:28,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-23 13:34:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2021-02-23 13:34:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-02-23 13:34:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 253 transitions. [2021-02-23 13:34:28,409 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 253 transitions. Word has length 21 [2021-02-23 13:34:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:28,410 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 253 transitions. [2021-02-23 13:34:28,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 253 transitions. [2021-02-23 13:34:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:28,422 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:28,422 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] [2021-02-23 13:34:28,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:34:28,423 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 832340568, now seen corresponding path program 1 times [2021-02-23 13:34:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:28,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8124077] [2021-02-23 13:34:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:28,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:28,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8124077] [2021-02-23 13:34:28,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:28,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:28,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418834447] [2021-02-23 13:34:28,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:28,528 INFO L87 Difference]: Start difference. First operand 151 states and 253 transitions. Second operand 4 states. [2021-02-23 13:34:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:28,697 INFO L93 Difference]: Finished difference Result 351 states and 595 transitions. [2021-02-23 13:34:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:28,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:28,700 INFO L225 Difference]: With dead ends: 351 [2021-02-23 13:34:28,700 INFO L226 Difference]: Without dead ends: 209 [2021-02-23 13:34:28,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-23 13:34:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-02-23 13:34:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-23 13:34:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 343 transitions. [2021-02-23 13:34:28,717 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 343 transitions. Word has length 21 [2021-02-23 13:34:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:28,718 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 343 transitions. [2021-02-23 13:34:28,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 343 transitions. [2021-02-23 13:34:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:28,720 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:28,720 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] [2021-02-23 13:34:28,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:34:28,720 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash -225196893, now seen corresponding path program 1 times [2021-02-23 13:34:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:28,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088254351] [2021-02-23 13:34:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:28,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:28,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:28,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:28,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088254351] [2021-02-23 13:34:28,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:28,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:28,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981751913] [2021-02-23 13:34:28,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:28,787 INFO L87 Difference]: Start difference. First operand 207 states and 343 transitions. Second operand 4 states. [2021-02-23 13:34:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:28,935 INFO L93 Difference]: Finished difference Result 313 states and 517 transitions. [2021-02-23 13:34:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:28,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:28,938 INFO L225 Difference]: With dead ends: 313 [2021-02-23 13:34:28,938 INFO L226 Difference]: Without dead ends: 215 [2021-02-23 13:34:28,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-23 13:34:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-02-23 13:34:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-23 13:34:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 347 transitions. [2021-02-23 13:34:28,970 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 347 transitions. Word has length 22 [2021-02-23 13:34:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:28,971 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 347 transitions. [2021-02-23 13:34:28,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 347 transitions. [2021-02-23 13:34:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:28,979 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:28,979 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] [2021-02-23 13:34:28,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 13:34:28,980 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 32968545, now seen corresponding path program 1 times [2021-02-23 13:34:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:28,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759225916] [2021-02-23 13:34:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:29,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759225916] [2021-02-23 13:34:29,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:29,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:29,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801009969] [2021-02-23 13:34:29,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:29,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:29,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:29,061 INFO L87 Difference]: Start difference. First operand 213 states and 347 transitions. Second operand 4 states. [2021-02-23 13:34:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:29,218 INFO L93 Difference]: Finished difference Result 381 states and 629 transitions. [2021-02-23 13:34:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:29,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:29,224 INFO L225 Difference]: With dead ends: 381 [2021-02-23 13:34:29,224 INFO L226 Difference]: Without dead ends: 379 [2021-02-23 13:34:29,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-02-23 13:34:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 297. [2021-02-23 13:34:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2021-02-23 13:34:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 475 transitions. [2021-02-23 13:34:29,249 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 475 transitions. Word has length 22 [2021-02-23 13:34:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:29,249 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 475 transitions. [2021-02-23 13:34:29,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 475 transitions. [2021-02-23 13:34:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:29,251 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:29,251 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] [2021-02-23 13:34:29,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 13:34:29,252 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash 734033123, now seen corresponding path program 1 times [2021-02-23 13:34:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:29,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073482082] [2021-02-23 13:34:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:29,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:29,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073482082] [2021-02-23 13:34:29,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:29,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853879356] [2021-02-23 13:34:29,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:29,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:29,334 INFO L87 Difference]: Start difference. First operand 297 states and 475 transitions. Second operand 4 states. [2021-02-23 13:34:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:29,496 INFO L93 Difference]: Finished difference Result 685 states and 1101 transitions. [2021-02-23 13:34:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:29,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:29,500 INFO L225 Difference]: With dead ends: 685 [2021-02-23 13:34:29,500 INFO L226 Difference]: Without dead ends: 403 [2021-02-23 13:34:29,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-23 13:34:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 401. [2021-02-23 13:34:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2021-02-23 13:34:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 631 transitions. [2021-02-23 13:34:29,527 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 631 transitions. Word has length 22 [2021-02-23 13:34:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:29,529 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 631 transitions. [2021-02-23 13:34:29,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 631 transitions. [2021-02-23 13:34:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:29,534 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:29,534 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] [2021-02-23 13:34:29,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 13:34:29,535 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1022239949, now seen corresponding path program 1 times [2021-02-23 13:34:29,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:29,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123505512] [2021-02-23 13:34:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:29,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:29,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123505512] [2021-02-23 13:34:29,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:29,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:29,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309169713] [2021-02-23 13:34:29,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:29,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:29,605 INFO L87 Difference]: Start difference. First operand 401 states and 631 transitions. Second operand 4 states. [2021-02-23 13:34:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:29,748 INFO L93 Difference]: Finished difference Result 601 states and 941 transitions. [2021-02-23 13:34:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:29,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:29,752 INFO L225 Difference]: With dead ends: 601 [2021-02-23 13:34:29,752 INFO L226 Difference]: Without dead ends: 411 [2021-02-23 13:34:29,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-23 13:34:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2021-02-23 13:34:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2021-02-23 13:34:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 631 transitions. [2021-02-23 13:34:29,775 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 631 transitions. Word has length 23 [2021-02-23 13:34:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:29,776 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 631 transitions. [2021-02-23 13:34:29,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 631 transitions. [2021-02-23 13:34:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:29,777 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:29,777 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] [2021-02-23 13:34:29,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 13:34:29,778 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:29,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1280405387, now seen corresponding path program 1 times [2021-02-23 13:34:29,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:29,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289889191] [2021-02-23 13:34:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:29,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:29,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:29,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:29,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289889191] [2021-02-23 13:34:29,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:29,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310643584] [2021-02-23 13:34:29,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:29,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:29,868 INFO L87 Difference]: Start difference. First operand 409 states and 631 transitions. Second operand 4 states. [2021-02-23 13:34:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:30,032 INFO L93 Difference]: Finished difference Result 717 states and 1121 transitions. [2021-02-23 13:34:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:30,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:30,038 INFO L225 Difference]: With dead ends: 717 [2021-02-23 13:34:30,038 INFO L226 Difference]: Without dead ends: 715 [2021-02-23 13:34:30,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-02-23 13:34:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 585. [2021-02-23 13:34:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-02-23 13:34:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 879 transitions. [2021-02-23 13:34:30,080 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 879 transitions. Word has length 23 [2021-02-23 13:34:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:30,080 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 879 transitions. [2021-02-23 13:34:30,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 879 transitions. [2021-02-23 13:34:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:30,083 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:30,083 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] [2021-02-23 13:34:30,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 13:34:30,084 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1981469965, now seen corresponding path program 1 times [2021-02-23 13:34:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:30,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992570535] [2021-02-23 13:34:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:30,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992570535] [2021-02-23 13:34:30,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:30,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:30,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701807419] [2021-02-23 13:34:30,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:30,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:30,173 INFO L87 Difference]: Start difference. First operand 585 states and 879 transitions. Second operand 4 states. [2021-02-23 13:34:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:30,327 INFO L93 Difference]: Finished difference Result 1341 states and 2017 transitions. [2021-02-23 13:34:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:30,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:30,332 INFO L225 Difference]: With dead ends: 1341 [2021-02-23 13:34:30,332 INFO L226 Difference]: Without dead ends: 779 [2021-02-23 13:34:30,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-23 13:34:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2021-02-23 13:34:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2021-02-23 13:34:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1143 transitions. [2021-02-23 13:34:30,379 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1143 transitions. Word has length 23 [2021-02-23 13:34:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:30,379 INFO L480 AbstractCegarLoop]: Abstraction has 777 states and 1143 transitions. [2021-02-23 13:34:30,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1143 transitions. [2021-02-23 13:34:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:30,381 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:30,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:30,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 13:34:30,382 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1038076728, now seen corresponding path program 1 times [2021-02-23 13:34:30,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:30,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587692588] [2021-02-23 13:34:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:30,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:30,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587692588] [2021-02-23 13:34:30,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:30,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:30,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023370257] [2021-02-23 13:34:30,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:30,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:30,447 INFO L87 Difference]: Start difference. First operand 777 states and 1143 transitions. Second operand 4 states. [2021-02-23 13:34:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:30,594 INFO L93 Difference]: Finished difference Result 1165 states and 1705 transitions. [2021-02-23 13:34:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:30,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:30,599 INFO L225 Difference]: With dead ends: 1165 [2021-02-23 13:34:30,599 INFO L226 Difference]: Without dead ends: 795 [2021-02-23 13:34:30,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-02-23 13:34:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2021-02-23 13:34:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2021-02-23 13:34:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1143 transitions. [2021-02-23 13:34:30,641 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1143 transitions. Word has length 24 [2021-02-23 13:34:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:30,641 INFO L480 AbstractCegarLoop]: Abstraction has 793 states and 1143 transitions. [2021-02-23 13:34:30,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1143 transitions. [2021-02-23 13:34:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:30,643 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:30,643 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] [2021-02-23 13:34:30,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 13:34:30,644 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1296242166, now seen corresponding path program 1 times [2021-02-23 13:34:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:30,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829666757] [2021-02-23 13:34:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:30,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:30,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829666757] [2021-02-23 13:34:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:30,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:30,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489866994] [2021-02-23 13:34:30,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:30,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:30,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:30,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:30,704 INFO L87 Difference]: Start difference. First operand 793 states and 1143 transitions. Second operand 4 states. [2021-02-23 13:34:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:30,887 INFO L93 Difference]: Finished difference Result 1357 states and 1977 transitions. [2021-02-23 13:34:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:30,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:30,896 INFO L225 Difference]: With dead ends: 1357 [2021-02-23 13:34:30,896 INFO L226 Difference]: Without dead ends: 1355 [2021-02-23 13:34:30,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-23 13:34:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1161. [2021-02-23 13:34:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2021-02-23 13:34:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1623 transitions. [2021-02-23 13:34:30,946 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1623 transitions. Word has length 24 [2021-02-23 13:34:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:30,947 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 1623 transitions. [2021-02-23 13:34:30,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1623 transitions. [2021-02-23 13:34:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:30,950 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:30,950 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] [2021-02-23 13:34:30,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 13:34:30,951 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:30,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1997306744, now seen corresponding path program 1 times [2021-02-23 13:34:30,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:30,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202580493] [2021-02-23 13:34:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:30,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:30,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:30,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:30,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:31,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202580493] [2021-02-23 13:34:31,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:31,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:31,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659654201] [2021-02-23 13:34:31,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:31,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:31,009 INFO L87 Difference]: Start difference. First operand 1161 states and 1623 transitions. Second operand 4 states. [2021-02-23 13:34:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:31,182 INFO L93 Difference]: Finished difference Result 2637 states and 3673 transitions. [2021-02-23 13:34:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:31,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:31,191 INFO L225 Difference]: With dead ends: 2637 [2021-02-23 13:34:31,191 INFO L226 Difference]: Without dead ends: 1515 [2021-02-23 13:34:31,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-02-23 13:34:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1513. [2021-02-23 13:34:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2021-02-23 13:34:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2055 transitions. [2021-02-23 13:34:31,264 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2055 transitions. Word has length 24 [2021-02-23 13:34:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:31,264 INFO L480 AbstractCegarLoop]: Abstraction has 1513 states and 2055 transitions. [2021-02-23 13:34:31,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2055 transitions. [2021-02-23 13:34:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:31,267 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:31,268 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] [2021-02-23 13:34:31,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 13:34:31,268 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1529017218, now seen corresponding path program 1 times [2021-02-23 13:34:31,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:31,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166768077] [2021-02-23 13:34:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:31,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166768077] [2021-02-23 13:34:31,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:31,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320256328] [2021-02-23 13:34:31,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:31,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:31,328 INFO L87 Difference]: Start difference. First operand 1513 states and 2055 transitions. Second operand 4 states. [2021-02-23 13:34:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:31,516 INFO L93 Difference]: Finished difference Result 2269 states and 3065 transitions. [2021-02-23 13:34:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:31,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:31,527 INFO L225 Difference]: With dead ends: 2269 [2021-02-23 13:34:31,528 INFO L226 Difference]: Without dead ends: 1547 [2021-02-23 13:34:31,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-02-23 13:34:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1545. [2021-02-23 13:34:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2021-02-23 13:34:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2055 transitions. [2021-02-23 13:34:31,620 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2055 transitions. Word has length 25 [2021-02-23 13:34:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:31,620 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 2055 transitions. [2021-02-23 13:34:31,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2055 transitions. [2021-02-23 13:34:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:31,624 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:31,624 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] [2021-02-23 13:34:31,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 13:34:31,625 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1787182656, now seen corresponding path program 1 times [2021-02-23 13:34:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:31,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099915774] [2021-02-23 13:34:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:31,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:31,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099915774] [2021-02-23 13:34:31,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:31,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:31,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401729506] [2021-02-23 13:34:31,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:31,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:31,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:31,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:31,684 INFO L87 Difference]: Start difference. First operand 1545 states and 2055 transitions. Second operand 4 states. [2021-02-23 13:34:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:31,886 INFO L93 Difference]: Finished difference Result 2573 states and 3433 transitions. [2021-02-23 13:34:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:31,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:31,903 INFO L225 Difference]: With dead ends: 2573 [2021-02-23 13:34:31,903 INFO L226 Difference]: Without dead ends: 2571 [2021-02-23 13:34:31,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-02-23 13:34:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2313. [2021-02-23 13:34:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2313 states. [2021-02-23 13:34:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2983 transitions. [2021-02-23 13:34:32,010 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2983 transitions. Word has length 25 [2021-02-23 13:34:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,011 INFO L480 AbstractCegarLoop]: Abstraction has 2313 states and 2983 transitions. [2021-02-23 13:34:32,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2983 transitions. [2021-02-23 13:34:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:32,017 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,017 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] [2021-02-23 13:34:32,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 13:34:32,018 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1806720062, now seen corresponding path program 1 times [2021-02-23 13:34:32,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801978586] [2021-02-23 13:34:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:32,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:32,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801978586] [2021-02-23 13:34:32,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542641943] [2021-02-23 13:34:32,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,077 INFO L87 Difference]: Start difference. First operand 2313 states and 2983 transitions. Second operand 4 states. [2021-02-23 13:34:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:32,302 INFO L93 Difference]: Finished difference Result 5197 states and 6633 transitions. [2021-02-23 13:34:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:32,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:32,320 INFO L225 Difference]: With dead ends: 5197 [2021-02-23 13:34:32,321 INFO L226 Difference]: Without dead ends: 2955 [2021-02-23 13:34:32,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-02-23 13:34:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2953. [2021-02-23 13:34:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2953 states. [2021-02-23 13:34:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 3655 transitions. [2021-02-23 13:34:32,464 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 3655 transitions. Word has length 25 [2021-02-23 13:34:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,464 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 3655 transitions. [2021-02-23 13:34:32,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 3655 transitions. [2021-02-23 13:34:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:32,470 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,470 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] [2021-02-23 13:34:32,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 13:34:32,471 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash -431696435, now seen corresponding path program 1 times [2021-02-23 13:34:32,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046288563] [2021-02-23 13:34:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:32,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:32,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046288563] [2021-02-23 13:34:32,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269536144] [2021-02-23 13:34:32,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,530 INFO L87 Difference]: Start difference. First operand 2953 states and 3655 transitions. Second operand 4 states. [2021-02-23 13:34:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:32,725 INFO L93 Difference]: Finished difference Result 4429 states and 5449 transitions. [2021-02-23 13:34:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:32,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:32,742 INFO L225 Difference]: With dead ends: 4429 [2021-02-23 13:34:32,742 INFO L226 Difference]: Without dead ends: 3019 [2021-02-23 13:34:32,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-02-23 13:34:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3017. [2021-02-23 13:34:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2021-02-23 13:34:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3655 transitions. [2021-02-23 13:34:32,947 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3655 transitions. Word has length 26 [2021-02-23 13:34:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,947 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 3655 transitions. [2021-02-23 13:34:32,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3655 transitions. [2021-02-23 13:34:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:32,953 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,953 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] [2021-02-23 13:34:32,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 13:34:32,955 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,956 INFO L82 PathProgramCache]: Analyzing trace with hash -173530997, now seen corresponding path program 1 times [2021-02-23 13:34:32,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082144747] [2021-02-23 13:34:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:33,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:33,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082144747] [2021-02-23 13:34:33,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183530347] [2021-02-23 13:34:33,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,053 INFO L87 Difference]: Start difference. First operand 3017 states and 3655 transitions. Second operand 4 states. [2021-02-23 13:34:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,327 INFO L93 Difference]: Finished difference Result 4875 states and 5832 transitions. [2021-02-23 13:34:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,354 INFO L225 Difference]: With dead ends: 4875 [2021-02-23 13:34:33,355 INFO L226 Difference]: Without dead ends: 4873 [2021-02-23 13:34:33,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-02-23 13:34:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4617. [2021-02-23 13:34:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4617 states. [2021-02-23 13:34:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 5447 transitions. [2021-02-23 13:34:33,633 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 5447 transitions. Word has length 26 [2021-02-23 13:34:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,633 INFO L480 AbstractCegarLoop]: Abstraction has 4617 states and 5447 transitions. [2021-02-23 13:34:33,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 5447 transitions. [2021-02-23 13:34:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:33,642 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,643 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] [2021-02-23 13:34:33,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 13:34:33,643 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash 527533581, now seen corresponding path program 1 times [2021-02-23 13:34:33,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266151141] [2021-02-23 13:34:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:33,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:33,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266151141] [2021-02-23 13:34:33,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733580967] [2021-02-23 13:34:33,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,707 INFO L87 Difference]: Start difference. First operand 4617 states and 5447 transitions. Second operand 4 states. [2021-02-23 13:34:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:34,024 INFO L93 Difference]: Finished difference Result 10249 states and 11847 transitions. [2021-02-23 13:34:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:34,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:34,025 INFO L225 Difference]: With dead ends: 10249 [2021-02-23 13:34:34,025 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:34:34,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:34:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:34:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:34:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:34:34,045 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-02-23 13:34:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:34,045 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:34:34,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:34:34,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:34:34,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-23 13:34:34,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:34:40,331 WARN L202 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 1093 DAG size of output: 32 [2021-02-23 13:34:40,370 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:34:40,370 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:34:40,371 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:34:40,371 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:40,371 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:34:40,372 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:40,372 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:40,372 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:34:40,372 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:34:40,372 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point L93(line 93) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 137) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point L118(line 118) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point L102-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L192 CegarLoopUtils]: At program point L127-1(lines 35 132) the Hoare annotation is: true [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point L86-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,373 INFO L189 CegarLoopUtils]: For program point L78-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L103(line 103) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L37(lines 37 39) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L70-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L128(line 128) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L185 CegarLoopUtils]: At program point L128-1(lines 7 137) the Hoare annotation is: false [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L62-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point L112-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 137) no Hoare annotation was computed. [2021-02-23 13:34:40,374 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 135) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 137) the Hoare annotation is: true [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L113(line 113) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L97-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L122-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L98(line 98) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L123(line 123) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L82-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,375 INFO L189 CegarLoopUtils]: For program point L107-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L74-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L66-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L58(lines 58 60) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L58-2(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L108(line 108) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L192 CegarLoopUtils]: At program point L133(lines 7 137) the Hoare annotation is: true [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L92-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,376 INFO L189 CegarLoopUtils]: For program point L117-1(lines 35 132) no Hoare annotation was computed. [2021-02-23 13:34:40,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:34:40 BoogieIcfgContainer [2021-02-23 13:34:40,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:34:40,391 INFO L168 Benchmark]: Toolchain (without parser) took 16755.55 ms. Allocated memory was 162.5 MB in the beginning and 513.8 MB in the end (delta: 351.3 MB). Free memory was 138.7 MB in the beginning and 434.5 MB in the end (delta: -295.8 MB). Peak memory consumption was 311.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:40,392 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:34:40,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.62 ms. Allocated memory is still 162.5 MB. Free memory was 137.5 MB in the beginning and 127.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:40,392 INFO L168 Benchmark]: Boogie Preprocessor took 63.93 ms. Allocated memory is still 162.5 MB. Free memory was 127.2 MB in the beginning and 125.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:40,393 INFO L168 Benchmark]: RCFGBuilder took 1051.14 ms. Allocated memory is still 162.5 MB. Free memory was 125.5 MB in the beginning and 138.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:40,393 INFO L168 Benchmark]: TraceAbstraction took 15250.44 ms. Allocated memory was 162.5 MB in the beginning and 513.8 MB in the end (delta: 351.3 MB). Free memory was 138.0 MB in the beginning and 434.5 MB in the end (delta: -296.5 MB). Peak memory consumption was 309.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:40,394 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 162.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 363.62 ms. Allocated memory is still 162.5 MB. Free memory was 137.5 MB in the beginning and 127.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.93 ms. Allocated memory is still 162.5 MB. Free memory was 127.2 MB in the beginning and 125.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1051.14 ms. Allocated memory is still 162.5 MB. Free memory was 125.5 MB in the beginning and 138.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15250.44 ms. Allocated memory was 162.5 MB in the beginning and 513.8 MB in the end (delta: 351.3 MB). Free memory was 138.0 MB in the beginning and 434.5 MB in the end (delta: -296.5 MB). Peak memory consumption was 309.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 135]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1542 SDtfs, 2238 SDslu, 136 SDs, 0 SdLazy, 1125 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4617occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 1044 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3426278 FormulaSimplificationTreeSizeReduction, 6.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 33900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...