/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:23:31,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:23:31,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:23:31,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:23:31,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:23:31,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:23:31,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:23:31,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:23:31,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:23:31,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:23:31,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:23:31,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 18:23:31,669 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 [2020-10-23 18:23:31,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:23:31,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:23:31,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:23:31,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:23:31,726 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:23:31,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:23:31,727 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:23:31,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:23:31,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:23:31,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:23:31,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:23:31,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:23:31,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:23:31,729 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:23:31,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:23:31,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:23:31,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:23:31,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:23:31,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:23:31,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:23:31,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:23:31,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:23:31,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:23:31,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:23:31,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:23:31,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:23:31,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:23:31,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:23:31,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:23:31,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:23:32,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:23:32,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:23:32,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:23:32,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:23:32,182 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:23:32,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-10-23 18:23:32,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f296e02/ece86bc9139146beb1b75bfd7e42a5d9/FLAGea6c3e51c [2020-10-23 18:23:32,878 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:23:32,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-10-23 18:23:32,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f296e02/ece86bc9139146beb1b75bfd7e42a5d9/FLAGea6c3e51c [2020-10-23 18:23:33,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f296e02/ece86bc9139146beb1b75bfd7e42a5d9 [2020-10-23 18:23:33,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:23:33,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:23:33,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:33,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:23:33,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:23:33,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df95ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33, skipping insertion in model container [2020-10-23 18:23:33,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:23:33,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:23:33,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:33,489 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:23:33,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:33,533 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:23:33,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33 WrapperNode [2020-10-23 18:23:33,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:33,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:23:33,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:23:33,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:23:33,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... [2020-10-23 18:23:33,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:23:33,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:23:33,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:23:33,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:23:33,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:23:33,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:23:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:23:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:23:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:23:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:23:33,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:23:33,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:23:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:23:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:23:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:23:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:23:34,123 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:23:34,124 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:23:34,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:34 BoogieIcfgContainer [2020-10-23 18:23:34,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:23:34,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:23:34,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:23:34,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:23:34,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:23:33" (1/3) ... [2020-10-23 18:23:34,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56114f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:34, skipping insertion in model container [2020-10-23 18:23:34,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:33" (2/3) ... [2020-10-23 18:23:34,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56114f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:34, skipping insertion in model container [2020-10-23 18:23:34,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:34" (3/3) ... [2020-10-23 18:23:34,134 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-23 18:23:34,146 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:23:34,152 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:23:34,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:23:34,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:23:34,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:23:34,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:23:34,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:23:34,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:23:34,195 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:23:34,195 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:23:34,195 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:23:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-23 18:23:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:23:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:34,220 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] [2020-10-23 18:23:34,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2059309882, now seen corresponding path program 1 times [2020-10-23 18:23:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:34,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438090469] [2020-10-23 18:23:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:34,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438090469] [2020-10-23 18:23:34,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:34,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560885944] [2020-10-23 18:23:34,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:34,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:34,632 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2020-10-23 18:23:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:34,918 INFO L93 Difference]: Finished difference Result 98 states and 169 transitions. [2020-10-23 18:23:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:34,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:23:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:34,933 INFO L225 Difference]: With dead ends: 98 [2020-10-23 18:23:34,933 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 18:23:34,937 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 [2020-10-23 18:23:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 18:23:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-23 18:23:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:23:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-10-23 18:23:34,986 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-10-23 18:23:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:34,986 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-10-23 18:23:34,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-10-23 18:23:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:23:34,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:34,988 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] [2020-10-23 18:23:34,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:23:34,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:34,990 INFO L82 PathProgramCache]: Analyzing trace with hash 955793736, now seen corresponding path program 1 times [2020-10-23 18:23:34,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:34,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230328184] [2020-10-23 18:23:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:35,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230328184] [2020-10-23 18:23:35,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:35,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:35,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042604892] [2020-10-23 18:23:35,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:35,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:35,119 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-10-23 18:23:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:35,404 INFO L93 Difference]: Finished difference Result 129 states and 235 transitions. [2020-10-23 18:23:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:35,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:23:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:35,409 INFO L225 Difference]: With dead ends: 129 [2020-10-23 18:23:35,410 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 18:23:35,412 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 [2020-10-23 18:23:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 18:23:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-23 18:23:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-23 18:23:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-10-23 18:23:35,438 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-10-23 18:23:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:35,438 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-10-23 18:23:35,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-10-23 18:23:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:23:35,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:35,442 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] [2020-10-23 18:23:35,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:23:35,442 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash 592501448, now seen corresponding path program 1 times [2020-10-23 18:23:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:35,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755630043] [2020-10-23 18:23:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755630043] [2020-10-23 18:23:35,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:35,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450134084] [2020-10-23 18:23:35,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:35,589 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-10-23 18:23:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:35,799 INFO L93 Difference]: Finished difference Result 119 states and 210 transitions. [2020-10-23 18:23:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:35,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:23:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:35,804 INFO L225 Difference]: With dead ends: 119 [2020-10-23 18:23:35,804 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 18:23:35,807 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 [2020-10-23 18:23:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 18:23:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-23 18:23:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-23 18:23:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-10-23 18:23:35,828 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-10-23 18:23:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:35,828 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-10-23 18:23:35,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-10-23 18:23:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:23:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:35,830 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] [2020-10-23 18:23:35,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:23:35,831 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -428566906, now seen corresponding path program 1 times [2020-10-23 18:23:35,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379250389] [2020-10-23 18:23:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:35,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379250389] [2020-10-23 18:23:35,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:35,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:35,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270267328] [2020-10-23 18:23:35,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:35,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:35,940 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-10-23 18:23:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:36,122 INFO L93 Difference]: Finished difference Result 221 states and 398 transitions. [2020-10-23 18:23:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:36,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:23:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:36,125 INFO L225 Difference]: With dead ends: 221 [2020-10-23 18:23:36,125 INFO L226 Difference]: Without dead ends: 149 [2020-10-23 18:23:36,127 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 [2020-10-23 18:23:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-23 18:23:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-23 18:23:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-23 18:23:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-10-23 18:23:36,144 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-10-23 18:23:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:36,144 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-10-23 18:23:36,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-10-23 18:23:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:23:36,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:36,146 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] [2020-10-23 18:23:36,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:23:36,146 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash 851296772, now seen corresponding path program 1 times [2020-10-23 18:23:36,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:36,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510522334] [2020-10-23 18:23:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:36,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510522334] [2020-10-23 18:23:36,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:36,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:36,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507968515] [2020-10-23 18:23:36,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:36,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:36,207 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-10-23 18:23:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:36,370 INFO L93 Difference]: Finished difference Result 192 states and 341 transitions. [2020-10-23 18:23:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:36,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:23:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:36,373 INFO L225 Difference]: With dead ends: 192 [2020-10-23 18:23:36,373 INFO L226 Difference]: Without dead ends: 189 [2020-10-23 18:23:36,373 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 [2020-10-23 18:23:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-23 18:23:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-10-23 18:23:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-23 18:23:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-10-23 18:23:36,385 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-10-23 18:23:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:36,386 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-10-23 18:23:36,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-10-23 18:23:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:23:36,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:36,387 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] [2020-10-23 18:23:36,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:23:36,388 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:36,388 INFO L82 PathProgramCache]: Analyzing trace with hash -394063277, now seen corresponding path program 1 times [2020-10-23 18:23:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:36,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871998137] [2020-10-23 18:23:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:36,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871998137] [2020-10-23 18:23:36,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:36,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222393238] [2020-10-23 18:23:36,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:36,448 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-10-23 18:23:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:36,598 INFO L93 Difference]: Finished difference Result 276 states and 493 transitions. [2020-10-23 18:23:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:36,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:23:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:36,601 INFO L225 Difference]: With dead ends: 276 [2020-10-23 18:23:36,601 INFO L226 Difference]: Without dead ends: 273 [2020-10-23 18:23:36,602 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 [2020-10-23 18:23:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-23 18:23:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-10-23 18:23:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-23 18:23:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-10-23 18:23:36,614 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-10-23 18:23:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:36,615 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-10-23 18:23:36,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-10-23 18:23:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:23:36,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:36,617 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] [2020-10-23 18:23:36,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:23:36,617 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1673926955, now seen corresponding path program 1 times [2020-10-23 18:23:36,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:36,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736132226] [2020-10-23 18:23:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:36,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736132226] [2020-10-23 18:23:36,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:36,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921762683] [2020-10-23 18:23:36,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:36,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:36,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:36,678 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-10-23 18:23:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:36,837 INFO L93 Difference]: Finished difference Result 472 states and 837 transitions. [2020-10-23 18:23:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:36,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:23:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:36,840 INFO L225 Difference]: With dead ends: 472 [2020-10-23 18:23:36,840 INFO L226 Difference]: Without dead ends: 281 [2020-10-23 18:23:36,841 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 [2020-10-23 18:23:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-23 18:23:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-10-23 18:23:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-23 18:23:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-10-23 18:23:36,854 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-10-23 18:23:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:36,855 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-10-23 18:23:36,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-10-23 18:23:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:23:36,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:36,857 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] [2020-10-23 18:23:36,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:23:36,857 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 675559793, now seen corresponding path program 1 times [2020-10-23 18:23:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432771186] [2020-10-23 18:23:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:36,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432771186] [2020-10-23 18:23:36,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:36,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:36,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631298511] [2020-10-23 18:23:36,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:36,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:36,910 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-10-23 18:23:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:37,067 INFO L93 Difference]: Finished difference Result 422 states and 735 transitions. [2020-10-23 18:23:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:37,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:23:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:37,070 INFO L225 Difference]: With dead ends: 422 [2020-10-23 18:23:37,070 INFO L226 Difference]: Without dead ends: 287 [2020-10-23 18:23:37,071 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 [2020-10-23 18:23:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-23 18:23:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-10-23 18:23:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-23 18:23:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 492 transitions. [2020-10-23 18:23:37,082 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 492 transitions. Word has length 26 [2020-10-23 18:23:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:37,083 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 492 transitions. [2020-10-23 18:23:37,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 492 transitions. [2020-10-23 18:23:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:23:37,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:37,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:37,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:23:37,085 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -345508561, now seen corresponding path program 1 times [2020-10-23 18:23:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788151024] [2020-10-23 18:23:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:37,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788151024] [2020-10-23 18:23:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:37,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652153472] [2020-10-23 18:23:37,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:37,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:37,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:37,137 INFO L87 Difference]: Start difference. First operand 286 states and 492 transitions. Second operand 4 states. [2020-10-23 18:23:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:37,280 INFO L93 Difference]: Finished difference Result 526 states and 919 transitions. [2020-10-23 18:23:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:37,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:23:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:37,284 INFO L225 Difference]: With dead ends: 526 [2020-10-23 18:23:37,284 INFO L226 Difference]: Without dead ends: 523 [2020-10-23 18:23:37,285 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 [2020-10-23 18:23:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-23 18:23:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 394. [2020-10-23 18:23:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-23 18:23:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 668 transitions. [2020-10-23 18:23:37,300 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 668 transitions. Word has length 26 [2020-10-23 18:23:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:37,300 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 668 transitions. [2020-10-23 18:23:37,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 668 transitions. [2020-10-23 18:23:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:23:37,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:37,302 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] [2020-10-23 18:23:37,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:23:37,303 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1625372239, now seen corresponding path program 1 times [2020-10-23 18:23:37,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:37,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284751259] [2020-10-23 18:23:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:37,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284751259] [2020-10-23 18:23:37,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:37,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:37,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81189916] [2020-10-23 18:23:37,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:37,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:37,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:37,355 INFO L87 Difference]: Start difference. First operand 394 states and 668 transitions. Second operand 4 states. [2020-10-23 18:23:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:37,518 INFO L93 Difference]: Finished difference Result 926 states and 1583 transitions. [2020-10-23 18:23:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:37,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:23:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:37,522 INFO L225 Difference]: With dead ends: 926 [2020-10-23 18:23:37,522 INFO L226 Difference]: Without dead ends: 547 [2020-10-23 18:23:37,523 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 [2020-10-23 18:23:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-23 18:23:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2020-10-23 18:23:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-23 18:23:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 920 transitions. [2020-10-23 18:23:37,543 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 920 transitions. Word has length 26 [2020-10-23 18:23:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:37,543 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 920 transitions. [2020-10-23 18:23:37,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 920 transitions. [2020-10-23 18:23:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:37,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:37,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:23:37,547 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2114200736, now seen corresponding path program 1 times [2020-10-23 18:23:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:37,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401079944] [2020-10-23 18:23:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:37,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401079944] [2020-10-23 18:23:37,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:37,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664300518] [2020-10-23 18:23:37,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:37,619 INFO L87 Difference]: Start difference. First operand 546 states and 920 transitions. Second operand 4 states. [2020-10-23 18:23:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:37,759 INFO L93 Difference]: Finished difference Result 818 states and 1375 transitions. [2020-10-23 18:23:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:37,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:37,762 INFO L225 Difference]: With dead ends: 818 [2020-10-23 18:23:37,763 INFO L226 Difference]: Without dead ends: 555 [2020-10-23 18:23:37,764 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 [2020-10-23 18:23:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-23 18:23:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-10-23 18:23:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-23 18:23:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 920 transitions. [2020-10-23 18:23:37,783 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 920 transitions. Word has length 27 [2020-10-23 18:23:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:37,783 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 920 transitions. [2020-10-23 18:23:37,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 920 transitions. [2020-10-23 18:23:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:37,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:37,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:37,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:23:37,785 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:37,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1159698206, now seen corresponding path program 1 times [2020-10-23 18:23:37,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:37,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972678741] [2020-10-23 18:23:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:37,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972678741] [2020-10-23 18:23:37,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:37,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:37,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782238095] [2020-10-23 18:23:37,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:37,848 INFO L87 Difference]: Start difference. First operand 554 states and 920 transitions. Second operand 4 states. [2020-10-23 18:23:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:38,003 INFO L93 Difference]: Finished difference Result 1006 states and 1699 transitions. [2020-10-23 18:23:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:38,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:38,009 INFO L225 Difference]: With dead ends: 1006 [2020-10-23 18:23:38,009 INFO L226 Difference]: Without dead ends: 1003 [2020-10-23 18:23:38,010 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 [2020-10-23 18:23:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-10-23 18:23:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 778. [2020-10-23 18:23:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-23 18:23:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1264 transitions. [2020-10-23 18:23:38,042 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1264 transitions. Word has length 27 [2020-10-23 18:23:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:38,042 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1264 transitions. [2020-10-23 18:23:38,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1264 transitions. [2020-10-23 18:23:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:38,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:38,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:38,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:23:38,044 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:38,046 INFO L82 PathProgramCache]: Analyzing trace with hash -120165472, now seen corresponding path program 1 times [2020-10-23 18:23:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:38,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712625298] [2020-10-23 18:23:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:38,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712625298] [2020-10-23 18:23:38,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:38,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:38,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941313375] [2020-10-23 18:23:38,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:38,130 INFO L87 Difference]: Start difference. First operand 778 states and 1264 transitions. Second operand 4 states. [2020-10-23 18:23:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:38,322 INFO L93 Difference]: Finished difference Result 1822 states and 2979 transitions. [2020-10-23 18:23:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:38,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:38,328 INFO L225 Difference]: With dead ends: 1822 [2020-10-23 18:23:38,329 INFO L226 Difference]: Without dead ends: 1067 [2020-10-23 18:23:38,331 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 [2020-10-23 18:23:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-23 18:23:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1066. [2020-10-23 18:23:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-10-23 18:23:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1720 transitions. [2020-10-23 18:23:38,371 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1720 transitions. Word has length 27 [2020-10-23 18:23:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:38,371 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1720 transitions. [2020-10-23 18:23:38,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1720 transitions. [2020-10-23 18:23:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:38,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:38,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:38,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:23:38,373 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1597546652, now seen corresponding path program 1 times [2020-10-23 18:23:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:38,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847227973] [2020-10-23 18:23:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847227973] [2020-10-23 18:23:38,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:38,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:38,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204360911] [2020-10-23 18:23:38,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:38,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:38,427 INFO L87 Difference]: Start difference. First operand 1066 states and 1720 transitions. Second operand 4 states. [2020-10-23 18:23:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:38,592 INFO L93 Difference]: Finished difference Result 1598 states and 2571 transitions. [2020-10-23 18:23:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:38,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:38,598 INFO L225 Difference]: With dead ends: 1598 [2020-10-23 18:23:38,598 INFO L226 Difference]: Without dead ends: 1083 [2020-10-23 18:23:38,599 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 [2020-10-23 18:23:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-10-23 18:23:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-10-23 18:23:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-10-23 18:23:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1720 transitions. [2020-10-23 18:23:38,637 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1720 transitions. Word has length 28 [2020-10-23 18:23:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:38,637 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1720 transitions. [2020-10-23 18:23:38,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1720 transitions. [2020-10-23 18:23:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:38,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:38,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:38,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:23:38,640 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash 576478298, now seen corresponding path program 1 times [2020-10-23 18:23:38,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:38,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799411629] [2020-10-23 18:23:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799411629] [2020-10-23 18:23:38,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:38,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:38,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234760096] [2020-10-23 18:23:38,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:38,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:38,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:38,693 INFO L87 Difference]: Start difference. First operand 1082 states and 1720 transitions. Second operand 4 states. [2020-10-23 18:23:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:38,886 INFO L93 Difference]: Finished difference Result 1934 states and 3131 transitions. [2020-10-23 18:23:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:38,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:38,895 INFO L225 Difference]: With dead ends: 1934 [2020-10-23 18:23:38,895 INFO L226 Difference]: Without dead ends: 1931 [2020-10-23 18:23:38,896 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 [2020-10-23 18:23:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-23 18:23:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-10-23 18:23:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-23 18:23:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2392 transitions. [2020-10-23 18:23:38,951 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2392 transitions. Word has length 28 [2020-10-23 18:23:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:38,952 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2392 transitions. [2020-10-23 18:23:38,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2392 transitions. [2020-10-23 18:23:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:38,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:38,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:38,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:23:38,955 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -703385380, now seen corresponding path program 1 times [2020-10-23 18:23:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:38,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749426056] [2020-10-23 18:23:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:39,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749426056] [2020-10-23 18:23:39,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:39,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:39,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343727126] [2020-10-23 18:23:39,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:39,002 INFO L87 Difference]: Start difference. First operand 1546 states and 2392 transitions. Second operand 4 states. [2020-10-23 18:23:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:39,181 INFO L93 Difference]: Finished difference Result 3598 states and 5595 transitions. [2020-10-23 18:23:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:39,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:39,191 INFO L225 Difference]: With dead ends: 3598 [2020-10-23 18:23:39,191 INFO L226 Difference]: Without dead ends: 2091 [2020-10-23 18:23:39,194 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 [2020-10-23 18:23:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-23 18:23:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-10-23 18:23:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-23 18:23:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3208 transitions. [2020-10-23 18:23:39,265 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3208 transitions. Word has length 28 [2020-10-23 18:23:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:39,266 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3208 transitions. [2020-10-23 18:23:39,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3208 transitions. [2020-10-23 18:23:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:39,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:39,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:39,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:23:39,269 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:39,270 INFO L82 PathProgramCache]: Analyzing trace with hash 697609259, now seen corresponding path program 1 times [2020-10-23 18:23:39,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:39,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807705580] [2020-10-23 18:23:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:39,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:39,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807705580] [2020-10-23 18:23:39,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:39,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:39,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973407244] [2020-10-23 18:23:39,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:39,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:39,349 INFO L87 Difference]: Start difference. First operand 2090 states and 3208 transitions. Second operand 4 states. [2020-10-23 18:23:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:39,540 INFO L93 Difference]: Finished difference Result 3134 states and 4795 transitions. [2020-10-23 18:23:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:39,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:39,552 INFO L225 Difference]: With dead ends: 3134 [2020-10-23 18:23:39,552 INFO L226 Difference]: Without dead ends: 2123 [2020-10-23 18:23:39,556 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 [2020-10-23 18:23:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-23 18:23:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2122. [2020-10-23 18:23:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-10-23 18:23:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3208 transitions. [2020-10-23 18:23:39,636 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3208 transitions. Word has length 29 [2020-10-23 18:23:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:39,636 INFO L481 AbstractCegarLoop]: Abstraction has 2122 states and 3208 transitions. [2020-10-23 18:23:39,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3208 transitions. [2020-10-23 18:23:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:39,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:39,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:39,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 18:23:39,639 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -323459095, now seen corresponding path program 1 times [2020-10-23 18:23:39,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:39,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404655335] [2020-10-23 18:23:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:39,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404655335] [2020-10-23 18:23:39,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:39,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:39,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80591475] [2020-10-23 18:23:39,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:39,694 INFO L87 Difference]: Start difference. First operand 2122 states and 3208 transitions. Second operand 4 states. [2020-10-23 18:23:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:39,926 INFO L93 Difference]: Finished difference Result 3726 states and 5739 transitions. [2020-10-23 18:23:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:39,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:39,943 INFO L225 Difference]: With dead ends: 3726 [2020-10-23 18:23:39,944 INFO L226 Difference]: Without dead ends: 3723 [2020-10-23 18:23:39,946 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 [2020-10-23 18:23:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-23 18:23:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3082. [2020-10-23 18:23:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3082 states. [2020-10-23 18:23:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4520 transitions. [2020-10-23 18:23:40,060 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4520 transitions. Word has length 29 [2020-10-23 18:23:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:40,060 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4520 transitions. [2020-10-23 18:23:40,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4520 transitions. [2020-10-23 18:23:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:40,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:40,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:40,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 18:23:40,065 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1603322773, now seen corresponding path program 1 times [2020-10-23 18:23:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:40,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113572984] [2020-10-23 18:23:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:40,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:40,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113572984] [2020-10-23 18:23:40,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:40,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995071637] [2020-10-23 18:23:40,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:40,120 INFO L87 Difference]: Start difference. First operand 3082 states and 4520 transitions. Second operand 4 states. [2020-10-23 18:23:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:40,328 INFO L93 Difference]: Finished difference Result 7118 states and 10475 transitions. [2020-10-23 18:23:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:40,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:40,346 INFO L225 Difference]: With dead ends: 7118 [2020-10-23 18:23:40,347 INFO L226 Difference]: Without dead ends: 4107 [2020-10-23 18:23:40,352 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 [2020-10-23 18:23:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-23 18:23:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4106. [2020-10-23 18:23:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-10-23 18:23:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5960 transitions. [2020-10-23 18:23:40,529 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5960 transitions. Word has length 29 [2020-10-23 18:23:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:40,529 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 5960 transitions. [2020-10-23 18:23:40,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5960 transitions. [2020-10-23 18:23:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:40,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:40,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:40,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 18:23:40,536 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:40,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1430635577, now seen corresponding path program 1 times [2020-10-23 18:23:40,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:40,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768424837] [2020-10-23 18:23:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:40,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:40,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768424837] [2020-10-23 18:23:40,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:40,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:40,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162219925] [2020-10-23 18:23:40,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:40,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:40,589 INFO L87 Difference]: Start difference. First operand 4106 states and 5960 transitions. Second operand 4 states. [2020-10-23 18:23:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:40,791 INFO L93 Difference]: Finished difference Result 6158 states and 8907 transitions. [2020-10-23 18:23:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:40,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:40,811 INFO L225 Difference]: With dead ends: 6158 [2020-10-23 18:23:40,811 INFO L226 Difference]: Without dead ends: 4171 [2020-10-23 18:23:40,815 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 [2020-10-23 18:23:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-10-23 18:23:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4170. [2020-10-23 18:23:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-23 18:23:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5960 transitions. [2020-10-23 18:23:40,956 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5960 transitions. Word has length 30 [2020-10-23 18:23:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:40,957 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5960 transitions. [2020-10-23 18:23:40,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5960 transitions. [2020-10-23 18:23:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:40,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:40,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:40,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 18:23:40,962 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1843263365, now seen corresponding path program 1 times [2020-10-23 18:23:40,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:40,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869473600] [2020-10-23 18:23:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:41,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869473600] [2020-10-23 18:23:41,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:41,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214883731] [2020-10-23 18:23:41,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:41,043 INFO L87 Difference]: Start difference. First operand 4170 states and 5960 transitions. Second operand 4 states. [2020-10-23 18:23:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:41,275 INFO L93 Difference]: Finished difference Result 7182 states and 10443 transitions. [2020-10-23 18:23:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:41,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:41,303 INFO L225 Difference]: With dead ends: 7182 [2020-10-23 18:23:41,303 INFO L226 Difference]: Without dead ends: 7179 [2020-10-23 18:23:41,308 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 [2020-10-23 18:23:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-10-23 18:23:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6154. [2020-10-23 18:23:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-10-23 18:23:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8520 transitions. [2020-10-23 18:23:41,485 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8520 transitions. Word has length 30 [2020-10-23 18:23:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:41,486 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 8520 transitions. [2020-10-23 18:23:41,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8520 transitions. [2020-10-23 18:23:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:41,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:41,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:41,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:23:41,535 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash 563399687, now seen corresponding path program 1 times [2020-10-23 18:23:41,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:41,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819381828] [2020-10-23 18:23:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:41,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819381828] [2020-10-23 18:23:41,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:41,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356240274] [2020-10-23 18:23:41,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:41,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:41,600 INFO L87 Difference]: Start difference. First operand 6154 states and 8520 transitions. Second operand 4 states. [2020-10-23 18:23:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:41,862 INFO L93 Difference]: Finished difference Result 14094 states and 19531 transitions. [2020-10-23 18:23:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:41,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:41,879 INFO L225 Difference]: With dead ends: 14094 [2020-10-23 18:23:41,879 INFO L226 Difference]: Without dead ends: 8075 [2020-10-23 18:23:41,894 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 [2020-10-23 18:23:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2020-10-23 18:23:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8074. [2020-10-23 18:23:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-10-23 18:23:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 11016 transitions. [2020-10-23 18:23:42,176 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 11016 transitions. Word has length 30 [2020-10-23 18:23:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:42,176 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 11016 transitions. [2020-10-23 18:23:42,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 11016 transitions. [2020-10-23 18:23:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:42,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:42,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:42,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 18:23:42,187 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1313261814, now seen corresponding path program 1 times [2020-10-23 18:23:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:42,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699802313] [2020-10-23 18:23:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:42,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:42,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699802313] [2020-10-23 18:23:42,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:42,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584380983] [2020-10-23 18:23:42,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:42,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:42,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:42,233 INFO L87 Difference]: Start difference. First operand 8074 states and 11016 transitions. Second operand 4 states. [2020-10-23 18:23:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:42,476 INFO L93 Difference]: Finished difference Result 12110 states and 16459 transitions. [2020-10-23 18:23:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:42,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:42,493 INFO L225 Difference]: With dead ends: 12110 [2020-10-23 18:23:42,493 INFO L226 Difference]: Without dead ends: 8203 [2020-10-23 18:23:42,503 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 [2020-10-23 18:23:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-10-23 18:23:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-10-23 18:23:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-10-23 18:23:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11016 transitions. [2020-10-23 18:23:42,823 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11016 transitions. Word has length 31 [2020-10-23 18:23:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:42,824 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11016 transitions. [2020-10-23 18:23:42,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11016 transitions. [2020-10-23 18:23:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:42,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:42,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:42,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 18:23:42,835 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash 292193460, now seen corresponding path program 1 times [2020-10-23 18:23:42,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:42,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280442376] [2020-10-23 18:23:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:42,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280442376] [2020-10-23 18:23:42,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:42,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:42,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548101911] [2020-10-23 18:23:42,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:42,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:42,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:42,897 INFO L87 Difference]: Start difference. First operand 8202 states and 11016 transitions. Second operand 4 states. [2020-10-23 18:23:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:43,237 INFO L93 Difference]: Finished difference Result 13838 states and 18827 transitions. [2020-10-23 18:23:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:43,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:43,313 INFO L225 Difference]: With dead ends: 13838 [2020-10-23 18:23:43,314 INFO L226 Difference]: Without dead ends: 13835 [2020-10-23 18:23:43,317 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 [2020-10-23 18:23:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-10-23 18:23:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-10-23 18:23:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-10-23 18:23:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16008 transitions. [2020-10-23 18:23:43,622 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16008 transitions. Word has length 31 [2020-10-23 18:23:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:43,622 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16008 transitions. [2020-10-23 18:23:43,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16008 transitions. [2020-10-23 18:23:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:43,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:43,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:43,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 18:23:43,641 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash -987670218, now seen corresponding path program 1 times [2020-10-23 18:23:43,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:43,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381520238] [2020-10-23 18:23:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:43,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:43,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381520238] [2020-10-23 18:23:43,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:43,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771371185] [2020-10-23 18:23:43,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:43,692 INFO L87 Difference]: Start difference. First operand 12298 states and 16008 transitions. Second operand 4 states. [2020-10-23 18:23:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:44,124 INFO L93 Difference]: Finished difference Result 27918 states and 36235 transitions. [2020-10-23 18:23:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:44,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:44,154 INFO L225 Difference]: With dead ends: 27918 [2020-10-23 18:23:44,154 INFO L226 Difference]: Without dead ends: 15883 [2020-10-23 18:23:44,176 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 [2020-10-23 18:23:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-10-23 18:23:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-10-23 18:23:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-23 18:23:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 20232 transitions. [2020-10-23 18:23:44,703 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 20232 transitions. Word has length 31 [2020-10-23 18:23:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:44,703 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 20232 transitions. [2020-10-23 18:23:44,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 20232 transitions. [2020-10-23 18:23:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:23:44,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:44,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:44,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 18:23:44,732 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash 474745586, now seen corresponding path program 1 times [2020-10-23 18:23:44,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:44,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529179662] [2020-10-23 18:23:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:44,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:44,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529179662] [2020-10-23 18:23:44,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:44,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:44,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297025615] [2020-10-23 18:23:44,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:44,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:44,781 INFO L87 Difference]: Start difference. First operand 15882 states and 20232 transitions. Second operand 4 states. [2020-10-23 18:23:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:45,258 INFO L93 Difference]: Finished difference Result 23822 states and 30219 transitions. [2020-10-23 18:23:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:45,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:23:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:45,290 INFO L225 Difference]: With dead ends: 23822 [2020-10-23 18:23:45,290 INFO L226 Difference]: Without dead ends: 16139 [2020-10-23 18:23:45,305 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 [2020-10-23 18:23:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-23 18:23:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-23 18:23:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-23 18:23:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-10-23 18:23:45,858 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-10-23 18:23:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:45,859 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-10-23 18:23:45,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-10-23 18:23:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:23:45,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:45,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:45,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 18:23:45,878 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash -546322768, now seen corresponding path program 1 times [2020-10-23 18:23:45,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:45,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544620286] [2020-10-23 18:23:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:45,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544620286] [2020-10-23 18:23:45,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:45,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579909011] [2020-10-23 18:23:45,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:45,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:45,927 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-10-23 18:23:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:46,626 INFO L93 Difference]: Finished difference Result 46862 states and 57611 transitions. [2020-10-23 18:23:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:46,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:23:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:46,673 INFO L225 Difference]: With dead ends: 46862 [2020-10-23 18:23:46,673 INFO L226 Difference]: Without dead ends: 31243 [2020-10-23 18:23:46,701 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 [2020-10-23 18:23:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-10-23 18:23:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-10-23 18:23:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-23 18:23:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-10-23 18:23:47,650 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-10-23 18:23:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:47,650 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-10-23 18:23:47,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-10-23 18:23:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:23:47,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:47,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:47,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 18:23:47,680 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash 733540910, now seen corresponding path program 1 times [2020-10-23 18:23:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:47,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347853435] [2020-10-23 18:23:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:47,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347853435] [2020-10-23 18:23:47,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:47,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056620805] [2020-10-23 18:23:47,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:47,726 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-10-23 18:23:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:48,421 INFO L93 Difference]: Finished difference Result 33294 states and 40459 transitions. [2020-10-23 18:23:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:48,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-23 18:23:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:48,462 INFO L225 Difference]: With dead ends: 33294 [2020-10-23 18:23:48,462 INFO L226 Difference]: Without dead ends: 33291 [2020-10-23 18:23:48,469 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 [2020-10-23 18:23:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-10-23 18:23:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-10-23 18:23:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-23 18:23:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-10-23 18:23:49,360 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-10-23 18:23:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,361 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-10-23 18:23:49,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-10-23 18:23:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:23:49,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:49,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:49,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 18:23:49,394 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 250556865, now seen corresponding path program 1 times [2020-10-23 18:23:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:49,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836018657] [2020-10-23 18:23:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:49,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836018657] [2020-10-23 18:23:49,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:49,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418234761] [2020-10-23 18:23:49,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:49,457 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-10-23 18:23:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:50,551 INFO L93 Difference]: Finished difference Result 50701 states and 59402 transitions. [2020-10-23 18:23:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:50,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-23 18:23:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:50,604 INFO L225 Difference]: With dead ends: 50701 [2020-10-23 18:23:50,605 INFO L226 Difference]: Without dead ends: 50698 [2020-10-23 18:23:50,614 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 [2020-10-23 18:23:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-10-23 18:23:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-10-23 18:23:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-10-23 18:23:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-10-23 18:23:51,587 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-10-23 18:23:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,587 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-10-23 18:23:51,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-10-23 18:23:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:23:51,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:51,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 18:23:51,623 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1029306813, now seen corresponding path program 1 times [2020-10-23 18:23:51,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030630427] [2020-10-23 18:23:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:23:51,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030630427] [2020-10-23 18:23:51,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:51,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:51,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750178445] [2020-10-23 18:23:51,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:51,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:51,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:51,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:51,664 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-10-23 18:23:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:53,060 INFO L93 Difference]: Finished difference Result 109066 states and 124936 transitions. [2020-10-23 18:23:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:53,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-23 18:23:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:53,061 INFO L225 Difference]: With dead ends: 109066 [2020-10-23 18:23:53,061 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:23:53,163 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 [2020-10-23 18:23:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:23:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:23:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:23:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:23:53,164 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-23 18:23:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:53,164 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:23:53,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:23:53,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:23:53,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 18:23:53,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:27:35,612 WARN L193 SmtUtils]: Spent 3.71 m on a formula simplification. DAG size of input: 8275 DAG size of output: 32 [2020-10-23 18:27:35,660 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:27:35,660 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:27:35,660 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:27:35,660 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:27:35,661 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:27:35,661 INFO L270 CegarLoopResult]: 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|)) [2020-10-23 18:27:35,661 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:27:35,661 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:27:35,661 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:27:35,661 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:27:35,661 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:27:35,661 INFO L274 CegarLoopResult]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 179) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L160(line 160) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L177(line 177) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L274 CegarLoopResult]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,662 INFO L277 CegarLoopResult]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L145(line 145) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 179) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L170(line 170) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L270 CegarLoopResult]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 179) the Hoare annotation is: true [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,663 INFO L274 CegarLoopResult]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L155(line 155) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L73(lines 73 75) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,664 INFO L274 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L165(line 165) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L150(line 150) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L277 CegarLoopResult]: At program point L175(lines 7 179) the Hoare annotation is: true [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,665 INFO L274 CegarLoopResult]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2020-10-23 18:27:35,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:27:35 BoogieIcfgContainer [2020-10-23 18:27:35,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:27:35,677 INFO L168 Benchmark]: Toolchain (without parser) took 242428.10 ms. Allocated memory was 152.0 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 127.0 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2020-10-23 18:27:35,678 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:27:35,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.28 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:35,679 INFO L168 Benchmark]: Boogie Preprocessor took 40.55 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:35,679 INFO L168 Benchmark]: RCFGBuilder took 549.12 ms. Allocated memory is still 152.0 MB. Free memory was 114.3 MB in the beginning and 129.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:27:35,679 INFO L168 Benchmark]: TraceAbstraction took 241548.33 ms. Allocated memory was 152.0 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 129.4 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2020-10-23 18:27:35,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.28 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.55 ms. Allocated memory is still 152.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.12 ms. Allocated memory is still 152.0 MB. Free memory was 114.3 MB in the beginning and 129.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 241548.33 ms. Allocated memory was 152.0 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 129.4 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: 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, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.9s, OverallIterations: 30, TraceHistogramMax: 1, AutomataDifference: 10.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 222.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2829 SDtfs, 4152 SDslu, 233 SDs, 0 SdLazy, 2031 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 30 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 37 PreInvPairs, 2088 NumberOfFragments, 38 HoareAnnotationTreeSize, 37 FomulaSimplifications, 164876390 FormulaSimplificationTreeSizeReduction, 222.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 843 NumberOfCodeBlocks, 843 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 67582 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 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...