/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/960521-1-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:05:12,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:05:12,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:05:12,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:05:12,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:05:12,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:05:12,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:05:12,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:05:12,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:05:12,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:05:12,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:05:12,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:05:12,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:05:12,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:05:12,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:05:12,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:05:12,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:05:12,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:05:12,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:05:12,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:05:12,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:05:12,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:05:12,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:05:12,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:05:12,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 19:05:12,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 19:05:12,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 19:05:12,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 19:05:12,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 19:05:12,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 19:05:12,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:05:12,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:05:12,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:05:12,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:05:12,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:05:12,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:05:12,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:05:12,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:05:12,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:05:12,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:05:12,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:05:12,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:05:12,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:05:12,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:05:12,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:05:12,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:05:12,262 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:05:12,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:05:12,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:05:12,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:05:12,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:05:12,263 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:05:12,264 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:05:12,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:05:12,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:05:12,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:05:12,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:05:12,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:05:12,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:05:12,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:05:12,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:05:12,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:05:12,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:05:12,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:05:12,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:05:12,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:05:12,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:05:12,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:05:12,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:05:12,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:05:12,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:05:12,695 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:05:12,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-3.i [2020-12-22 19:05:12,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796f2609f/3b9b70cba13445d79e598949a42270e2/FLAG34b236c40 [2020-12-22 19:05:13,487 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:05:13,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-3.i [2020-12-22 19:05:13,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796f2609f/3b9b70cba13445d79e598949a42270e2/FLAG34b236c40 [2020-12-22 19:05:13,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/796f2609f/3b9b70cba13445d79e598949a42270e2 [2020-12-22 19:05:13,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:05:13,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:05:13,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:13,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:05:13,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:05:13,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:13" (1/1) ... [2020-12-22 19:05:13,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11331a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:13, skipping insertion in model container [2020-12-22 19:05:13,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:13" (1/1) ... [2020-12-22 19:05:13,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:05:13,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:05:14,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:14,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:05:14,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:05:14,433 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:05:14,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14 WrapperNode [2020-12-22 19:05:14,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:05:14,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:14,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:05:14,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:05:14,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:05:14,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:05:14,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:05:14,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:05:14,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (1/1) ... [2020-12-22 19:05:14,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:05:14,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:05:14,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:05:14,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:05:14,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (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 19:05:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:05:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:05:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 19:05:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:05:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:05:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 19:05:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:05:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:05:15,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:05:15,010 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 19:05:15,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:15 BoogieIcfgContainer [2020-12-22 19:05:15,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:05:15,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:05:15,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:05:15,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:05:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:13" (1/3) ... [2020-12-22 19:05:15,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2500a4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:15, skipping insertion in model container [2020-12-22 19:05:15,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:14" (2/3) ... [2020-12-22 19:05:15,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2500a4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:15, skipping insertion in model container [2020-12-22 19:05:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:15" (3/3) ... [2020-12-22 19:05:15,034 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-3.i [2020-12-22 19:05:15,052 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:05:15,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-22 19:05:15,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-22 19:05:15,113 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:05:15,113 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:05:15,113 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:05:15,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:05:15,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:05:15,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:05:15,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:05:15,114 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:05:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-22 19:05:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:15,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:15,143 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 19:05:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2020-12-22 19:05:15,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925605831] [2020-12-22 19:05:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,372 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 19:05:15,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925605831] [2020-12-22 19:05:15,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:15,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:15,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19773397] [2020-12-22 19:05:15,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:15,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:15,403 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-22 19:05:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,480 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:15,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,493 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:15,493 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 19:05:15,496 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 19:05:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 19:05:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 19:05:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 19:05:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-22 19:05:15,548 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2020-12-22 19:05:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,549 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-22 19:05:15,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-22 19:05:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:05:15,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:05:15,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:05:15,552 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 19:05:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2020-12-22 19:05:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528145411] [2020-12-22 19:05:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,704 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 19:05:15,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528145411] [2020-12-22 19:05:15,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:15,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:05:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993080544] [2020-12-22 19:05:15,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:05:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:05:15,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:05:15,709 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 3 states. [2020-12-22 19:05:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,735 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-22 19:05:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:15,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:05:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,737 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:05:15,737 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:05:15,738 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 19:05:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:05:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 19:05:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 19:05:15,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2020-12-22 19:05:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,746 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 19:05:15,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:05:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 19:05:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:15,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:05:15,789 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 19:05:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2020-12-22 19:05:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320476197] [2020-12-22 19:05:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:15,877 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 19:05:15,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320476197] [2020-12-22 19:05:15,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:15,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:15,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137447387] [2020-12-22 19:05:15,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:15,881 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-12-22 19:05:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:15,924 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 19:05:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:05:15,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 19:05:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:15,926 INFO L225 Difference]: With dead ends: 43 [2020-12-22 19:05:15,926 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 19:05:15,926 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 19:05:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 19:05:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 19:05:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 19:05:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-22 19:05:15,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2020-12-22 19:05:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:15,933 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-22 19:05:15,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-22 19:05:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 19:05:15,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:15,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 19:05:15,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:05:15,934 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 19:05:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2020-12-22 19:05:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201547095] [2020-12-22 19:05:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,065 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 19:05:16,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201547095] [2020-12-22 19:05:16,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:16,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:05:16,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630750125] [2020-12-22 19:05:16,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:16,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:05:16,072 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2020-12-22 19:05:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,194 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 19:05:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:16,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 19:05:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,196 INFO L225 Difference]: With dead ends: 49 [2020-12-22 19:05:16,196 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 19:05:16,196 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 19:05:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 19:05:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-12-22 19:05:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 19:05:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-22 19:05:16,202 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-12-22 19:05:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,202 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-22 19:05:16,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-22 19:05:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:05:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,203 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:16,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:05:16,204 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 19:05:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2020-12-22 19:05:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75251010] [2020-12-22 19:05:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,306 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 19:05:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75251010] [2020-12-22 19:05:16,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077656120] [2020-12-22 19:05:16,307 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 19:05:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:16,480 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:16,481 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 19:05:16,483 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:16,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:16,518 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 19:05:16,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-22 19:05:16,642 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 19:05:16,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:16,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-22 19:05:16,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967680236] [2020-12-22 19:05:16,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:05:16,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:05:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:05:16,645 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 9 states. [2020-12-22 19:05:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:16,887 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 19:05:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:16,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 19:05:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:16,889 INFO L225 Difference]: With dead ends: 57 [2020-12-22 19:05:16,889 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 19:05:16,890 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 19:05:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 19:05:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2020-12-22 19:05:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 19:05:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 19:05:16,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 9 [2020-12-22 19:05:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:16,907 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 19:05:16,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:05:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 19:05:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 19:05:16,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:16,909 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 19:05:17,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,117 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 19:05:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1472839145, now seen corresponding path program 2 times [2020-12-22 19:05:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059335452] [2020-12-22 19:05:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:17,239 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 19:05:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059335452] [2020-12-22 19:05:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696898919] [2020-12-22 19:05:17,240 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 19:05:17,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:17,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:17,318 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:17,319 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 19:05:17,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:17,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:17,330 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 19:05:17,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-12-22 19:05:17,440 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 19:05:17,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:17,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 19:05:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669635134] [2020-12-22 19:05:17,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 19:05:17,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 19:05:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:17,443 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2020-12-22 19:05:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:17,731 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-22 19:05:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:17,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-22 19:05:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:17,733 INFO L225 Difference]: With dead ends: 120 [2020-12-22 19:05:17,733 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 19:05:17,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:05:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 19:05:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 54. [2020-12-22 19:05:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 19:05:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-12-22 19:05:17,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2020-12-22 19:05:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:17,739 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-12-22 19:05:17,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 19:05:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-12-22 19:05:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:17,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:17,740 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:17,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:17,956 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 19:05:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2020-12-22 19:05:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:17,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876390161] [2020-12-22 19:05:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,002 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 19:05:18,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876390161] [2020-12-22 19:05:18,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:05:18,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:05:18,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408720731] [2020-12-22 19:05:18,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:05:18,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:05:18,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:05:18,005 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2020-12-22 19:05:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,048 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 19:05:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:05:18,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:05:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,050 INFO L225 Difference]: With dead ends: 52 [2020-12-22 19:05:18,050 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 19:05:18,050 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 19:05:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 19:05:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 19:05:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:05:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 19:05:18,054 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 20 [2020-12-22 19:05:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,055 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 19:05:18,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:05:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 19:05:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:05:18,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:05:18,056 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 19:05:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2020-12-22 19:05:18,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839651736] [2020-12-22 19:05:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,155 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 19:05:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839651736] [2020-12-22 19:05:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255667076] [2020-12-22 19:05:18,156 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 19:05:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,318 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 19:05:18,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:18,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-12-22 19:05:18,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080233741] [2020-12-22 19:05:18,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:05:18,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:05:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:18,321 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 13 states. [2020-12-22 19:05:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,419 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-22 19:05:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:05:18,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-22 19:05:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,421 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:05:18,421 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 19:05:18,422 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 19:05:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 19:05:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-12-22 19:05:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 19:05:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-22 19:05:18,426 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 20 [2020-12-22 19:05:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:18,427 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-22 19:05:18,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:05:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-22 19:05:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:05:18,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:18,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:18,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:18,642 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 19:05:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash 116531578, now seen corresponding path program 2 times [2020-12-22 19:05:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:18,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107442770] [2020-12-22 19:05:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:18,719 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 19:05:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107442770] [2020-12-22 19:05:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529688837] [2020-12-22 19:05:18,720 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 19:05:18,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:05:18,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:18,789 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:18,789 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 19:05:18,790 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:18,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:18,810 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 19:05:18,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:18,925 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 19:05:18,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:18,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-22 19:05:18,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881430857] [2020-12-22 19:05:18,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:05:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:05:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:05:18,928 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 5 states. [2020-12-22 19:05:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:18,995 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-22 19:05:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:05:18,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 19:05:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:18,998 INFO L225 Difference]: With dead ends: 40 [2020-12-22 19:05:18,998 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 19:05:18,999 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 19:05:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 19:05:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 19:05:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 19:05:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-22 19:05:19,003 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2020-12-22 19:05:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,003 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-22 19:05:19,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:05:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-22 19:05:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 19:05:19,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,004 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:19,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:19,216 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 19:05:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1258641039, now seen corresponding path program 1 times [2020-12-22 19:05:19,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510200870] [2020-12-22 19:05:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,320 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 19:05:19,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510200870] [2020-12-22 19:05:19,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028006332] [2020-12-22 19:05:19,321 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 19:05:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:05:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:19,493 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 19:05:19,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:19,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 19:05:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287922142] [2020-12-22 19:05:19,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:05:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:05:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:19,495 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2020-12-22 19:05:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:19,615 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-22 19:05:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:05:19,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-22 19:05:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:19,616 INFO L225 Difference]: With dead ends: 55 [2020-12-22 19:05:19,617 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:05:19,617 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 19:05:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:05:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-12-22 19:05:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 19:05:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 19:05:19,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-12-22 19:05:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:19,621 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 19:05:19,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:05:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 19:05:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 19:05:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:19,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:19,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:05:19,836 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 19:05:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 2 times [2020-12-22 19:05:19,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:19,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367754302] [2020-12-22 19:05:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:19,927 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 19:05:19,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367754302] [2020-12-22 19:05:19,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719044067] [2020-12-22 19:05:19,928 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 19:05:20,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:20,133 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 19:05:20,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:20,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-22 19:05:20,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076872911] [2020-12-22 19:05:20,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:05:20,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:05:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:05:20,136 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 17 states. [2020-12-22 19:05:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:20,252 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-22 19:05:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:05:20,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-22 19:05:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:20,256 INFO L225 Difference]: With dead ends: 62 [2020-12-22 19:05:20,256 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 19:05:20,257 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 19:05:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 19:05:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-12-22 19:05:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:05:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-22 19:05:20,272 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 29 [2020-12-22 19:05:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:20,273 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-22 19:05:20,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:05:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-22 19:05:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 19:05:20,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:20,276 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:20,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:20,490 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 19:05:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash 611161295, now seen corresponding path program 3 times [2020-12-22 19:05:20,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:20,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571788936] [2020-12-22 19:05:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:20,650 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 19:05:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571788936] [2020-12-22 19:05:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034512122] [2020-12-22 19:05:20,651 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 19:05:20,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 19:05:20,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 19:05:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:20,728 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-22 19:05:20,728 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 19:05:20,730 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:05:20,739 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:05:20,743 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 19:05:20,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-12-22 19:05:20,927 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 19:05:20,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:05:20,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2020-12-22 19:05:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493456719] [2020-12-22 19:05:20,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:05:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:05:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:05:20,929 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-12-22 19:05:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:21,014 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-12-22 19:05:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:05:21,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-22 19:05:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:21,015 INFO L225 Difference]: With dead ends: 51 [2020-12-22 19:05:21,016 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 19:05:21,016 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 19:05:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 19:05:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 19:05:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 19:05:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 19:05:21,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 32 [2020-12-22 19:05:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:21,020 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 19:05:21,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:05:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 19:05:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 19:05:21,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:21,022 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:21,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:21,234 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 19:05:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1296192761, now seen corresponding path program 1 times [2020-12-22 19:05:21,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:21,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235725470] [2020-12-22 19:05:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,382 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 19:05:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235725470] [2020-12-22 19:05:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915787204] [2020-12-22 19:05:21,383 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 19:05:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 19:05:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:21,638 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 19:05:21,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:21,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-22 19:05:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514861780] [2020-12-22 19:05:21,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 19:05:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 19:05:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:05:21,641 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-22 19:05:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:21,763 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-22 19:05:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:05:21,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-12-22 19:05:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:21,764 INFO L225 Difference]: With dead ends: 61 [2020-12-22 19:05:21,764 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 19:05:21,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 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 19:05:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 19:05:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-22 19:05:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 19:05:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-22 19:05:21,768 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 50 [2020-12-22 19:05:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:21,768 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-22 19:05:21,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 19:05:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-22 19:05:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 19:05:21,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:21,770 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:21,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 19:05:21,985 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 19:05:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1280603486, now seen corresponding path program 2 times [2020-12-22 19:05:21,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:21,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089968199] [2020-12-22 19:05:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:22,108 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 19:05:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089968199] [2020-12-22 19:05:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484468984] [2020-12-22 19:05:22,109 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 19:05:22,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:22,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:05:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:22,350 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 19:05:22,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:22,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-22 19:05:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069477334] [2020-12-22 19:05:22,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:05:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:05:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:05:22,353 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-12-22 19:05:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:22,513 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-22 19:05:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:22,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-12-22 19:05:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:22,515 INFO L225 Difference]: With dead ends: 67 [2020-12-22 19:05:22,515 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 19:05:22,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 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 19:05:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 19:05:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-22 19:05:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 19:05:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-22 19:05:22,520 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2020-12-22 19:05:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:22,520 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-22 19:05:22,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:05:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-22 19:05:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 19:05:22,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:22,525 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:22,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:22,741 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 19:05:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash -550292647, now seen corresponding path program 3 times [2020-12-22 19:05:22,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:22,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412666457] [2020-12-22 19:05:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:22,854 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 19:05:22,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412666457] [2020-12-22 19:05:22,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524297796] [2020-12-22 19:05:22,855 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 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 19:05:23,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 19:05:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:05:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:23,225 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 19:05:23,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:23,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 19:05:23,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903131783] [2020-12-22 19:05:23,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:05:23,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:05:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:23,234 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 13 states. [2020-12-22 19:05:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:23,333 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-22 19:05:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:05:23,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-12-22 19:05:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:23,334 INFO L225 Difference]: With dead ends: 74 [2020-12-22 19:05:23,334 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:05:23,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:05:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:05:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-22 19:05:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 19:05:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-22 19:05:23,337 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2020-12-22 19:05:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:23,338 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-22 19:05:23,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:05:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-22 19:05:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:05:23,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:23,339 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:23,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 19:05:23,553 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 19:05:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash 123506724, now seen corresponding path program 4 times [2020-12-22 19:05:23,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:23,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507614664] [2020-12-22 19:05:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 19:05:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507614664] [2020-12-22 19:05:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008063038] [2020-12-22 19:05:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:24,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:05:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 19:05:24,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:24,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 19:05:24,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447940911] [2020-12-22 19:05:24,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:05:24,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:05:24,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:05:24,647 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-12-22 19:05:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:24,859 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-12-22 19:05:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:24,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-12-22 19:05:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:24,861 INFO L225 Difference]: With dead ends: 79 [2020-12-22 19:05:24,861 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 19:05:24,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=392, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:05:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 19:05:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-12-22 19:05:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:05:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-22 19:05:24,864 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 65 [2020-12-22 19:05:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:24,865 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-22 19:05:24,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:05:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-22 19:05:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:05:24,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:24,866 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:25,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:05:25,081 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 19:05:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1834510777, now seen corresponding path program 5 times [2020-12-22 19:05:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:25,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136778076] [2020-12-22 19:05:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:25,226 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 19:05:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136778076] [2020-12-22 19:05:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223256711] [2020-12-22 19:05:25,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:27,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 19:05:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 19:05:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:28,116 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 19:05:28,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:28,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 19:05:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184608162] [2020-12-22 19:05:28,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:05:28,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:28,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:05:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:28,118 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 15 states. [2020-12-22 19:05:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:28,246 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-12-22 19:05:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:05:28,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-12-22 19:05:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:28,248 INFO L225 Difference]: With dead ends: 86 [2020-12-22 19:05:28,248 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 19:05:28,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:05:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 19:05:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-12-22 19:05:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 19:05:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-22 19:05:28,251 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2020-12-22 19:05:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:28,251 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-22 19:05:28,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:05:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-22 19:05:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:05:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:28,253 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:28,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:05:28,467 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 19:05:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1546699324, now seen corresponding path program 6 times [2020-12-22 19:05:28,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:28,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210694600] [2020-12-22 19:05:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 19:05:28,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210694600] [2020-12-22 19:05:28,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599795346] [2020-12-22 19:05:28,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:29,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 19:05:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 19:05:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 19:05:29,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:29,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-22 19:05:29,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083436196] [2020-12-22 19:05:29,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:05:29,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:05:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=458, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:05:29,443 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-12-22 19:05:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:29,727 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-22 19:05:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:05:29,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-12-22 19:05:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:29,729 INFO L225 Difference]: With dead ends: 91 [2020-12-22 19:05:29,729 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 19:05:29,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=343, Invalid=527, Unknown=0, NotChecked=0, Total=870 [2020-12-22 19:05:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 19:05:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-22 19:05:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:05:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-22 19:05:29,733 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 77 [2020-12-22 19:05:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:29,734 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-22 19:05:29,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:05:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-22 19:05:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 19:05:29,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:29,736 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:29,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:05:29,951 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 19:05:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash 790624281, now seen corresponding path program 7 times [2020-12-22 19:05:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:29,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272201846] [2020-12-22 19:05:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:05:30,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272201846] [2020-12-22 19:05:30,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392503750] [2020-12-22 19:05:30,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 19:05:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 19:05:30,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:30,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-22 19:05:30,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337391968] [2020-12-22 19:05:30,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 19:05:30,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 19:05:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=571, Unknown=0, NotChecked=0, Total=930 [2020-12-22 19:05:30,522 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 31 states. [2020-12-22 19:05:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:30,739 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-12-22 19:05:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:05:30,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 86 [2020-12-22 19:05:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:30,740 INFO L225 Difference]: With dead ends: 97 [2020-12-22 19:05:30,741 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 19:05:30,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=390, Invalid=602, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:05:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 19:05:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-12-22 19:05:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:05:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-12-22 19:05:30,744 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 86 [2020-12-22 19:05:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:30,744 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-12-22 19:05:30,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 19:05:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-12-22 19:05:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 19:05:30,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:30,745 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:30,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:30,959 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 19:05:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1522820802, now seen corresponding path program 8 times [2020-12-22 19:05:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:30,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800787386] [2020-12-22 19:05:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:31,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800787386] [2020-12-22 19:05:31,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075785353] [2020-12-22 19:05:31,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:31,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:05:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 19:05:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:31,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:31,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2020-12-22 19:05:31,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129075828] [2020-12-22 19:05:31,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:05:31,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:05:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=649, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:05:31,548 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 33 states. [2020-12-22 19:05:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:31,814 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-12-22 19:05:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 19:05:31,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2020-12-22 19:05:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:31,815 INFO L225 Difference]: With dead ends: 103 [2020-12-22 19:05:31,815 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 19:05:31,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=682, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:05:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 19:05:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-12-22 19:05:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 19:05:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-22 19:05:31,820 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 92 [2020-12-22 19:05:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:31,820 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-22 19:05:31,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:05:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-22 19:05:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 19:05:31,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:31,822 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:32,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:32,037 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 19:05:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -109584775, now seen corresponding path program 9 times [2020-12-22 19:05:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217725665] [2020-12-22 19:05:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:32,232 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 19:05:32,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217725665] [2020-12-22 19:05:32,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780708275] [2020-12-22 19:05:32,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:33,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 19:05:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:05:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 43 proven. 330 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 19:05:33,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:33,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 22 [2020-12-22 19:05:33,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131020854] [2020-12-22 19:05:33,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:05:33,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:05:33,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:05:33,991 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 22 states. [2020-12-22 19:05:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:34,504 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-12-22 19:05:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:34,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 19:05:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:34,505 INFO L225 Difference]: With dead ends: 113 [2020-12-22 19:05:34,506 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 19:05:34,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 19:05:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-12-22 19:05:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 19:05:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-22 19:05:34,510 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-12-22 19:05:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:34,510 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-22 19:05:34,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:05:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-22 19:05:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 19:05:34,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:34,512 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:34,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:34,726 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 19:05:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -54334780, now seen corresponding path program 10 times [2020-12-22 19:05:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:34,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672465012] [2020-12-22 19:05:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 19:05:34,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672465012] [2020-12-22 19:05:34,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122088059] [2020-12-22 19:05:34,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:05:45,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:05:45,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:05:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:05:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:05:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 19:05:45,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:05:45,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2020-12-22 19:05:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237301267] [2020-12-22 19:05:45,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:05:45,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:05:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:05:45,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:05:45,586 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 38 states. [2020-12-22 19:05:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:05:45,859 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2020-12-22 19:05:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:05:45,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-12-22 19:05:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:05:45,863 INFO L225 Difference]: With dead ends: 121 [2020-12-22 19:05:45,863 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 19:05:45,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:05:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 19:05:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-12-22 19:05:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 19:05:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-12-22 19:05:45,867 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-12-22 19:05:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:05:45,867 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-12-22 19:05:45,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:05:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-12-22 19:05:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 19:05:45,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:05:45,869 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:05:46,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:05:46,076 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 19:05:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:05:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash -517681538, now seen corresponding path program 11 times [2020-12-22 19:05:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:05:46,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119119628] [2020-12-22 19:05:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:05:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:05:46,352 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 19:05:46,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119119628] [2020-12-22 19:05:46,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218216985] [2020-12-22 19:05:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:06:32,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 19:06:32,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:06:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:06:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:06:32,320 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 19:06:32,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:06:32,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 19:06:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836407900] [2020-12-22 19:06:32,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:06:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:06:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:06:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:32,323 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 22 states. [2020-12-22 19:06:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:06:32,527 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-22 19:06:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:06:32,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2020-12-22 19:06:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:06:32,530 INFO L225 Difference]: With dead ends: 128 [2020-12-22 19:06:32,530 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 19:06:32,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:06:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 19:06:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-12-22 19:06:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 19:06:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-22 19:06:32,534 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2020-12-22 19:06:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:06:32,534 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-22 19:06:32,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:06:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-22 19:06:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 19:06:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:06:32,536 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:06:32,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:06:32,750 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 19:06:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:06:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 978446047, now seen corresponding path program 12 times [2020-12-22 19:06:32,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:06:32,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079272926] [2020-12-22 19:06:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:06:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:06:33,037 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 19:06:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079272926] [2020-12-22 19:06:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761246789] [2020-12-22 19:06:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:00,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 19:07:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:07:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:00,310 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 19:07:00,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:00,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 19:07:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593442470] [2020-12-22 19:07:00,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:07:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:07:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:07:00,312 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 23 states. [2020-12-22 19:07:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:00,530 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-12-22 19:07:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:07:00,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-12-22 19:07:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:00,532 INFO L225 Difference]: With dead ends: 135 [2020-12-22 19:07:00,532 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 19:07:00,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 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 19:07:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 19:07:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-12-22 19:07:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 19:07:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-12-22 19:07:00,536 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2020-12-22 19:07:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:00,536 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-12-22 19:07:00,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:07:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-12-22 19:07:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 19:07:00,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:00,537 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:00,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:07:00,738 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 19:07:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1055267106, now seen corresponding path program 13 times [2020-12-22 19:07:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072253120] [2020-12-22 19:07:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:01,037 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 19:07:01,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072253120] [2020-12-22 19:07:01,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271395638] [2020-12-22 19:07:01,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:07:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:01,622 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 19:07:01,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:01,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2020-12-22 19:07:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13285815] [2020-12-22 19:07:01,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 19:07:01,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 19:07:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 19:07:01,628 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 43 states. [2020-12-22 19:07:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:01,974 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2020-12-22 19:07:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:07:01,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 122 [2020-12-22 19:07:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:01,975 INFO L225 Difference]: With dead ends: 139 [2020-12-22 19:07:01,976 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 19:07:01,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=803, Invalid=1267, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:07:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 19:07:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2020-12-22 19:07:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 19:07:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-12-22 19:07:01,981 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 122 [2020-12-22 19:07:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:01,981 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-12-22 19:07:01,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 19:07:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-12-22 19:07:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 19:07:01,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:01,982 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:07:02,196 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 19:07:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2007867801, now seen corresponding path program 14 times [2020-12-22 19:07:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983796098] [2020-12-22 19:07:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:02,551 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 19:07:02,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983796098] [2020-12-22 19:07:02,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145915677] [2020-12-22 19:07:02,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:02,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:07:02,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 19:07:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:03,182 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 19:07:03,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:03,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2020-12-22 19:07:03,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648943588] [2020-12-22 19:07:03,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 19:07:03,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 19:07:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 19:07:03,184 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 47 states. [2020-12-22 19:07:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:03,581 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-12-22 19:07:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:07:03,582 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2020-12-22 19:07:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:03,583 INFO L225 Difference]: With dead ends: 145 [2020-12-22 19:07:03,583 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 19:07:03,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=874, Invalid=1382, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:07:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 19:07:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-12-22 19:07:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 19:07:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-12-22 19:07:03,588 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 134 [2020-12-22 19:07:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:03,588 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-12-22 19:07:03,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 19:07:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-12-22 19:07:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 19:07:03,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:03,589 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:03,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:07:03,794 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 19:07:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash -875912258, now seen corresponding path program 15 times [2020-12-22 19:07:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:03,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380375299] [2020-12-22 19:07:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:04,143 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 19:07:04,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380375299] [2020-12-22 19:07:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207382765] [2020-12-22 19:07:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:30,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-22 19:07:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:07:30,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:07:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:07:31,074 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 19:07:31,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:07:31,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2020-12-22 19:07:31,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321835222] [2020-12-22 19:07:31,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 19:07:31,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:07:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 19:07:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=1453, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 19:07:31,078 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 49 states. [2020-12-22 19:07:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:07:31,408 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2020-12-22 19:07:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:07:31,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2020-12-22 19:07:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:07:31,409 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:07:31,409 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 19:07:31,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=948, Invalid=1502, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:07:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 19:07:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-22 19:07:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 19:07:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-12-22 19:07:31,414 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 140 [2020-12-22 19:07:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:07:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-12-22 19:07:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 19:07:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-12-22 19:07:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 19:07:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:07:31,416 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:07:31,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:07:31,619 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 19:07:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:07:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1550653447, now seen corresponding path program 16 times [2020-12-22 19:07:31,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:07:31,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079868408] [2020-12-22 19:07:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:07:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:07:32,024 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 19:07:32,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079868408] [2020-12-22 19:07:32,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028283051] [2020-12-22 19:07:32,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:08:28,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:08:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:08:28,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 19:08:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:08:29,254 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 19:08:29,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:08:29,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2020-12-22 19:08:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964125277] [2020-12-22 19:08:29,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 19:08:29,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:08:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 19:08:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1576, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 19:08:29,257 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 51 states. [2020-12-22 19:08:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:08:29,679 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2020-12-22 19:08:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:08:29,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 146 [2020-12-22 19:08:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:08:29,681 INFO L225 Difference]: With dead ends: 157 [2020-12-22 19:08:29,681 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 19:08:29,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1025, Invalid=1627, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 19:08:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 19:08:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-12-22 19:08:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 19:08:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-12-22 19:08:29,686 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 146 [2020-12-22 19:08:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:08:29,686 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-12-22 19:08:29,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 19:08:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-12-22 19:08:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 19:08:29,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:08:29,687 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:08:29,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 19:08:29,903 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 19:08:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:08:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash -765375906, now seen corresponding path program 17 times [2020-12-22 19:08:29,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:08:29,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865965719] [2020-12-22 19:08:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:08:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:08:30,319 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 19:08:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865965719] [2020-12-22 19:08:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955504135] [2020-12-22 19:08:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true