/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:04:46,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:04:46,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:04:46,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:04:46,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:04:46,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:04:46,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:04:46,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:04:46,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:04:46,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:04:46,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:04:46,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:04:46,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:04:46,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:04:46,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:04:47,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:04:47,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:04:47,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:04:47,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:04:47,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:04:47,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:04:47,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:04:47,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:04:47,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:04:47,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:04:47,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:04:47,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:04:47,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:04:47,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:04:47,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:04:47,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:04:47,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:04:47,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:04:47,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:04:47,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:04:47,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:04:47,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:04:47,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:04:47,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:04:47,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:04:47,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:04:47,070 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:04:47,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:04:47,071 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:04:47,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:04:47,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:04:47,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:04:47,072 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:04:47,072 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:04:47,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:04:47,072 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:04:47,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:04:47,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:04:47,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:04:47,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:04:47,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:04:47,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:04:47,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:04:47,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:04:47,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:04:47,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:04:47,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:04:47,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:04:47,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:04:47,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:04:47,610 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:04:47,611 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:04:47,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2020-12-22 19:04:47,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f9d0d2/0c8c628490a1429fa477cfc14df82143/FLAG4331e0d9b [2020-12-22 19:04:48,346 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:04:48,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2020-12-22 19:04:48,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f9d0d2/0c8c628490a1429fa477cfc14df82143/FLAG4331e0d9b [2020-12-22 19:04:48,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f9d0d2/0c8c628490a1429fa477cfc14df82143 [2020-12-22 19:04:48,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:04:48,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:04:48,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:04:48,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:04:48,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:04:48,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:48,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e3d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48, skipping insertion in model container [2020-12-22 19:04:48,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:48,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:04:48,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:04:48,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:04:48,910 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:04:48,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:04:48,948 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:04:48,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48 WrapperNode [2020-12-22 19:04:48,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:04:48,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:04:48,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:04:48,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:04:48,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:48,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:48,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:04:48,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:04:48,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:04:48,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:04:49,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... [2020-12-22 19:04:49,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:04:49,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:04:49,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:04:49,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:04:49,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:04:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:04:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:04:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:04:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:04:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:04:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:04:49,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:04:49,722 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 19:04:49,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:49 BoogieIcfgContainer [2020-12-22 19:04:49,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:04:49,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:04:49,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:04:49,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:04:49,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:48" (1/3) ... [2020-12-22 19:04:49,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3c5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:49, skipping insertion in model container [2020-12-22 19:04:49,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:48" (2/3) ... [2020-12-22 19:04:49,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d3c5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:49, skipping insertion in model container [2020-12-22 19:04:49,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:49" (3/3) ... [2020-12-22 19:04:49,735 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2020-12-22 19:04:49,743 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:04:49,750 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-12-22 19:04:49,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-12-22 19:04:49,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:04:49,831 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:04:49,831 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:04:49,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:04:49,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:04:49,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:04:49,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:04:49,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:04:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-22 19:04:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:04:49,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:49,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:04:49,879 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-22 19:04:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:49,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104847865] [2020-12-22 19:04:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:50,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104847865] [2020-12-22 19:04:50,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:50,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:04:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656923389] [2020-12-22 19:04:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:50,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:50,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:50,131 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-12-22 19:04:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:50,216 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 19:04:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:50,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:04:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:50,230 INFO L225 Difference]: With dead ends: 30 [2020-12-22 19:04:50,230 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 19:04:50,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 19:04:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 19:04:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:04:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 19:04:50,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2020-12-22 19:04:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:50,272 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 19:04:50,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 19:04:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:04:50,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:50,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:04:50,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:04:50,274 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-22 19:04:50,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495086709] [2020-12-22 19:04:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495086709] [2020-12-22 19:04:50,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:50,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:04:50,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120926103] [2020-12-22 19:04:50,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:50,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:50,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:50,349 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-12-22 19:04:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:50,416 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 19:04:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:50,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:04:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:50,418 INFO L225 Difference]: With dead ends: 32 [2020-12-22 19:04:50,419 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 19:04:50,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:04:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 19:04:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-22 19:04:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 19:04:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 19:04:50,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2020-12-22 19:04:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:50,426 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 19:04:50,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 19:04:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:04:50,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:50,428 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:50,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:04:50,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-22 19:04:50,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:50,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917663500] [2020-12-22 19:04:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917663500] [2020-12-22 19:04:50,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807496718] [2020-12-22 19:04:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:04:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:50,864 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:04:50,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:50,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:50,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:50,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:04:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:50,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:50,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-22 19:04:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531594904] [2020-12-22 19:04:50,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:04:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:50,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:04:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:04:50,968 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-12-22 19:04:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:51,144 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 19:04:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:04:51,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 19:04:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:51,151 INFO L225 Difference]: With dead ends: 35 [2020-12-22 19:04:51,151 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 19:04:51,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:04:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 19:04:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 19:04:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 19:04:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-22 19:04:51,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 8 [2020-12-22 19:04:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:51,166 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-22 19:04:51,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:04:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-22 19:04:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:04:51,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:51,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:04:51,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 19:04:51,370 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1401693698, now seen corresponding path program 1 times [2020-12-22 19:04:51,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:51,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179166464] [2020-12-22 19:04:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 19:04:51,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179166464] [2020-12-22 19:04:51,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:04:51,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:04:51,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004557486] [2020-12-22 19:04:51,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:04:51,504 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 4 states. [2020-12-22 19:04:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:51,586 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 19:04:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:51,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 19:04:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:51,589 INFO L225 Difference]: With dead ends: 32 [2020-12-22 19:04:51,590 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 19:04:51,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:04:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 19:04:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 19:04:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 19:04:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 19:04:51,605 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-12-22 19:04:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:51,605 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 19:04:51,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 19:04:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:04:51,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:51,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:04:51,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:04:51,608 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1401693699, now seen corresponding path program 1 times [2020-12-22 19:04:51,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:51,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339677662] [2020-12-22 19:04:51,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339677662] [2020-12-22 19:04:51,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346245152] [2020-12-22 19:04:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 19:04:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:51,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:51,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 19:04:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130073054] [2020-12-22 19:04:51,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:04:51,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:04:51,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:04:51,835 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-12-22 19:04:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:51,881 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 19:04:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:04:51,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:04:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:51,883 INFO L225 Difference]: With dead ends: 39 [2020-12-22 19:04:51,883 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 19:04:51,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:04:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 19:04:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-22 19:04:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 19:04:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 19:04:51,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 17 [2020-12-22 19:04:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:51,888 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 19:04:51,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:04:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 19:04:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:04:51,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:51,889 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:04:52,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:52,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 2 times [2020-12-22 19:04:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803210751] [2020-12-22 19:04:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:52,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803210751] [2020-12-22 19:04:52,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010934087] [2020-12-22 19:04:52,188 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:52,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:52,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:52,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:04:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:52,251 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:04:52,252 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:52,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:52,259 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:52,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:04:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 19:04:52,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:52,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 19:04:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584623540] [2020-12-22 19:04:52,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:52,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:52,354 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-12-22 19:04:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:52,436 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-22 19:04:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:52,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-22 19:04:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:52,438 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:04:52,438 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 19:04:52,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:04:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 19:04:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-22 19:04:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:04:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 19:04:52,444 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2020-12-22 19:04:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:52,444 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 19:04:52,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 19:04:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 19:04:52,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:52,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:52,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:52,660 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766362, now seen corresponding path program 1 times [2020-12-22 19:04:52,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:52,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156050591] [2020-12-22 19:04:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:52,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156050591] [2020-12-22 19:04:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819899539] [2020-12-22 19:04:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 19:04:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:52,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:52,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 19:04:52,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852691352] [2020-12-22 19:04:52,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:04:52,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:52,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:04:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:04:52,951 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-22 19:04:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:52,999 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-22 19:04:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:04:53,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-22 19:04:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:53,004 INFO L225 Difference]: With dead ends: 50 [2020-12-22 19:04:53,004 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 19:04:53,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:04:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 19:04:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-22 19:04:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:04:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-22 19:04:53,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 24 [2020-12-22 19:04:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:53,020 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-22 19:04:53,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:04:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-22 19:04:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 19:04:53,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:53,022 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:53,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:53,238 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash -213191075, now seen corresponding path program 2 times [2020-12-22 19:04:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:53,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27389047] [2020-12-22 19:04:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27389047] [2020-12-22 19:04:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415772530] [2020-12-22 19:04:53,321 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 [2020-12-22 19:04:53,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:04:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:53,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:53,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 19:04:53,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517512520] [2020-12-22 19:04:53,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:04:53,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:53,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:04:53,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:53,472 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 9 states. [2020-12-22 19:04:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:53,532 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-22 19:04:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:04:53,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 19:04:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:53,535 INFO L225 Difference]: With dead ends: 54 [2020-12-22 19:04:53,535 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:04:53,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:04:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:04:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-22 19:04:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:04:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 19:04:53,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2020-12-22 19:04:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:53,551 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 19:04:53,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:04:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 19:04:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 19:04:53,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:53,557 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:53,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:53,759 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1934674464, now seen corresponding path program 3 times [2020-12-22 19:04:53,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:53,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851404547] [2020-12-22 19:04:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:04:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851404547] [2020-12-22 19:04:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185893682] [2020-12-22 19:04:53,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-22 19:04:53,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:04:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:04:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 19:04:54,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:54,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-12-22 19:04:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745086087] [2020-12-22 19:04:54,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:04:54,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:04:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:04:54,111 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-12-22 19:04:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:54,851 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-12-22 19:04:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:04:54,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-12-22 19:04:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:54,853 INFO L225 Difference]: With dead ends: 123 [2020-12-22 19:04:54,853 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 19:04:54,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:04:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 19:04:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 62. [2020-12-22 19:04:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:04:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-22 19:04:54,859 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 32 [2020-12-22 19:04:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:54,860 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-22 19:04:54,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:04:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-22 19:04:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 19:04:54,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:54,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:55,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:55,076 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1393686122, now seen corresponding path program 1 times [2020-12-22 19:04:55,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:55,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421054832] [2020-12-22 19:04:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:55,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421054832] [2020-12-22 19:04:55,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596219968] [2020-12-22 19:04:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:55,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:04:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:55,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:55,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 19:04:55,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422146778] [2020-12-22 19:04:55,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 19:04:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 19:04:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:04:55,396 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-22 19:04:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:55,457 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-12-22 19:04:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:04:55,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-22 19:04:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:55,459 INFO L225 Difference]: With dead ends: 69 [2020-12-22 19:04:55,459 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 19:04:55,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:04:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 19:04:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-22 19:04:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 19:04:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-12-22 19:04:55,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 36 [2020-12-22 19:04:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:55,464 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-12-22 19:04:55,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 19:04:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-12-22 19:04:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 19:04:55,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:55,466 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:55,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:04:55,676 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash -20184339, now seen corresponding path program 2 times [2020-12-22 19:04:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492542111] [2020-12-22 19:04:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:55,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492542111] [2020-12-22 19:04:55,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277679649] [2020-12-22 19:04:55,841 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:55,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:55,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 19:04:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 19:04:55,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:55,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2020-12-22 19:04:55,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639594357] [2020-12-22 19:04:55,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:04:55,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:04:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:55,947 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 3 states. [2020-12-22 19:04:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:55,959 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-12-22 19:04:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:04:55,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 19:04:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:55,960 INFO L225 Difference]: With dead ends: 65 [2020-12-22 19:04:55,960 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:04:55,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:04:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-22 19:04:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 19:04:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-12-22 19:04:55,968 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 40 [2020-12-22 19:04:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:55,969 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-12-22 19:04:55,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:04:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-12-22 19:04:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 19:04:55,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:55,971 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:56,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 19:04:56,172 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2077689424, now seen corresponding path program 1 times [2020-12-22 19:04:56,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:56,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50632036] [2020-12-22 19:04:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:56,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50632036] [2020-12-22 19:04:56,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689341321] [2020-12-22 19:04:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:04:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:56,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:56,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 19:04:56,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629723019] [2020-12-22 19:04:56,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:04:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:04:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:56,469 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 12 states. [2020-12-22 19:04:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:56,523 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-22 19:04:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:04:56,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-22 19:04:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:56,525 INFO L225 Difference]: With dead ends: 72 [2020-12-22 19:04:56,525 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 19:04:56,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:04:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 19:04:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-22 19:04:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 19:04:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-12-22 19:04:56,529 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 42 [2020-12-22 19:04:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:56,529 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-12-22 19:04:56,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:04:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-12-22 19:04:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 19:04:56,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:56,531 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:56,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:56,747 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash -794270573, now seen corresponding path program 2 times [2020-12-22 19:04:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526397684] [2020-12-22 19:04:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:04:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526397684] [2020-12-22 19:04:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224189087] [2020-12-22 19:04:56,875 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:56,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:04:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:04:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 19:04:57,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:04:57,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2020-12-22 19:04:57,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383573028] [2020-12-22 19:04:57,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:04:57,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:04:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:04:57,101 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 4 states. [2020-12-22 19:04:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:57,132 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-22 19:04:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:04:57,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 19:04:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:57,134 INFO L225 Difference]: With dead ends: 68 [2020-12-22 19:04:57,134 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 19:04:57,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:04:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 19:04:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 19:04:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:04:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-22 19:04:57,138 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 46 [2020-12-22 19:04:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:57,140 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-22 19:04:57,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:04:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-22 19:04:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:04:57,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:57,144 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:04:57,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:57,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1189041073, now seen corresponding path program 4 times [2020-12-22 19:04:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:57,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761329255] [2020-12-22 19:04:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:04:57,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761329255] [2020-12-22 19:04:57,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967310440] [2020-12-22 19:04:57,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:57,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:04:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:57,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:04:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:04:57,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:57,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 19:04:57,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464867400] [2020-12-22 19:04:57,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:04:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:04:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:04:57,649 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 13 states. [2020-12-22 19:04:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:57,734 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-12-22 19:04:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:04:57,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-22 19:04:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:57,736 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:04:57,736 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 19:04:57,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:04:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 19:04:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-22 19:04:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 19:04:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-22 19:04:57,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-12-22 19:04:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:57,744 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-22 19:04:57,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:04:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-22 19:04:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:04:57,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:57,745 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:04:57,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:04:57,954 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash 646801230, now seen corresponding path program 5 times [2020-12-22 19:04:57,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:57,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884124993] [2020-12-22 19:04:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:04:58,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884124993] [2020-12-22 19:04:58,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876890219] [2020-12-22 19:04:58,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:58,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 19:04:58,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:04:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:04:58,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:58,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 19:04:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280685963] [2020-12-22 19:04:58,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 19:04:58,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:58,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 19:04:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:04:58,330 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 14 states. [2020-12-22 19:04:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:58,404 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-22 19:04:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:04:58,404 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-12-22 19:04:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:58,405 INFO L225 Difference]: With dead ends: 75 [2020-12-22 19:04:58,405 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:04:58,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:04:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:04:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-22 19:04:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 19:04:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-22 19:04:58,409 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 51 [2020-12-22 19:04:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:58,409 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-22 19:04:58,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 19:04:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-22 19:04:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 19:04:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:58,410 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:04:58,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:04:58,625 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1818336149, now seen corresponding path program 6 times [2020-12-22 19:04:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:58,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722802476] [2020-12-22 19:04:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 19:04:58,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722802476] [2020-12-22 19:04:58,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708927931] [2020-12-22 19:04:58,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:58,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:04:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:04:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:58,875 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:04:58,876 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:58,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:58,881 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:58,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:04:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 19:04:59,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:59,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 19 [2020-12-22 19:04:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232748330] [2020-12-22 19:04:59,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:04:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:04:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:04:59,092 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-22 19:04:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:59,694 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-12-22 19:04:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:04:59,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-12-22 19:04:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:59,696 INFO L225 Difference]: With dead ends: 88 [2020-12-22 19:04:59,696 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 19:04:59,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:04:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 19:04:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-12-22 19:04:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 19:04:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-12-22 19:04:59,700 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 55 [2020-12-22 19:04:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:59,700 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-12-22 19:04:59,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:04:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-12-22 19:04:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 19:04:59,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:59,701 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:04:59,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:04:59,916 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:04:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1676555342, now seen corresponding path program 7 times [2020-12-22 19:04:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:59,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639617997] [2020-12-22 19:04:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:05:00,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639617997] [2020-12-22 19:05:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708819695] [2020-12-22 19:05:00,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:05:00,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:00,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 19:05:00,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701901735] [2020-12-22 19:05:00,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:05:00,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:00,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:05:00,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:00,293 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-12-22 19:05:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:00,371 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-12-22 19:05:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:00,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-12-22 19:05:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:00,373 INFO L225 Difference]: With dead ends: 90 [2020-12-22 19:05:00,373 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 19:05:00,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:00,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 19:05:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-22 19:05:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:05:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-12-22 19:05:00,377 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 62 [2020-12-22 19:05:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:00,377 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-12-22 19:05:00,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:05:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-12-22 19:05:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 19:05:00,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:00,378 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:05:00,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:00,593 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:00,594 INFO L82 PathProgramCache]: Analyzing trace with hash -728733067, now seen corresponding path program 8 times [2020-12-22 19:05:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:00,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426738047] [2020-12-22 19:05:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:05:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426738047] [2020-12-22 19:05:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854659188] [2020-12-22 19:05:00,852 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:00,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:00,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:05:01,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:01,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 19:05:01,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016013344] [2020-12-22 19:05:01,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:01,029 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 17 states. [2020-12-22 19:05:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:01,107 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-22 19:05:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:05:01,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 19:05:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:01,108 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:05:01,108 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:05:01,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:05:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-22 19:05:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 19:05:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-12-22 19:05:01,112 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 66 [2020-12-22 19:05:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:01,112 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-12-22 19:05:01,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-12-22 19:05:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 19:05:01,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:01,113 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 19:05:01,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:05:01,327 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1531703224, now seen corresponding path program 9 times [2020-12-22 19:05:01,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:01,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039774192] [2020-12-22 19:05:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:05:01,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039774192] [2020-12-22 19:05:01,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117410216] [2020-12-22 19:05:01,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:01,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:05:01,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 19:05:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:01,665 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:05:01,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:01,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:01,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:01,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-22 19:05:01,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:01,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 24 [2020-12-22 19:05:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741545230] [2020-12-22 19:05:01,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:05:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:05:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:01,924 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 24 states. [2020-12-22 19:05:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:02,888 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-12-22 19:05:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:05:02,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-12-22 19:05:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:02,890 INFO L225 Difference]: With dead ends: 107 [2020-12-22 19:05:02,890 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 19:05:02,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:05:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 19:05:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2020-12-22 19:05:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 19:05:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-12-22 19:05:02,897 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 70 [2020-12-22 19:05:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:02,897 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-12-22 19:05:02,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:05:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-12-22 19:05:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:05:02,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:02,898 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:03,112 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash -152010145, now seen corresponding path program 10 times [2020-12-22 19:05:03,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508864754] [2020-12-22 19:05:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:03,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508864754] [2020-12-22 19:05:03,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798087560] [2020-12-22 19:05:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:03,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:03,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:03,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:03,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 19:05:03,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886639633] [2020-12-22 19:05:03,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:03,642 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 19 states. [2020-12-22 19:05:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:03,733 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-12-22 19:05:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:05:03,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-12-22 19:05:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:03,741 INFO L225 Difference]: With dead ends: 109 [2020-12-22 19:05:03,741 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 19:05:03,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 19:05:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-12-22 19:05:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 19:05:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-12-22 19:05:03,744 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 77 [2020-12-22 19:05:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:03,745 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-12-22 19:05:03,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-12-22 19:05:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 19:05:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:03,746 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:05:03,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:03,960 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash -876731076, now seen corresponding path program 11 times [2020-12-22 19:05:03,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:03,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673585756] [2020-12-22 19:05:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:04,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673585756] [2020-12-22 19:05:04,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656449091] [2020-12-22 19:05:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:04,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 19:05:04,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:05:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:04,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:04,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 19:05:04,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961503399] [2020-12-22 19:05:04,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:05:04,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:05:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:04,535 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 20 states. [2020-12-22 19:05:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:04,629 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-12-22 19:05:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:05:04,630 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-12-22 19:05:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:04,632 INFO L225 Difference]: With dead ends: 113 [2020-12-22 19:05:04,632 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 19:05:04,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 19:05:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-12-22 19:05:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 19:05:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-12-22 19:05:04,635 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 81 [2020-12-22 19:05:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:04,636 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-12-22 19:05:04,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:05:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-12-22 19:05:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:05:04,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:04,637 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-22 19:05:04,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 19:05:04,838 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1762988441, now seen corresponding path program 12 times [2020-12-22 19:05:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:04,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28285101] [2020-12-22 19:05:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:05,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28285101] [2020-12-22 19:05:05,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872327046] [2020-12-22 19:05:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:05,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:05:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:05,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:05:05,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:05,326 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:05,326 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:05,327 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-12-22 19:05:05,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:05,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2020-12-22 19:05:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610535183] [2020-12-22 19:05:05,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:05:05,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:05:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:05,638 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 28 states. [2020-12-22 19:05:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:06,788 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2020-12-22 19:05:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:05:06,789 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-12-22 19:05:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:06,790 INFO L225 Difference]: With dead ends: 126 [2020-12-22 19:05:06,790 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 19:05:06,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:05:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 19:05:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-22 19:05:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 19:05:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2020-12-22 19:05:06,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 85 [2020-12-22 19:05:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:06,795 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2020-12-22 19:05:06,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:05:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2020-12-22 19:05:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 19:05:06,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:06,796 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:07,011 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1293987708, now seen corresponding path program 13 times [2020-12-22 19:05:07,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501748091] [2020-12-22 19:05:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:07,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501748091] [2020-12-22 19:05:07,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365890552] [2020-12-22 19:05:07,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:07,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:07,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 19:05:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145209048] [2020-12-22 19:05:07,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:05:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:05:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:05:07,594 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 22 states. [2020-12-22 19:05:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:07,710 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-12-22 19:05:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:07,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 92 [2020-12-22 19:05:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:07,713 INFO L225 Difference]: With dead ends: 128 [2020-12-22 19:05:07,713 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 19:05:07,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:05:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 19:05:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-22 19:05:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 19:05:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2020-12-22 19:05:07,717 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 92 [2020-12-22 19:05:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:07,717 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2020-12-22 19:05:07,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:05:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2020-12-22 19:05:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 19:05:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:07,718 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:05:07,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:05:07,932 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash 331741191, now seen corresponding path program 14 times [2020-12-22 19:05:07,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:07,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085687126] [2020-12-22 19:05:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085687126] [2020-12-22 19:05:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691234330] [2020-12-22 19:05:08,247 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:08,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:08,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:05:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:08,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:08,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 19:05:08,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126652878] [2020-12-22 19:05:08,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:05:08,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:05:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:08,497 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 23 states. [2020-12-22 19:05:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:08,617 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-12-22 19:05:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:05:08,622 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 96 [2020-12-22 19:05:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:08,623 INFO L225 Difference]: With dead ends: 132 [2020-12-22 19:05:08,623 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 19:05:08,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 19:05:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-12-22 19:05:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 19:05:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-12-22 19:05:08,627 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 96 [2020-12-22 19:05:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:08,627 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-12-22 19:05:08,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:05:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-12-22 19:05:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 19:05:08,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,628 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1] [2020-12-22 19:05:08,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:05:08,842 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -902355446, now seen corresponding path program 15 times [2020-12-22 19:05:08,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279792048] [2020-12-22 19:05:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279792048] [2020-12-22 19:05:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226980150] [2020-12-22 19:05:09,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:09,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:05:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:09,353 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:05:09,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:09,361 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:09,362 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-12-22 19:05:09,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:09,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 32 [2020-12-22 19:05:09,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90807653] [2020-12-22 19:05:09,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:05:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:05:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:09,773 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 32 states. [2020-12-22 19:05:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,104 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2020-12-22 19:05:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:05:11,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2020-12-22 19:05:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,106 INFO L225 Difference]: With dead ends: 145 [2020-12-22 19:05:11,106 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 19:05:11,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=864, Invalid=2796, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 19:05:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 19:05:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-12-22 19:05:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-22 19:05:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2020-12-22 19:05:11,111 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 100 [2020-12-22 19:05:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,112 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2020-12-22 19:05:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:05:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2020-12-22 19:05:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 19:05:11,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,113 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,314 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash 232116749, now seen corresponding path program 16 times [2020-12-22 19:05:11,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512621283] [2020-12-22 19:05:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 19:05:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512621283] [2020-12-22 19:05:11,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767054826] [2020-12-22 19:05:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:12,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 19:05:12,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:12,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 19:05:12,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523487751] [2020-12-22 19:05:12,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:12,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:12,336 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand 25 states. [2020-12-22 19:05:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,470 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-12-22 19:05:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:05:12,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-12-22 19:05:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,472 INFO L225 Difference]: With dead ends: 147 [2020-12-22 19:05:12,472 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 19:05:12,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 19:05:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-12-22 19:05:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 19:05:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-12-22 19:05:12,476 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 107 [2020-12-22 19:05:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,477 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-12-22 19:05:12,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-12-22 19:05:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 19:05:12,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,478 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:05:12,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:05:12,693 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1718561750, now seen corresponding path program 17 times [2020-12-22 19:05:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:12,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36847837] [2020-12-22 19:05:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 19:05:13,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36847837] [2020-12-22 19:05:13,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456337576] [2020-12-22 19:05:13,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-22 19:05:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 19:05:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:13,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 19:05:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913132917] [2020-12-22 19:05:13,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:05:13,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:05:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:13,727 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 26 states. [2020-12-22 19:05:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,848 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2020-12-22 19:05:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:05:13,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-12-22 19:05:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,850 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:05:13,850 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 19:05:13,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 19:05:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-12-22 19:05:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 19:05:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2020-12-22 19:05:13,858 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 111 [2020-12-22 19:05:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,858 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2020-12-22 19:05:13,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:05:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2020-12-22 19:05:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 19:05:13,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,860 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,075 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -309100601, now seen corresponding path program 18 times [2020-12-22 19:05:14,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138330985] [2020-12-22 19:05:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 19:05:14,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138330985] [2020-12-22 19:05:14,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930051594] [2020-12-22 19:05:14,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 19:05:14,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:05:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 89 proven. 51 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2020-12-22 19:05:15,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:15,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15] total 40 [2020-12-22 19:05:15,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577555090] [2020-12-22 19:05:15,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 19:05:15,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 19:05:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:15,385 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand 40 states. [2020-12-22 19:05:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,919 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-12-22 19:05:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 19:05:17,920 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2020-12-22 19:05:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,921 INFO L225 Difference]: With dead ends: 163 [2020-12-22 19:05:17,921 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 19:05:17,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1276, Invalid=3980, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 19:05:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 19:05:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-22 19:05:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 19:05:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-12-22 19:05:17,927 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 115 [2020-12-22 19:05:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,927 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-12-22 19:05:17,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 19:05:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-12-22 19:05:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 19:05:17,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,929 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:05:18,136 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2073592985, now seen corresponding path program 19 times [2020-12-22 19:05:18,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485471627] [2020-12-22 19:05:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485471627] [2020-12-22 19:05:18,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006024630] [2020-12-22 19:05:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:18,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 19:05:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510091904] [2020-12-22 19:05:18,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:05:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:05:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:05:18,884 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 29 states. [2020-12-22 19:05:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,023 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-12-22 19:05:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:05:19,024 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 126 [2020-12-22 19:05:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,025 INFO L225 Difference]: With dead ends: 170 [2020-12-22 19:05:19,025 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 19:05:19,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:05:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 19:05:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-12-22 19:05:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 19:05:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2020-12-22 19:05:19,030 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 126 [2020-12-22 19:05:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,031 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2020-12-22 19:05:19,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:05:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2020-12-22 19:05:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 19:05:19,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,032 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:05:19,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:05:19,244 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 687835996, now seen corresponding path program 20 times [2020-12-22 19:05:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815771312] [2020-12-22 19:05:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815771312] [2020-12-22 19:05:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159497091] [2020-12-22 19:05:19,785 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:19,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:20,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:20,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 19:05:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559450791] [2020-12-22 19:05:20,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 19:05:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 19:05:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:20,077 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 30 states. [2020-12-22 19:05:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:20,216 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2020-12-22 19:05:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 19:05:20,220 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-12-22 19:05:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:20,222 INFO L225 Difference]: With dead ends: 174 [2020-12-22 19:05:20,222 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 19:05:20,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 19:05:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-12-22 19:05:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 19:05:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 180 transitions. [2020-12-22 19:05:20,227 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 180 transitions. Word has length 130 [2020-12-22 19:05:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:20,227 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 180 transitions. [2020-12-22 19:05:20,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 19:05:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 180 transitions. [2020-12-22 19:05:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 19:05:20,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:20,229 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 7, 1, 1, 1, 1, 1] [2020-12-22 19:05:20,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:20,444 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash 707754143, now seen corresponding path program 21 times [2020-12-22 19:05:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134839748] [2020-12-22 19:05:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134839748] [2020-12-22 19:05:21,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389479577] [2020-12-22 19:05:21,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:21,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 19:05:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:05:21,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:21,162 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:05:21,162 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:21,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:21,167 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:21,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2020-12-22 19:05:21,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:21,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14] total 43 [2020-12-22 19:05:21,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228723807] [2020-12-22 19:05:21,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:05:21,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:05:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:05:21,799 INFO L87 Difference]: Start difference. First operand 171 states and 180 transitions. Second operand 43 states. [2020-12-22 19:05:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:24,095 INFO L93 Difference]: Finished difference Result 188 states and 198 transitions. [2020-12-22 19:05:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 19:05:24,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2020-12-22 19:05:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:24,097 INFO L225 Difference]: With dead ends: 188 [2020-12-22 19:05:24,097 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 19:05:24,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1538, Invalid=4942, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 19:05:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 19:05:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 19:05:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 19:05:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 196 transitions. [2020-12-22 19:05:24,104 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 196 transitions. Word has length 134 [2020-12-22 19:05:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:24,104 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 196 transitions. [2020-12-22 19:05:24,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:05:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 196 transitions. [2020-12-22 19:05:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 19:05:24,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:24,106 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:05:24,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:24,321 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 565694197, now seen corresponding path program 22 times [2020-12-22 19:05:24,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:24,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862349884] [2020-12-22 19:05:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862349884] [2020-12-22 19:05:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013897439] [2020-12-22 19:05:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:26,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:26,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 19:05:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1745 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:26,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:26,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 19:05:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768184036] [2020-12-22 19:05:26,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:05:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:05:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:26,344 INFO L87 Difference]: Start difference. First operand 186 states and 196 transitions. Second operand 33 states. [2020-12-22 19:05:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:26,529 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-12-22 19:05:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 19:05:26,530 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2020-12-22 19:05:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:26,532 INFO L225 Difference]: With dead ends: 193 [2020-12-22 19:05:26,533 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 19:05:26,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 19:05:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-12-22 19:05:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 19:05:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 200 transitions. [2020-12-22 19:05:26,538 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 200 transitions. Word has length 145 [2020-12-22 19:05:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:26,539 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 200 transitions. [2020-12-22 19:05:26,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:05:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 200 transitions. [2020-12-22 19:05:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 19:05:26,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:26,540 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:05:26,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 19:05:26,754 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -801287342, now seen corresponding path program 23 times [2020-12-22 19:05:26,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:26,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267062458] [2020-12-22 19:05:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267062458] [2020-12-22 19:05:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102985390] [2020-12-22 19:05:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:28,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 19:05:28,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:05:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:29,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:29,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 19:05:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98887339] [2020-12-22 19:05:29,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:05:29,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:05:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:29,057 INFO L87 Difference]: Start difference. First operand 190 states and 200 transitions. Second operand 34 states. [2020-12-22 19:05:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:29,255 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-12-22 19:05:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 19:05:29,261 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-22 19:05:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:29,262 INFO L225 Difference]: With dead ends: 197 [2020-12-22 19:05:29,262 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 19:05:29,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 19:05:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-22 19:05:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-22 19:05:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 204 transitions. [2020-12-22 19:05:29,270 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 204 transitions. Word has length 149 [2020-12-22 19:05:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:29,270 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 204 transitions. [2020-12-22 19:05:29,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:05:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 204 transitions. [2020-12-22 19:05:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 19:05:29,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:29,271 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 8, 8, 8, 1, 1, 1, 1, 1] [2020-12-22 19:05:29,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:29,485 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash -41983697, now seen corresponding path program 24 times [2020-12-22 19:05:29,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:29,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636615318] [2020-12-22 19:05:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636615318] [2020-12-22 19:05:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968091207] [2020-12-22 19:05:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 19:05:30,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:05:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 121 proven. 92 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2020-12-22 19:05:31,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:31,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17] total 50 [2020-12-22 19:05:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708347544] [2020-12-22 19:05:31,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 19:05:31,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 19:05:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1822, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:05:31,652 INFO L87 Difference]: Start difference. First operand 194 states and 204 transitions. Second operand 50 states. [2020-12-22 19:05:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:35,600 INFO L93 Difference]: Finished difference Result 209 states and 220 transitions. [2020-12-22 19:05:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 19:05:35,602 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 153 [2020-12-22 19:05:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:35,603 INFO L225 Difference]: With dead ends: 209 [2020-12-22 19:05:35,603 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 19:05:35,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2095, Invalid=6461, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 19:05:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 19:05:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-12-22 19:05:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-22 19:05:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 220 transitions. [2020-12-22 19:05:35,611 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 220 transitions. Word has length 153 [2020-12-22 19:05:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:35,611 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 220 transitions. [2020-12-22 19:05:35,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 19:05:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 220 transitions. [2020-12-22 19:05:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 19:05:35,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:35,612 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:05:35,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 19:05:35,827 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:35,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:35,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1430874703, now seen corresponding path program 25 times [2020-12-22 19:05:35,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:35,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097140625] [2020-12-22 19:05:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:36,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097140625] [2020-12-22 19:05:36,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841773124] [2020-12-22 19:05:36,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:05:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:37,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:37,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 19:05:37,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249040692] [2020-12-22 19:05:37,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:05:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:05:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:05:37,146 INFO L87 Difference]: Start difference. First operand 209 states and 220 transitions. Second operand 37 states. [2020-12-22 19:05:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:37,358 INFO L93 Difference]: Finished difference Result 216 states and 227 transitions. [2020-12-22 19:05:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 19:05:37,359 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 164 [2020-12-22 19:05:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:37,360 INFO L225 Difference]: With dead ends: 216 [2020-12-22 19:05:37,361 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 19:05:37,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:05:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 19:05:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-12-22 19:05:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 19:05:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 224 transitions. [2020-12-22 19:05:37,366 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 224 transitions. Word has length 164 [2020-12-22 19:05:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:37,367 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 224 transitions. [2020-12-22 19:05:37,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:05:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 224 transitions. [2020-12-22 19:05:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 19:05:37,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:37,368 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:05:37,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:05:37,582 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash 879063604, now seen corresponding path program 26 times [2020-12-22 19:05:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:37,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665401309] [2020-12-22 19:05:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665401309] [2020-12-22 19:05:38,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818046814] [2020-12-22 19:05:38,527 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:38,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:38,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:38,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:38,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 19:05:38,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094064883] [2020-12-22 19:05:38,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:05:38,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:05:38,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:38,901 INFO L87 Difference]: Start difference. First operand 213 states and 224 transitions. Second operand 38 states. [2020-12-22 19:05:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:39,134 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-12-22 19:05:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 19:05:39,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 168 [2020-12-22 19:05:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:39,137 INFO L225 Difference]: With dead ends: 220 [2020-12-22 19:05:39,137 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 19:05:39,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 19:05:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-12-22 19:05:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 19:05:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 228 transitions. [2020-12-22 19:05:39,144 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 228 transitions. Word has length 168 [2020-12-22 19:05:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:39,144 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 228 transitions. [2020-12-22 19:05:39,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:05:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 228 transitions. [2020-12-22 19:05:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 19:05:39,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:39,146 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 9, 9, 9, 1, 1, 1, 1, 1] [2020-12-22 19:05:39,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 19:05:39,362 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1518097719, now seen corresponding path program 27 times [2020-12-22 19:05:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:39,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686203077] [2020-12-22 19:05:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686203077] [2020-12-22 19:05:40,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305745956] [2020-12-22 19:05:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:40,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 19:05:40,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:05:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:40,475 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:05:40,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:40,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:40,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:05:40,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:05:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 137 proven. 117 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2020-12-22 19:05:41,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:41,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 16] total 53 [2020-12-22 19:05:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892423974] [2020-12-22 19:05:41,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 19:05:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 19:05:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=1983, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:05:41,423 INFO L87 Difference]: Start difference. First operand 217 states and 228 transitions. Second operand 53 states. [2020-12-22 19:05:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:45,334 INFO L93 Difference]: Finished difference Result 234 states and 246 transitions. [2020-12-22 19:05:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 19:05:45,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 172 [2020-12-22 19:05:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:45,339 INFO L225 Difference]: With dead ends: 234 [2020-12-22 19:05:45,340 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 19:05:45,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2427, Invalid=7673, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 19:05:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 19:05:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-12-22 19:05:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-22 19:05:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 244 transitions. [2020-12-22 19:05:45,346 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 244 transitions. Word has length 172 [2020-12-22 19:05:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:45,346 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 244 transitions. [2020-12-22 19:05:45,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 19:05:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 244 transitions. [2020-12-22 19:05:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-22 19:05:45,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:45,348 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:05:45,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:05:45,564 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1355182115, now seen corresponding path program 28 times [2020-12-22 19:05:45,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:45,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719243801] [2020-12-22 19:05:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2846 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719243801] [2020-12-22 19:05:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780012208] [2020-12-22 19:05:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:48,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:05:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2846 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:49,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:49,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 19:05:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540867336] [2020-12-22 19:05:49,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 19:05:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 19:05:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:05:49,111 INFO L87 Difference]: Start difference. First operand 232 states and 244 transitions. Second operand 41 states. [2020-12-22 19:05:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:49,362 INFO L93 Difference]: Finished difference Result 239 states and 251 transitions. [2020-12-22 19:05:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 19:05:49,363 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-22 19:05:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:49,365 INFO L225 Difference]: With dead ends: 239 [2020-12-22 19:05:49,365 INFO L226 Difference]: Without dead ends: 239 [2020-12-22 19:05:49,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 19:05:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-22 19:05:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2020-12-22 19:05:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-22 19:05:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 248 transitions. [2020-12-22 19:05:49,372 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 248 transitions. Word has length 183 [2020-12-22 19:05:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:49,373 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 248 transitions. [2020-12-22 19:05:49,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 19:05:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 248 transitions. [2020-12-22 19:05:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-22 19:05:49,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:49,375 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:05:49,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:05:49,587 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -690624902, now seen corresponding path program 29 times [2020-12-22 19:05:49,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:49,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431896537] [2020-12-22 19:05:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2995 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:50,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431896537] [2020-12-22 19:05:50,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072643252] [2020-12-22 19:05:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:56,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2020-12-22 19:05:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 19:05:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2995 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:56,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:56,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 19:05:56,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924695874] [2020-12-22 19:05:56,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 19:05:56,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:56,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 19:05:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:05:56,695 INFO L87 Difference]: Start difference. First operand 236 states and 248 transitions. Second operand 42 states. [2020-12-22 19:05:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:56,917 INFO L93 Difference]: Finished difference Result 243 states and 255 transitions. [2020-12-22 19:05:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 19:05:56,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 187 [2020-12-22 19:05:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:56,920 INFO L225 Difference]: With dead ends: 243 [2020-12-22 19:05:56,920 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 19:05:56,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:05:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 19:05:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2020-12-22 19:05:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-22 19:05:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 252 transitions. [2020-12-22 19:05:56,925 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 252 transitions. Word has length 187 [2020-12-22 19:05:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:56,926 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 252 transitions. [2020-12-22 19:05:56,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 19:05:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 252 transitions. [2020-12-22 19:05:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-22 19:05:56,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:56,927 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-22 19:05:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:05:57,142 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:05:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1795447145, now seen corresponding path program 30 times [2020-12-22 19:05:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:57,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360818549] [2020-12-22 19:05:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:58,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360818549] [2020-12-22 19:05:58,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245904152] [2020-12-22 19:05:58,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:58,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 19:05:58,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 19:05:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3148 backedges. 153 proven. 145 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2020-12-22 19:06:00,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:00,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 19] total 60 [2020-12-22 19:06:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260859751] [2020-12-22 19:06:00,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 19:06:00,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:00,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 19:06:00,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=2591, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 19:06:00,109 INFO L87 Difference]: Start difference. First operand 240 states and 252 transitions. Second operand 60 states. [2020-12-22 19:06:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:05,813 INFO L93 Difference]: Finished difference Result 255 states and 268 transitions. [2020-12-22 19:06:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 19:06:05,814 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 191 [2020-12-22 19:06:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:05,816 INFO L225 Difference]: With dead ends: 255 [2020-12-22 19:06:05,816 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 19:06:05,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3118, Invalid=9538, Unknown=0, NotChecked=0, Total=12656 [2020-12-22 19:06:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 19:06:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2020-12-22 19:06:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-22 19:06:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 268 transitions. [2020-12-22 19:06:05,823 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 268 transitions. Word has length 191 [2020-12-22 19:06:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:05,823 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 268 transitions. [2020-12-22 19:06:05,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 19:06:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 268 transitions. [2020-12-22 19:06:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 19:06:05,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:05,825 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:06:06,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 19:06:06,040 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2032476873, now seen corresponding path program 31 times [2020-12-22 19:06:06,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:06,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514584053] [2020-12-22 19:06:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:06:07,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514584053] [2020-12-22 19:06:07,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054498794] [2020-12-22 19:06:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 19:06:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:06:07,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:07,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 19:06:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833669861] [2020-12-22 19:06:07,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 19:06:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:07,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 19:06:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:06:07,854 INFO L87 Difference]: Start difference. First operand 255 states and 268 transitions. Second operand 45 states. [2020-12-22 19:06:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:08,171 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2020-12-22 19:06:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 19:06:08,172 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 202 [2020-12-22 19:06:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:08,176 INFO L225 Difference]: With dead ends: 262 [2020-12-22 19:06:08,176 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 19:06:08,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:06:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 19:06:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2020-12-22 19:06:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 19:06:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 272 transitions. [2020-12-22 19:06:08,182 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 272 transitions. Word has length 202 [2020-12-22 19:06:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 272 transitions. [2020-12-22 19:06:08,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 19:06:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 272 transitions. [2020-12-22 19:06:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 19:06:08,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:08,184 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:06:08,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:08,398 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash 5080332, now seen corresponding path program 32 times [2020-12-22 19:06:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:08,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108834213] [2020-12-22 19:06:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3662 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:06:09,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108834213] [2020-12-22 19:06:09,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155309647] [2020-12-22 19:06:09,884 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:10,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:10,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:06:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3662 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:06:10,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:10,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 19:06:10,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839995522] [2020-12-22 19:06:10,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 19:06:10,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 19:06:10,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:06:10,303 INFO L87 Difference]: Start difference. First operand 259 states and 272 transitions. Second operand 46 states. [2020-12-22 19:06:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:10,602 INFO L93 Difference]: Finished difference Result 266 states and 279 transitions. [2020-12-22 19:06:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 19:06:10,603 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 206 [2020-12-22 19:06:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:10,604 INFO L225 Difference]: With dead ends: 266 [2020-12-22 19:06:10,604 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 19:06:10,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:06:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 19:06:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-12-22 19:06:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-22 19:06:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 276 transitions. [2020-12-22 19:06:10,610 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 276 transitions. Word has length 206 [2020-12-22 19:06:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:10,611 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 276 transitions. [2020-12-22 19:06:10,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 19:06:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 276 transitions. [2020-12-22 19:06:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 19:06:10,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:10,612 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 11, 11, 11, 1, 1, 1, 1, 1] [2020-12-22 19:06:10,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:10,827 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 472190415, now seen corresponding path program 33 times [2020-12-22 19:06:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:10,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938207992] [2020-12-22 19:06:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:06:12,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938207992] [2020-12-22 19:06:12,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896218428] [2020-12-22 19:06:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:12,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 19:06:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:12,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 19:06:12,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:12,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:06:12,640 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:06:12,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:06:12,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:06:12,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:06:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 169 proven. 176 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2020-12-22 19:06:13,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:13,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 18] total 63 [2020-12-22 19:06:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560296018] [2020-12-22 19:06:13,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 19:06:13,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 19:06:13,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=2778, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 19:06:13,968 INFO L87 Difference]: Start difference. First operand 263 states and 276 transitions. Second operand 63 states. [2020-12-22 19:06:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:19,401 INFO L93 Difference]: Finished difference Result 280 states and 294 transitions. [2020-12-22 19:06:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 19:06:19,402 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 210 [2020-12-22 19:06:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:19,404 INFO L225 Difference]: With dead ends: 280 [2020-12-22 19:06:19,404 INFO L226 Difference]: Without dead ends: 280 [2020-12-22 19:06:19,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3520, Invalid=11000, Unknown=0, NotChecked=0, Total=14520 [2020-12-22 19:06:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-22 19:06:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 278. [2020-12-22 19:06:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-22 19:06:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 292 transitions. [2020-12-22 19:06:19,412 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 292 transitions. Word has length 210 [2020-12-22 19:06:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:19,412 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 292 transitions. [2020-12-22 19:06:19,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 19:06:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 292 transitions. [2020-12-22 19:06:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 19:06:19,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:19,414 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:06:19,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:19,629 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1419416773, now seen corresponding path program 34 times [2020-12-22 19:06:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315777178] [2020-12-22 19:06:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4215 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:06:21,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315777178] [2020-12-22 19:06:21,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114780246] [2020-12-22 19:06:21,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:24,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:06:24,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 19:06:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4215 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:06:24,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:24,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 19:06:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016041526] [2020-12-22 19:06:24,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:06:24,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:06:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:06:24,782 INFO L87 Difference]: Start difference. First operand 278 states and 292 transitions. Second operand 49 states. [2020-12-22 19:06:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:25,103 INFO L93 Difference]: Finished difference Result 285 states and 299 transitions. [2020-12-22 19:06:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 19:06:25,104 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 221 [2020-12-22 19:06:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:25,105 INFO L225 Difference]: With dead ends: 285 [2020-12-22 19:06:25,105 INFO L226 Difference]: Without dead ends: 285 [2020-12-22 19:06:25,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:06:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-22 19:06:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-12-22 19:06:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 19:06:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 296 transitions. [2020-12-22 19:06:25,112 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 296 transitions. Word has length 221 [2020-12-22 19:06:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:25,112 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 296 transitions. [2020-12-22 19:06:25,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:06:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 296 transitions. [2020-12-22 19:06:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 19:06:25,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:25,114 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:06:25,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 19:06:25,314 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:06:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2145258914, now seen corresponding path program 35 times [2020-12-22 19:06:25,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643998012] [2020-12-22 19:06:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4396 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:06:27,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643998012] [2020-12-22 19:06:27,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078482529] [2020-12-22 19:06:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:01,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2020-12-22 19:07:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:07:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4396 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:07:01,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:01,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 19:07:01,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740942932] [2020-12-22 19:07:01,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 19:07:01,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 19:07:01,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:07:01,458 INFO L87 Difference]: Start difference. First operand 282 states and 296 transitions. Second operand 50 states. [2020-12-22 19:07:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:01,803 INFO L93 Difference]: Finished difference Result 289 states and 303 transitions. [2020-12-22 19:07:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 19:07:01,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 225 [2020-12-22 19:07:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:01,806 INFO L225 Difference]: With dead ends: 289 [2020-12-22 19:07:01,806 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 19:07:01,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:07:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 19:07:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-12-22 19:07:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-22 19:07:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 300 transitions. [2020-12-22 19:07:01,813 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 300 transitions. Word has length 225 [2020-12-22 19:07:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:01,813 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 300 transitions. [2020-12-22 19:07:01,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 19:07:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 300 transitions. [2020-12-22 19:07:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 19:07:01,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:01,815 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 12, 12, 12, 1, 1, 1, 1, 1] [2020-12-22 19:07:02,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:02,029 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash -120598529, now seen corresponding path program 36 times [2020-12-22 19:07:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:02,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403222919] [2020-12-22 19:07:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4581 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:07:03,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403222919] [2020-12-22 19:07:03,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184479531] [2020-12-22 19:07:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:07,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 19:07:07,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:07:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4581 backedges. 139 proven. 210 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-12-22 19:07:08,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:08,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 19] total 68 [2020-12-22 19:07:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492978705] [2020-12-22 19:07:08,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 19:07:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 19:07:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3227, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 19:07:08,891 INFO L87 Difference]: Start difference. First operand 286 states and 300 transitions. Second operand 68 states. [2020-12-22 19:07:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:21,206 INFO L93 Difference]: Finished difference Result 451 states and 481 transitions. [2020-12-22 19:07:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-22 19:07:21,207 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 229 [2020-12-22 19:07:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:21,210 INFO L225 Difference]: With dead ends: 451 [2020-12-22 19:07:21,210 INFO L226 Difference]: Without dead ends: 451 [2020-12-22 19:07:21,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=5374, Invalid=23356, Unknown=0, NotChecked=0, Total=28730 [2020-12-22 19:07:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-12-22 19:07:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 297. [2020-12-22 19:07:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-22 19:07:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 312 transitions. [2020-12-22 19:07:21,218 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 312 transitions. Word has length 229 [2020-12-22 19:07:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:21,218 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 312 transitions. [2020-12-22 19:07:21,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 19:07:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 312 transitions. [2020-12-22 19:07:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 19:07:21,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:21,220 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:07:21,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:21,436 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1508205986, now seen corresponding path program 37 times [2020-12-22 19:07:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:21,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407672680] [2020-12-22 19:07:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4807 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:07:23,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407672680] [2020-12-22 19:07:23,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845799577] [2020-12-22 19:07:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:23,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 19:07:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4807 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:07:24,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:24,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 19:07:24,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791128646] [2020-12-22 19:07:24,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 19:07:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 19:07:24,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:07:24,031 INFO L87 Difference]: Start difference. First operand 297 states and 312 transitions. Second operand 52 states. [2020-12-22 19:07:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:24,462 INFO L93 Difference]: Finished difference Result 304 states and 319 transitions. [2020-12-22 19:07:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 19:07:24,463 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 236 [2020-12-22 19:07:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:24,465 INFO L225 Difference]: With dead ends: 304 [2020-12-22 19:07:24,465 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 19:07:24,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:07:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 19:07:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2020-12-22 19:07:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-12-22 19:07:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 316 transitions. [2020-12-22 19:07:24,471 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 316 transitions. Word has length 236 [2020-12-22 19:07:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:24,471 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 316 transitions. [2020-12-22 19:07:24,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 19:07:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 316 transitions. [2020-12-22 19:07:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 19:07:24,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:24,473 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:07:24,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:07:24,688 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1197779937, now seen corresponding path program 38 times [2020-12-22 19:07:24,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:24,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81218577] [2020-12-22 19:07:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:07:26,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81218577] [2020-12-22 19:07:26,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217141421] [2020-12-22 19:07:26,852 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:27,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:07:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:27,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 19:07:27,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:07:27,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:27,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 19:07:27,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137859435] [2020-12-22 19:07:27,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 19:07:27,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 19:07:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:07:27,368 INFO L87 Difference]: Start difference. First operand 301 states and 316 transitions. Second operand 53 states. [2020-12-22 19:07:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:27,740 INFO L93 Difference]: Finished difference Result 308 states and 323 transitions. [2020-12-22 19:07:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 19:07:27,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 240 [2020-12-22 19:07:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:27,747 INFO L225 Difference]: With dead ends: 308 [2020-12-22 19:07:27,747 INFO L226 Difference]: Without dead ends: 308 [2020-12-22 19:07:27,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 19:07:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-22 19:07:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2020-12-22 19:07:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-22 19:07:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 320 transitions. [2020-12-22 19:07:27,753 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 320 transitions. Word has length 240 [2020-12-22 19:07:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:27,753 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 320 transitions. [2020-12-22 19:07:27,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 19:07:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 320 transitions. [2020-12-22 19:07:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 19:07:27,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:27,755 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 13, 13, 13, 1, 1, 1, 1, 1] [2020-12-22 19:07:27,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 19:07:27,969 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash 712262628, now seen corresponding path program 39 times [2020-12-22 19:07:27,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:27,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471330148] [2020-12-22 19:07:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5197 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:07:30,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471330148] [2020-12-22 19:07:30,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214816452] [2020-12-22 19:07:30,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 19:07:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:30,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:07:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:30,468 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:07:30,469 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:07:30,475 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:07:30,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:07:30,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:07:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5197 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2020-12-22 19:07:32,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:32,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 18] total 70 [2020-12-22 19:07:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262563666] [2020-12-22 19:07:32,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 19:07:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 19:07:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=3339, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:07:32,270 INFO L87 Difference]: Start difference. First operand 305 states and 320 transitions. Second operand 70 states. [2020-12-22 19:07:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:39,097 INFO L93 Difference]: Finished difference Result 321 states and 337 transitions. [2020-12-22 19:07:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 19:07:39,098 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 244 [2020-12-22 19:07:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:39,100 INFO L225 Difference]: With dead ends: 321 [2020-12-22 19:07:39,100 INFO L226 Difference]: Without dead ends: 321 [2020-12-22 19:07:39,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4531, Invalid=14101, Unknown=0, NotChecked=0, Total=18632 [2020-12-22 19:07:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-22 19:07:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-12-22 19:07:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-22 19:07:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 332 transitions. [2020-12-22 19:07:39,106 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 332 transitions. Word has length 244 [2020-12-22 19:07:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:39,107 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 332 transitions. [2020-12-22 19:07:39,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 19:07:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 332 transitions. [2020-12-22 19:07:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 19:07:39,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:39,108 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-22 19:07:39,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:07:39,322 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1203698701, now seen corresponding path program 40 times [2020-12-22 19:07:39,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:39,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791491642] [2020-12-22 19:07:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5438 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:07:41,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791491642] [2020-12-22 19:07:41,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740260851] [2020-12-22 19:07:41,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:47,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:07:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 19:07:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5438 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:07:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:48,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 19:07:48,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974835695] [2020-12-22 19:07:48,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 19:07:48,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:48,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 19:07:48,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 19:07:48,345 INFO L87 Difference]: Start difference. First operand 316 states and 332 transitions. Second operand 55 states. [2020-12-22 19:07:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:48,726 INFO L93 Difference]: Finished difference Result 323 states and 339 transitions. [2020-12-22 19:07:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 19:07:48,727 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 251 [2020-12-22 19:07:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:48,731 INFO L225 Difference]: With dead ends: 323 [2020-12-22 19:07:48,732 INFO L226 Difference]: Without dead ends: 323 [2020-12-22 19:07:48,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 19:07:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-12-22 19:07:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2020-12-22 19:07:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 19:07:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 336 transitions. [2020-12-22 19:07:48,738 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 336 transitions. Word has length 251 [2020-12-22 19:07:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:48,738 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 336 transitions. [2020-12-22 19:07:48,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 19:07:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 336 transitions. [2020-12-22 19:07:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 19:07:48,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:48,740 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-22 19:07:48,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:48,954 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:07:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 924277776, now seen corresponding path program 41 times [2020-12-22 19:07:48,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:48,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265113483] [2020-12-22 19:07:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5643 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:07:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265113483] [2020-12-22 19:07:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418885447] [2020-12-22 19:07:51,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true