/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/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:15:36,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:15:36,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:15:36,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:15:36,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:15:36,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:15:36,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:15:36,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:15:36,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:15:36,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:15:36,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:15:36,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:15:36,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:15:36,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:15:36,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:15:36,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:15:36,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:15:36,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:15:36,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:15:36,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:15:36,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:15:36,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:15:36,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:15:36,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:15:36,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:15:36,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:15:36,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:15:36,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:15:36,171 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 18:15:36,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:15:36,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:15:36,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:15:36,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:15:36,201 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:15:36,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:15:36,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:15:36,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:15:36,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:15:36,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:15:36,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:15:36,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:15:36,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:15:36,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:15:36,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:15:36,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:15:36,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:15:36,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:15:36,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:15:36,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:15:36,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:15:36,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:15:36,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:15:36,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:15:36,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:15:36,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:15:36,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:15:36,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:15:36,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:15:36,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:15:36,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:15:36,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:15:36,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:15:36,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:15:36,676 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:15:36,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-10-23 18:15:36,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd91d7d58/8ce1da3800b74c30b8890c766b505916/FLAG43995c93d [2020-10-23 18:15:37,430 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:15:37,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-10-23 18:15:37,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd91d7d58/8ce1da3800b74c30b8890c766b505916/FLAG43995c93d [2020-10-23 18:15:37,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd91d7d58/8ce1da3800b74c30b8890c766b505916 [2020-10-23 18:15:37,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:15:37,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:15:37,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:37,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:15:37,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:15:37,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:37" (1/1) ... [2020-10-23 18:15:37,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b45425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:37, skipping insertion in model container [2020-10-23 18:15:37,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:37" (1/1) ... [2020-10-23 18:15:37,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:15:37,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:15:38,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:38,034 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:15:38,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:38,077 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:15:38,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38 WrapperNode [2020-10-23 18:15:38,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:38,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:15:38,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:15:38,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:15:38,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (1/1) ... [2020-10-23 18:15:38,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:15:38,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:15:38,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:15:38,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:15:38,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (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 18:15:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:15:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:15:38,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:15:38,228 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:15:38,228 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-23 18:15:38,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:15:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:15:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:15:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:15:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:15:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:15:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:15:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-23 18:15:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:15:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:15:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:15:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:15:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:15:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:15:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:15:38,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:15:38,627 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:15:38,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:38 BoogieIcfgContainer [2020-10-23 18:15:38,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:15:38,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:15:38,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:15:38,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:15:38,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:15:37" (1/3) ... [2020-10-23 18:15:38,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7070c17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:38, skipping insertion in model container [2020-10-23 18:15:38,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:38" (2/3) ... [2020-10-23 18:15:38,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7070c17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:38, skipping insertion in model container [2020-10-23 18:15:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:38" (3/3) ... [2020-10-23 18:15:38,643 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-10-23 18:15:38,663 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:15:38,677 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:15:38,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:15:38,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:15:38,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:15:38,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:15:38,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:15:38,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:15:38,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:15:38,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:15:38,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:15:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-23 18:15:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:15:38,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:38,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:38,802 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-23 18:15:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:38,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41567644] [2020-10-23 18:15:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:39,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:39,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:39,371 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 18:15:39,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41567644] [2020-10-23 18:15:39,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:39,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072587685] [2020-10-23 18:15:39,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:39,411 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-23 18:15:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:39,836 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-23 18:15:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:39,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:15:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:39,851 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:15:39,851 INFO L226 Difference]: Without dead ends: 28 [2020-10-23 18:15:39,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-23 18:15:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-23 18:15:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-23 18:15:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-23 18:15:39,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-23 18:15:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:39,930 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-23 18:15:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-23 18:15:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:15:39,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:39,934 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] [2020-10-23 18:15:39,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:15:39,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-23 18:15:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:39,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093956983] [2020-10-23 18:15:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,150 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 18:15:40,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093956983] [2020-10-23 18:15:40,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:40,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:40,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112275855] [2020-10-23 18:15:40,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:40,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:40,157 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-23 18:15:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:40,476 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-23 18:15:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:40,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-23 18:15:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:40,479 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:15:40,479 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:15:40,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:15:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:15:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:15:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-23 18:15:40,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-23 18:15:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:40,495 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-23 18:15:40,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-23 18:15:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:15:40,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:40,497 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] [2020-10-23 18:15:40,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:15:40,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-23 18:15:40,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:40,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611937629] [2020-10-23 18:15:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,775 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-23 18:15:40,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:40,914 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 18:15:40,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611937629] [2020-10-23 18:15:40,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:40,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:15:40,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447271485] [2020-10-23 18:15:40,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:15:40,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:15:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:40,919 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-10-23 18:15:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:41,341 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-23 18:15:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:15:41,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-23 18:15:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:41,344 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:15:41,344 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:15:41,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:15:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:15:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:15:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:15:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-23 18:15:41,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-23 18:15:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:41,357 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-23 18:15:41,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:15:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-23 18:15:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:15:41,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:41,359 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:41,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:15:41,360 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:41,361 INFO L82 PathProgramCache]: Analyzing trace with hash 20115896, now seen corresponding path program 1 times [2020-10-23 18:15:41,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:41,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323843208] [2020-10-23 18:15:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323843208] [2020-10-23 18:15:41,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:41,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:41,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786287122] [2020-10-23 18:15:41,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:41,567 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-23 18:15:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:41,834 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-23 18:15:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:41,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-23 18:15:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:41,837 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:15:41,837 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:15:41,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:41,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:15:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-23 18:15:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:15:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:15:41,849 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-23 18:15:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:41,849 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:15:41,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:15:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:15:41,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:41,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:41,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:15:41,852 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1776835463, now seen corresponding path program 1 times [2020-10-23 18:15:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:41,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774469724] [2020-10-23 18:15:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:41,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774469724] [2020-10-23 18:15:42,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:42,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:15:42,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657075777] [2020-10-23 18:15:42,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:15:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:15:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:42,145 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-23 18:15:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:42,669 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-23 18:15:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:15:42,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-23 18:15:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:42,671 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:15:42,672 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:15:42,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:15:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:15:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-23 18:15:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:15:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:15:42,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2020-10-23 18:15:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:42,683 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:15:42,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:15:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:15:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:15:42,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:42,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:42,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:15:42,686 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash -889331782, now seen corresponding path program 1 times [2020-10-23 18:15:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:42,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633875166] [2020-10-23 18:15:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:42,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:43,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:43,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633875166] [2020-10-23 18:15:43,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78621258] [2020-10-23 18:15:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:15:43,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:43,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:43,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:15:43,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166374992] [2020-10-23 18:15:43,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:15:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:15:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:15:43,336 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-10-23 18:15:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:44,111 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-23 18:15:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:15:44,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-23 18:15:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:44,114 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:15:44,114 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:15:44,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:15:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:15:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-23 18:15:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:15:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:15:44,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-23 18:15:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:44,125 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:15:44,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:15:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:15:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:15:44,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:44,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:44,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:15:44,342 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash -6218534, now seen corresponding path program 1 times [2020-10-23 18:15:44,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:44,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125388873] [2020-10-23 18:15:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:44,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125388873] [2020-10-23 18:15:44,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:44,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:15:44,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615925915] [2020-10-23 18:15:44,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:15:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:15:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:44,599 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-23 18:15:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:45,101 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-23 18:15:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:15:45,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-23 18:15:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:45,104 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:15:45,104 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:15:45,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:15:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:15:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 18:15:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:15:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-23 18:15:45,115 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-10-23 18:15:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:45,116 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-23 18:15:45,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:15:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-23 18:15:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:15:45,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:45,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:45,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:15:45,118 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1803169893, now seen corresponding path program 1 times [2020-10-23 18:15:45,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:45,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025580897] [2020-10-23 18:15:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:45,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025580897] [2020-10-23 18:15:45,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401441405] [2020-10-23 18:15:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:15:45,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 18:15:45,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:45,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2020-10-23 18:15:45,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933595286] [2020-10-23 18:15:45,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:15:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:15:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:15:45,583 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-10-23 18:15:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:45,603 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-23 18:15:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:15:45,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-23 18:15:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:45,605 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:15:45,605 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:15:45,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:15:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:15:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 18:15:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:15:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-23 18:15:45,615 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-10-23 18:15:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-23 18:15:45,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:15:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-23 18:15:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:15:45,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:45,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:45,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:45,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash -915666212, now seen corresponding path program 1 times [2020-10-23 18:15:45,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:45,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408154528] [2020-10-23 18:15:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:45,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:46,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:46,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:46,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408154528] [2020-10-23 18:15:46,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220202646] [2020-10-23 18:15:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-23 18:15:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:46,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:46,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-10-23 18:15:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551420098] [2020-10-23 18:15:46,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:15:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:15:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:15:46,342 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 16 states. [2020-10-23 18:15:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:47,350 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-23 18:15:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:15:47,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-23 18:15:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:47,352 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:15:47,352 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:15:47,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:15:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:15:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-10-23 18:15:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:15:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 18:15:47,372 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-10-23 18:15:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:47,372 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 18:15:47,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:15:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 18:15:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:15:47,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:47,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:47,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:47,580 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash -30908644, now seen corresponding path program 1 times [2020-10-23 18:15:47,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:47,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160884322] [2020-10-23 18:15:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:15:47,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160884322] [2020-10-23 18:15:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550548347] [2020-10-23 18:15:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 18:15:47,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-23 18:15:48,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:48,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2020-10-23 18:15:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516315664] [2020-10-23 18:15:48,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:15:48,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:15:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:15:48,108 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-23 18:15:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:48,154 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-23 18:15:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:15:48,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-23 18:15:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:48,159 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:15:48,159 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:15:48,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:15:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:15:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 18:15:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:15:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-23 18:15:48,182 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 43 [2020-10-23 18:15:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:48,182 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-23 18:15:48,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:15:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-23 18:15:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:15:48,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:48,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:48,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:48,402 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1827860003, now seen corresponding path program 2 times [2020-10-23 18:15:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:48,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699945463] [2020-10-23 18:15:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:15:48,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699945463] [2020-10-23 18:15:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960545124] [2020-10-23 18:15:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:48,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:15:48,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:48,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:15:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:15:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:49,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:15:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415176729] [2020-10-23 18:15:49,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:15:49,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:15:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:15:49,092 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2020-10-23 18:15:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:50,425 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-23 18:15:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:15:50,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-23 18:15:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:50,427 INFO L225 Difference]: With dead ends: 83 [2020-10-23 18:15:50,427 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:15:50,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:15:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:15:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-23 18:15:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:15:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-23 18:15:50,458 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2020-10-23 18:15:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:50,458 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-23 18:15:50,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:15:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-23 18:15:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 18:15:50,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:50,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:50,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:15:50,661 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:50,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2448331, now seen corresponding path program 2 times [2020-10-23 18:15:50,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:50,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177137540] [2020-10-23 18:15:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 18:15:51,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177137540] [2020-10-23 18:15:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307965833] [2020-10-23 18:15:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:51,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-23 18:15:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:51,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:15:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-23 18:15:51,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:51,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [21] total 24 [2020-10-23 18:15:51,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42827489] [2020-10-23 18:15:51,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:15:51,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:15:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:15:51,444 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-10-23 18:15:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:51,456 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-23 18:15:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:15:51,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-23 18:15:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:51,458 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:15:51,458 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:15:51,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:15:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:15:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:15:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:15:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:15:51,460 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-10-23 18:15:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:51,460 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:15:51,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:15:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:15:51,461 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:15:51,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:51,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:15:51,781 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:15:51,782 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:15:51,782 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:15:51,782 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:15:51,782 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:51,783 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 18:15:51,783 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-10-23 18:15:51,783 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-10-23 18:15:51,783 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:15:51,784 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-10-23 18:15:51,784 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-10-23 18:15:51,784 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-10-23 18:15:51,785 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-23 18:15:51,785 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-10-23 18:15:51,785 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-10-23 18:15:51,785 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-23 18:15:51,785 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-23 18:15:51,785 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-10-23 18:15:51,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:15:51 BoogieIcfgContainer [2020-10-23 18:15:51,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:15:51,793 INFO L168 Benchmark]: Toolchain (without parser) took 13991.10 ms. Allocated memory was 158.3 MB in the beginning and 278.9 MB in the end (delta: 120.6 MB). Free memory was 134.5 MB in the beginning and 260.4 MB in the end (delta: -125.9 MB). Peak memory consumption was 155.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:51,793 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:15:51,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.51 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 124.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:51,795 INFO L168 Benchmark]: Boogie Preprocessor took 43.44 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:51,795 INFO L168 Benchmark]: RCFGBuilder took 506.03 ms. Allocated memory is still 158.3 MB. Free memory was 122.5 MB in the beginning and 109.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:51,796 INFO L168 Benchmark]: TraceAbstraction took 13157.90 ms. Allocated memory was 158.3 MB in the beginning and 278.9 MB in the end (delta: 120.6 MB). Free memory was 108.7 MB in the beginning and 260.4 MB in the end (delta: -151.8 MB). Peak memory consumption was 129.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:51,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 158.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.51 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 124.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.44 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.03 ms. Allocated memory is still 158.3 MB. Free memory was 122.5 MB in the beginning and 109.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13157.90 ms. Allocated memory was 158.3 MB in the beginning and 278.9 MB in the end (delta: 120.6 MB). Free memory was 108.7 MB in the beginning and 260.4 MB in the end (delta: -151.8 MB). Peak memory consumption was 129.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 220 SDslu, 890 SDs, 0 SdLazy, 2016 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 534 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 24 NumberOfFragments, 41 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 627 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 75593 SizeOfPredicates, 17 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 163/231 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...