/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/memsafety/960521-1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:05:05,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:05:05,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:05:05,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:05:05,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:05:05,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:05:05,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:05:05,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:05:05,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:05:05,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:05:05,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:05:05,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:05:05,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:05:05,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:05:05,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:05:05,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:05:05,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:05:05,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:05:05,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:05:05,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:05:05,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:05:05,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:05:05,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:05:05,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:05:05,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 19:05:05,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 19:05:05,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 19:05:05,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 19:05:05,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 19:05:05,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 19:05:05,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:05:05,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:05:05,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:05:05,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:05:05,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:05:05,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:05:05,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:05:05,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:05:05,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:05:05,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:05:05,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:05:05,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:05:05,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:05:05,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:05:05,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:05:05,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:05:05,930 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:05:05,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:05:05,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:05:05,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:05:05,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:05:05,933 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:05:05,934 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:05:05,934 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:05:05,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:05:05,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:05:05,934 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:05:05,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:05:05,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:05:05,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:05:05,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:05,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:05:05,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:05:05,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:05:05,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:05:05,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:05:05,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:05:06,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:05:06,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:05:06,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:05:06,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:05:06,445 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:05:06,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2020-12-22 19:05:06,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bbb0bff/f66c342f94094919b9d3bed107db9ff7/FLAGc1fc8847c [2020-12-22 19:05:07,147 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:07,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2020-12-22 19:05:07,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bbb0bff/f66c342f94094919b9d3bed107db9ff7/FLAGc1fc8847c [2020-12-22 19:05:07,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06bbb0bff/f66c342f94094919b9d3bed107db9ff7 [2020-12-22 19:05:07,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:07,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:07,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:07,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:07,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:07,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:07" (1/1) ... [2020-12-22 19:05:07,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246d8243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:07, skipping insertion in model container [2020-12-22 19:05:07,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:07" (1/1) ... [2020-12-22 19:05:07,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:07,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:07,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:07,924 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:07,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:08,038 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:08,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08 WrapperNode [2020-12-22 19:05:08,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:08,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:08,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:08,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:08,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:08,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:08,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:08,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:08,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (1/1) ... [2020-12-22 19:05:08,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:08,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:08,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:08,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:08,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (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 19:05:08,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:08,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:05:08,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:08,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:05:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:08,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:08,752 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:08,752 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 19:05:08,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:08 BoogieIcfgContainer [2020-12-22 19:05:08,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:08,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:08,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:08,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:08,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:07" (1/3) ... [2020-12-22 19:05:08,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b49026f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:08, skipping insertion in model container [2020-12-22 19:05:08,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:08" (2/3) ... [2020-12-22 19:05:08,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b49026f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:08, skipping insertion in model container [2020-12-22 19:05:08,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:08" (3/3) ... [2020-12-22 19:05:08,763 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2020-12-22 19:05:08,769 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:08,775 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-22 19:05:08,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-22 19:05:08,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:08,866 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:08,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:08,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:08,867 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:08,867 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:08,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:08,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-22 19:05:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:08,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:08,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:08,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-22 19:05:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859686034] [2020-12-22 19:05:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,154 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 19:05:09,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859686034] [2020-12-22 19:05:09,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:09,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509033205] [2020-12-22 19:05:09,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:09,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:09,187 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-22 19:05:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,300 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:09,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,317 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:09,318 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:05:09,323 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 19:05:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:05:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 19:05:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:05:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-22 19:05:09,374 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2020-12-22 19:05:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,375 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-22 19:05:09,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-22 19:05:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:09,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:09,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:09,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-22 19:05:09,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807235240] [2020-12-22 19:05:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,508 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 19:05:09,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807235240] [2020-12-22 19:05:09,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:09,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:09,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653767267] [2020-12-22 19:05:09,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:09,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:09,514 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2020-12-22 19:05:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,546 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 19:05:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:09,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,548 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:05:09,548 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:05:09,550 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 19:05:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:05:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:05:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 19:05:09,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2020-12-22 19:05:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,560 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 19:05:09,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 19:05:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:09,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:09,561 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,562 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2020-12-22 19:05:09,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158599468] [2020-12-22 19:05:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,624 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 19:05:09,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158599468] [2020-12-22 19:05:09,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:09,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63859255] [2020-12-22 19:05:09,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:09,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:09,628 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-12-22 19:05:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,679 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 19:05:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:09,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 19:05:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,681 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:05:09,681 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:05:09,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:05:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:05:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-22 19:05:09,687 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2020-12-22 19:05:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,687 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-22 19:05:09,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-22 19:05:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:09,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:09,689 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2020-12-22 19:05:09,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049984563] [2020-12-22 19:05:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:09,791 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 19:05:09,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049984563] [2020-12-22 19:05:09,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:09,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:09,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823677206] [2020-12-22 19:05:09,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:09,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:09,795 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2020-12-22 19:05:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:09,924 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:09,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 19:05:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:09,926 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:09,926 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 19:05:09,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 19:05:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-22 19:05:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 19:05:09,933 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-12-22 19:05:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:09,933 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 19:05:09,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:09,934 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 19:05:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:05:09,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:09,934 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:09,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:09,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2020-12-22 19:05:09,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:09,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705932883] [2020-12-22 19:05:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,083 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 19:05:10,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705932883] [2020-12-22 19:05:10,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644632051] [2020-12-22 19:05:10,084 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 19:05:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:10,281 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:10,282 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:10,284 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:10,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:10,306 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:10,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-22 19:05:10,408 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 19:05:10,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:10,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-22 19:05:10,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067935071] [2020-12-22 19:05:10,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:05:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:05:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:05:10,411 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2020-12-22 19:05:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:10,638 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 19:05:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:10,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 19:05:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:10,639 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:05:10,640 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:10,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:05:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-12-22 19:05:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:05:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 19:05:10,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2020-12-22 19:05:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:10,646 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 19:05:10,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:05:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 19:05:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:10,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:10,647 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:05:10,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:10,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2020-12-22 19:05:10,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:10,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278263327] [2020-12-22 19:05:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278263327] [2020-12-22 19:05:11,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342421353] [2020-12-22 19:05:11,042 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 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 19:05:11,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:11,133 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:11,133 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:11,135 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:11,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:11,146 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:11,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-22 19:05:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:11,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:11,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 19:05:11,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643773952] [2020-12-22 19:05:11,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:05:11,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:05:11,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:11,296 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2020-12-22 19:05:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:11,665 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-22 19:05:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:11,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-22 19:05:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:11,675 INFO L225 Difference]: With dead ends: 120 [2020-12-22 19:05:11,675 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 19:05:11,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 19:05:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2020-12-22 19:05:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:05:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-22 19:05:11,692 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2020-12-22 19:05:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:11,693 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-22 19:05:11,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:05:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-22 19:05:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:11,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:11,694 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:11,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:11,895 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2020-12-22 19:05:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:11,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595834971] [2020-12-22 19:05:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:05:11,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595834971] [2020-12-22 19:05:11,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:11,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849674310] [2020-12-22 19:05:11,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:11,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:11,983 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-12-22 19:05:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,044 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:05:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:12,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:05:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,046 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:12,046 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:05:12,046 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 19:05:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:05:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:05:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:05:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 19:05:12,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2020-12-22 19:05:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,060 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 19:05:12,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 19:05:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:12,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:12,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:12,061 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2020-12-22 19:05:12,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:12,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991957749] [2020-12-22 19:05:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991957749] [2020-12-22 19:05:12,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696655582] [2020-12-22 19:05:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:12,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:05:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208548904] [2020-12-22 19:05:12,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:05:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:05:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:12,362 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2020-12-22 19:05:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:12,473 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-22 19:05:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:12,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-22 19:05:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:12,476 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:12,477 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:12,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-22 19:05:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-22 19:05:12,495 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2020-12-22 19:05:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:12,495 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-22 19:05:12,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:05:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-22 19:05:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:05:12,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:12,496 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:12,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:12,712 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2020-12-22 19:05:12,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:12,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165911346] [2020-12-22 19:05:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:05:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165911346] [2020-12-22 19:05:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859996476] [2020-12-22 19:05:12,817 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 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 19:05:12,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:12,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:12,926 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:12,926 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:12,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:12,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:12,946 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:12,946 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:05:13,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:13,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-22 19:05:13,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502684171] [2020-12-22 19:05:13,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:13,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:13,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:13,082 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2020-12-22 19:05:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,179 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-22 19:05:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:13,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 19:05:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,182 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:13,182 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:05:13,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:05:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:05:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:05:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-22 19:05:13,192 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 23 [2020-12-22 19:05:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,193 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-22 19:05:13,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-22 19:05:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:13,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:13,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:13,410 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2020-12-22 19:05:13,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:13,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731196342] [2020-12-22 19:05:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:13,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731196342] [2020-12-22 19:05:13,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777542091] [2020-12-22 19:05:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:05:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:05:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:13,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:13,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 19:05:13,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579492302] [2020-12-22 19:05:13,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:05:13,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:13,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:05:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:13,705 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 15 states. [2020-12-22 19:05:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:13,838 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-22 19:05:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:05:13,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-22 19:05:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:13,839 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:05:13,839 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:05:13,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:05:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-12-22 19:05:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:05:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-22 19:05:13,850 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 26 [2020-12-22 19:05:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:13,850 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-22 19:05:13,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:05:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-22 19:05:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:05:13,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:13,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:05:14,063 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2020-12-22 19:05:14,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775731445] [2020-12-22 19:05:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:14,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775731445] [2020-12-22 19:05:14,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906675057] [2020-12-22 19:05:14,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:05:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:14,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:14,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-22 19:05:14,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150402388] [2020-12-22 19:05:14,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:14,414 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2020-12-22 19:05:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:14,549 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-12-22 19:05:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:14,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-22 19:05:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:14,550 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:05:14,550 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:05:14,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:05:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-12-22 19:05:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-22 19:05:14,554 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 29 [2020-12-22 19:05:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:14,554 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-22 19:05:14,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-22 19:05:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 19:05:14,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:14,555 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:14,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:14,769 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2020-12-22 19:05:14,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:14,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730287200] [2020-12-22 19:05:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:05:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730287200] [2020-12-22 19:05:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806107053] [2020-12-22 19:05:14,900 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 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 19:05:14,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:14,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:14,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:14,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:14,988 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:14,988 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-22 19:05:14,989 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:15,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:15,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:05:15,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:15,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:15,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-12-22 19:05:15,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835739537] [2020-12-22 19:05:15,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:15,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:15,226 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2020-12-22 19:05:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,324 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-12-22 19:05:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:15,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-22 19:05:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,326 INFO L225 Difference]: With dead ends: 63 [2020-12-22 19:05:15,326 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 19:05:15,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 19:05:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 19:05:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:05:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-22 19:05:15,329 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 32 [2020-12-22 19:05:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,330 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-22 19:05:15,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-22 19:05:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 19:05:15,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,340 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:15,550 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1172416315, now seen corresponding path program 1 times [2020-12-22 19:05:15,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053830647] [2020-12-22 19:05:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:15,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053830647] [2020-12-22 19:05:15,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020398261] [2020-12-22 19:05:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:05:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:05:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 19:05:15,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:15,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 19:05:15,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976941298] [2020-12-22 19:05:15,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:15,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:15,915 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 19 states. [2020-12-22 19:05:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,056 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 19:05:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:05:16,056 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-12-22 19:05:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,057 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:16,057 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:16,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:05:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-12-22 19:05:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 19:05:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 19:05:16,061 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 53 [2020-12-22 19:05:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,061 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 19:05:16,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 19:05:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:05:16,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,062 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:16,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 19:05:16,276 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1736039872, now seen corresponding path program 2 times [2020-12-22 19:05:16,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284311546] [2020-12-22 19:05:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:16,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284311546] [2020-12-22 19:05:16,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482796315] [2020-12-22 19:05:16,423 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 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 19:05:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:16,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:16,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-22 19:05:16,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:16,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2020-12-22 19:05:16,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708291254] [2020-12-22 19:05:16,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:16,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:16,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:16,560 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 3 states. [2020-12-22 19:05:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,572 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-22 19:05:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:16,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 19:05:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,574 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:05:16,574 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:05:16,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:05:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 19:05:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 19:05:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-22 19:05:16,576 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-12-22 19:05:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,577 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-22 19:05:16,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-22 19:05:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:05:16,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,578 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:16,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:16,793 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1887003102, now seen corresponding path program 1 times [2020-12-22 19:05:16,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077114760] [2020-12-22 19:05:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:16,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077114760] [2020-12-22 19:05:16,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098048640] [2020-12-22 19:05:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:05:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 19:05:17,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-22 19:05:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602622936] [2020-12-22 19:05:17,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:05:17,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:05:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:17,200 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 21 states. [2020-12-22 19:05:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,367 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-12-22 19:05:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:17,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-12-22 19:05:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,368 INFO L225 Difference]: With dead ends: 77 [2020-12-22 19:05:17,369 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 19:05:17,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 19:05:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-12-22 19:05:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 19:05:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-12-22 19:05:17,381 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 61 [2020-12-22 19:05:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,381 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-12-22 19:05:17,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:05:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-12-22 19:05:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:05:17,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,383 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:17,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:05:17,598 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1202087175, now seen corresponding path program 2 times [2020-12-22 19:05:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263044446] [2020-12-22 19:05:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263044446] [2020-12-22 19:05:17,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208770494] [2020-12-22 19:05:17,719 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 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 19:05:17,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:18,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-22 19:05:18,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23162934] [2020-12-22 19:05:18,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:05:18,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:05:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:05:18,037 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2020-12-22 19:05:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,226 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-12-22 19:05:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:05:18,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-12-22 19:05:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,228 INFO L225 Difference]: With dead ends: 83 [2020-12-22 19:05:18,228 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 19:05:18,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 19:05:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-12-22 19:05:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 19:05:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-22 19:05:18,232 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 67 [2020-12-22 19:05:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,232 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-22 19:05:18,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:05:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-22 19:05:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 19:05:18,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,233 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:05:18,447 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash 835466114, now seen corresponding path program 3 times [2020-12-22 19:05:18,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353734518] [2020-12-22 19:05:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353734518] [2020-12-22 19:05:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826639745] [2020-12-22 19:05:18,594 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 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 19:05:18,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-22 19:05:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:19,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:19,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2020-12-22 19:05:19,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932012974] [2020-12-22 19:05:19,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:05:19,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:19,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:05:19,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:05:19,122 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 25 states. [2020-12-22 19:05:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,320 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-12-22 19:05:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:19,322 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-12-22 19:05:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,323 INFO L225 Difference]: With dead ends: 89 [2020-12-22 19:05:19,323 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 19:05:19,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 19:05:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-12-22 19:05:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 19:05:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-12-22 19:05:19,327 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 73 [2020-12-22 19:05:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,327 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-12-22 19:05:19,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:05:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-12-22 19:05:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 19:05:19,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,328 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:19,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:05:19,542 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1843123545, now seen corresponding path program 4 times [2020-12-22 19:05:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534172383] [2020-12-22 19:05:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:05:19,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534172383] [2020-12-22 19:05:19,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912087208] [2020-12-22 19:05:19,734 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 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 19:05:20,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:20,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:05:20,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:20,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-22 19:05:20,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101815268] [2020-12-22 19:05:20,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:05:20,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:05:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:05:20,477 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 27 states. [2020-12-22 19:05:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:20,671 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2020-12-22 19:05:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:20,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-12-22 19:05:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:20,672 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:05:20,673 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:05:20,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=299, Invalid=457, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:05:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-12-22 19:05:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 19:05:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-22 19:05:20,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 79 [2020-12-22 19:05:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:20,676 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-22 19:05:20,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:05:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-22 19:05:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 19:05:20,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:20,678 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:20,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:05:20,892 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1384358114, now seen corresponding path program 5 times [2020-12-22 19:05:20,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238883666] [2020-12-22 19:05:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238883666] [2020-12-22 19:05:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677100856] [2020-12-22 19:05:21,068 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 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 19:05:23,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 19:05:23,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:23,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:23,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 19:05:23,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277838275] [2020-12-22 19:05:23,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:05:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:05:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:23,927 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 16 states. [2020-12-22 19:05:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:24,070 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-12-22 19:05:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:05:24,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-12-22 19:05:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:24,072 INFO L225 Difference]: With dead ends: 102 [2020-12-22 19:05:24,072 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 19:05:24,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 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 19:05:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 19:05:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-12-22 19:05:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 19:05:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-22 19:05:24,075 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2020-12-22 19:05:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:24,076 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-22 19:05:24,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:05:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-22 19:05:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 19:05:24,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:24,077 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:24,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:24,289 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1888928097, now seen corresponding path program 6 times [2020-12-22 19:05:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:24,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650500857] [2020-12-22 19:05:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650500857] [2020-12-22 19:05:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615035407] [2020-12-22 19:05:24,480 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 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 19:05:26,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 19:05:26,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:26,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:26,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:26,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 19:05:26,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377215106] [2020-12-22 19:05:26,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:26,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:26,535 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 17 states. [2020-12-22 19:05:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:26,720 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2020-12-22 19:05:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:05:26,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-12-22 19:05:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:26,722 INFO L225 Difference]: With dead ends: 109 [2020-12-22 19:05:26,722 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 19:05:26,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 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 19:05:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 19:05:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2020-12-22 19:05:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 19:05:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-12-22 19:05:26,725 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 88 [2020-12-22 19:05:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:26,725 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-12-22 19:05:26,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-12-22 19:05:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 19:05:26,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:26,727 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:26,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:26,940 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1147755650, now seen corresponding path program 7 times [2020-12-22 19:05:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:26,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789274796] [2020-12-22 19:05:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:27,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789274796] [2020-12-22 19:05:27,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221475373] [2020-12-22 19:05:27,132 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 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 19:05:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:27,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:27,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-12-22 19:05:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571127225] [2020-12-22 19:05:27,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:05:27,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:05:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=559, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:05:27,531 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 31 states. [2020-12-22 19:05:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:27,857 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-12-22 19:05:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:05:27,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-12-22 19:05:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:27,858 INFO L225 Difference]: With dead ends: 113 [2020-12-22 19:05:27,858 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 19:05:27,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 19:05:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-12-22 19:05:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 19:05:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-12-22 19:05:27,862 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 91 [2020-12-22 19:05:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:27,863 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-12-22 19:05:27,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:05:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-12-22 19:05:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 19:05:27,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:27,864 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:28,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:28,080 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:28,081 INFO L82 PathProgramCache]: Analyzing trace with hash -80761369, now seen corresponding path program 8 times [2020-12-22 19:05:28,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:28,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047984960] [2020-12-22 19:05:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 19:05:28,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047984960] [2020-12-22 19:05:28,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90508614] [2020-12-22 19:05:28,305 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 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 19:05:28,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 19:05:28,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 19:05:28,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:28,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-22 19:05:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002698354] [2020-12-22 19:05:28,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:05:28,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:05:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:05:28,928 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 35 states. [2020-12-22 19:05:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:29,191 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-12-22 19:05:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:05:29,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-12-22 19:05:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:29,193 INFO L225 Difference]: With dead ends: 119 [2020-12-22 19:05:29,193 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 19:05:29,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=493, Invalid=767, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:05:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 19:05:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-12-22 19:05:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 19:05:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-12-22 19:05:29,197 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 103 [2020-12-22 19:05:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-12-22 19:05:29,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:05:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-12-22 19:05:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 19:05:29,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:29,199 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:29,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:05:29,414 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:29,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1635779490, now seen corresponding path program 9 times [2020-12-22 19:05:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:29,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872340086] [2020-12-22 19:05:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 19:05:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872340086] [2020-12-22 19:05:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784795250] [2020-12-22 19:05:29,674 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 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 19:05:32,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-22 19:05:32,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 19:05:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 19:05:33,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:33,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2020-12-22 19:05:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056149276] [2020-12-22 19:05:33,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 19:05:33,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 19:05:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 19:05:33,328 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 37 states. [2020-12-22 19:05:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:33,622 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2020-12-22 19:05:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:05:33,623 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-12-22 19:05:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:33,624 INFO L225 Difference]: With dead ends: 125 [2020-12-22 19:05:33,624 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 19:05:33,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=857, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 19:05:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2020-12-22 19:05:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 19:05:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-12-22 19:05:33,628 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 109 [2020-12-22 19:05:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:33,628 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-12-22 19:05:33,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 19:05:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-12-22 19:05:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 19:05:33,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:33,629 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:33,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:05:33,844 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash 736193415, now seen corresponding path program 10 times [2020-12-22 19:05:33,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:33,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533496134] [2020-12-22 19:05:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 19:05:34,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533496134] [2020-12-22 19:05:34,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116537280] [2020-12-22 19:05:34,143 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 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 19:05:40,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 19:05:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:40,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2020-12-22 19:05:40,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489400848] [2020-12-22 19:05:40,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:05:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:05:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=913, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:40,518 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 39 states. [2020-12-22 19:05:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:40,817 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2020-12-22 19:05:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:40,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-12-22 19:05:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:40,819 INFO L225 Difference]: With dead ends: 131 [2020-12-22 19:05:40,819 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 19:05:40,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=952, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:05:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 19:05:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-22 19:05:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 19:05:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-12-22 19:05:40,823 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 115 [2020-12-22 19:05:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:40,823 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-12-22 19:05:40,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:05:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-12-22 19:05:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 19:05:40,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:40,824 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:41,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:05:41,038 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:05:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:41,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1834944254, now seen corresponding path program 11 times [2020-12-22 19:05:41,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:41,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447532701] [2020-12-22 19:05:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:05:41,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447532701] [2020-12-22 19:05:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295183003] [2020-12-22 19:05:41,363 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 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 19:06:23,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 19:06:23,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:06:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:23,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:23,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 19:06:23,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395029042] [2020-12-22 19:06:23,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:06:23,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:06:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:23,370 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 22 states. [2020-12-22 19:06:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:23,601 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-22 19:06:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:06:23,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-22 19:06:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:23,606 INFO L225 Difference]: With dead ends: 138 [2020-12-22 19:06:23,606 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 19:06:23,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 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 19:06:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 19:06:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-12-22 19:06:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 19:06:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-12-22 19:06:23,619 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 121 [2020-12-22 19:06:23,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:23,621 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-12-22 19:06:23,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:06:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-12-22 19:06:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 19:06:23,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:23,623 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:23,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:06:23,824 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2023164607, now seen corresponding path program 12 times [2020-12-22 19:06:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391879143] [2020-12-22 19:06:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:24,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391879143] [2020-12-22 19:06:24,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583492614] [2020-12-22 19:06:24,174 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 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 19:06:31,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 19:06:31,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:06:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 19:06:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855315135] [2020-12-22 19:06:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:06:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:06:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:06:31,327 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 23 states. [2020-12-22 19:06:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:31,577 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2020-12-22 19:06:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:06:31,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-12-22 19:06:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:31,579 INFO L225 Difference]: With dead ends: 145 [2020-12-22 19:06:31,579 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 19:06:31,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 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 19:06:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 19:06:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2020-12-22 19:06:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 19:06:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-12-22 19:06:31,582 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2020-12-22 19:06:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:31,583 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-12-22 19:06:31,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:06:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-12-22 19:06:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 19:06:31,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:31,584 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:31,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:06:31,799 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -68412254, now seen corresponding path program 13 times [2020-12-22 19:06:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71577539] [2020-12-22 19:06:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 19:06:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71577539] [2020-12-22 19:06:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692338766] [2020-12-22 19:06:32,140 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 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 19:06:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:06:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 19:06:32,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:32,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-22 19:06:32,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562511537] [2020-12-22 19:06:32,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:06:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:06:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:06:32,785 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 43 states. [2020-12-22 19:06:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:33,226 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2020-12-22 19:06:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:06:33,226 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-12-22 19:06:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:33,228 INFO L225 Difference]: With dead ends: 149 [2020-12-22 19:06:33,228 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 19:06:33,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:06:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 19:06:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-12-22 19:06:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-22 19:06:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-12-22 19:06:33,232 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 127 [2020-12-22 19:06:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:33,232 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-12-22 19:06:33,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:06:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-12-22 19:06:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 19:06:33,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:33,233 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:33,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:33,449 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:33,450 INFO L82 PathProgramCache]: Analyzing trace with hash 230088391, now seen corresponding path program 14 times [2020-12-22 19:06:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346678233] [2020-12-22 19:06:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-22 19:06:33,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346678233] [2020-12-22 19:06:33,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918427341] [2020-12-22 19:06:33,878 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 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 19:06:34,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:06:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:06:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-22 19:06:34,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:34,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2020-12-22 19:06:34,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306333227] [2020-12-22 19:06:34,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:06:34,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:34,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:06:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:06:34,694 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 47 states. [2020-12-22 19:06:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:35,086 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2020-12-22 19:06:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:06:35,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-12-22 19:06:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:35,088 INFO L225 Difference]: With dead ends: 155 [2020-12-22 19:06:35,088 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 19:06:35,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:06:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 19:06:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2020-12-22 19:06:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 19:06:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-12-22 19:06:35,092 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 139 [2020-12-22 19:06:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:35,093 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-12-22 19:06:35,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:06:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-12-22 19:06:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 19:06:35,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:35,094 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:35,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:06:35,308 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1821273026, now seen corresponding path program 15 times [2020-12-22 19:06:35,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:35,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800926242] [2020-12-22 19:06:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 19:06:35,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800926242] [2020-12-22 19:06:35,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128883433] [2020-12-22 19:06:35,710 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 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 19:06:53,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-22 19:06:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:06:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 19:06:53,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:53,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2020-12-22 19:06:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793240863] [2020-12-22 19:06:53,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:06:53,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:06:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:06:53,928 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 49 states. [2020-12-22 19:06:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:54,330 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2020-12-22 19:06:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:06:54,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-12-22 19:06:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:54,331 INFO L225 Difference]: With dead ends: 161 [2020-12-22 19:06:54,331 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 19:06:54,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:06:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 19:06:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-12-22 19:06:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 19:06:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-12-22 19:06:54,336 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 145 [2020-12-22 19:06:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:54,336 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-12-22 19:06:54,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:06:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-12-22 19:06:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 19:06:54,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:54,337 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:54,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 19:06:54,552 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:06:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:54,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1610705817, now seen corresponding path program 16 times [2020-12-22 19:06:54,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848673441] [2020-12-22 19:06:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 19:06:55,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848673441] [2020-12-22 19:06:55,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342627562] [2020-12-22 19:06:55,002 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 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 19:07:44,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:07:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:07:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 19:07:45,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:45,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-22 19:07:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406292579] [2020-12-22 19:07:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 19:07:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 19:07:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:07:45,289 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 51 states. [2020-12-22 19:07:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:45,741 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2020-12-22 19:07:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:07:45,741 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-12-22 19:07:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:45,742 INFO L225 Difference]: With dead ends: 167 [2020-12-22 19:07:45,742 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 19:07:45,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:07:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 19:07:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-12-22 19:07:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 19:07:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-12-22 19:07:45,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 151 [2020-12-22 19:07:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:45,748 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-12-22 19:07:45,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 19:07:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-12-22 19:07:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 19:07:45,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:45,749 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:45,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:45,963 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-22 19:07:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1765206306, now seen corresponding path program 17 times [2020-12-22 19:07:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:45,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309039264] [2020-12-22 19:07:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-22 19:07:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309039264] [2020-12-22 19:07:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173494664] [2020-12-22 19:07:46,449 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 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