/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 21:58:22,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:58:22,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:58:22,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:58:22,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:58:22,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:58:22,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:58:22,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:58:22,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:58:22,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:58:22,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:58:22,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:58:22,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:58:22,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:58:22,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:58:22,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:58:22,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:58:22,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:58:22,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:58:22,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:58:22,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:58:22,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:58:22,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:58:22,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:58:22,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 21:58:22,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:58:22,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:58:22,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:58:22,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 21:58:22,988 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:58:22,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:58:22,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:58:22,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:58:22,991 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:58:22,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:58:22,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:58:22,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:58:22,992 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:58:22,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:58:22,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:58:22,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:58:22,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:58:22,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:58:22,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:58:22,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:58:22,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:58:22,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:58:22,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:58:22,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:58:22,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:58:22,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:58:22,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:58:22,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:58:22,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:58:23,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:58:23,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:58:23,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:58:23,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:58:23,418 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:58:23,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-11-06 21:58:23,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b6ddf61/2a2377a544a94736ae9a50350de99999/FLAGb18bd97ae [2020-11-06 21:58:24,293 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:58:24,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-11-06 21:58:24,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b6ddf61/2a2377a544a94736ae9a50350de99999/FLAGb18bd97ae [2020-11-06 21:58:24,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b6ddf61/2a2377a544a94736ae9a50350de99999 [2020-11-06 21:58:24,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:58:24,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:58:24,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:24,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:58:24,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:58:24,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:24" (1/1) ... [2020-11-06 21:58:24,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eca4553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:24, skipping insertion in model container [2020-11-06 21:58:24,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:24" (1/1) ... [2020-11-06 21:58:24,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:58:24,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:58:24,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:24,939 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:58:24,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:25,014 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:58:25,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25 WrapperNode [2020-11-06 21:58:25,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:25,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:58:25,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:58:25,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:58:25,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (1/1) ... [2020-11-06 21:58:25,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:58:25,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:58:25,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:58:25,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:58:25,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (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 [2020-11-06 21:58:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:58:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:58:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:58:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 21:58:25,153 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-11-06 21:58:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-11-06 21:58:25,154 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-11-06 21:58:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:58:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:58:25,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:58:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:58:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:58:25,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 21:58:25,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 21:58:25,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 21:58:25,160 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-11-06 21:58:25,161 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-11-06 21:58:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-11-06 21:58:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:58:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:58:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:58:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:58:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:58:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:58:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:58:26,015 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:58:26,015 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 21:58:26,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26 BoogieIcfgContainer [2020-11-06 21:58:26,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:58:26,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:58:26,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:58:26,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:58:26,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:24" (1/3) ... [2020-11-06 21:58:26,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23536279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2020-11-06 21:58:26,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:25" (2/3) ... [2020-11-06 21:58:26,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23536279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:26, skipping insertion in model container [2020-11-06 21:58:26,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:26" (3/3) ... [2020-11-06 21:58:26,027 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-11-06 21:58:26,045 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:58:26,050 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:58:26,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:58:26,096 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:58:26,096 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:58:26,096 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:58:26,097 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:58:26,097 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:58:26,097 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:58:26,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:58:26,097 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:58:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-11-06 21:58:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 21:58:26,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:26,129 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:26,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1471639594, now seen corresponding path program 1 times [2020-11-06 21:58:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:26,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621393446] [2020-11-06 21:58:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-06 21:58:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-06 21:58:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621393446] [2020-11-06 21:58:26,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:26,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 21:58:26,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145035931] [2020-11-06 21:58:26,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 21:58:26,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 21:58:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 21:58:26,589 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-11-06 21:58:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:27,719 INFO L93 Difference]: Finished difference Result 124 states and 181 transitions. [2020-11-06 21:58:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 21:58:27,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-11-06 21:58:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:27,733 INFO L225 Difference]: With dead ends: 124 [2020-11-06 21:58:27,733 INFO L226 Difference]: Without dead ends: 54 [2020-11-06 21:58:27,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 21:58:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-06 21:58:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-06 21:58:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 21:58:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-06 21:58:27,796 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 50 [2020-11-06 21:58:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:27,798 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-06 21:58:27,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 21:58:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-11-06 21:58:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 21:58:27,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:27,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:27,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:58:27,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -32852944, now seen corresponding path program 1 times [2020-11-06 21:58:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:27,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160542958] [2020-11-06 21:58:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 21:58:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-06 21:58:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160542958] [2020-11-06 21:58:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:28,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 21:58:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097011317] [2020-11-06 21:58:28,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 21:58:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 21:58:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 21:58:28,089 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 5 states. [2020-11-06 21:58:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:28,428 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-11-06 21:58:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 21:58:28,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-11-06 21:58:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:28,431 INFO L225 Difference]: With dead ends: 67 [2020-11-06 21:58:28,431 INFO L226 Difference]: Without dead ends: 54 [2020-11-06 21:58:28,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 21:58:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-06 21:58:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-06 21:58:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 21:58:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2020-11-06 21:58:28,444 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 52 [2020-11-06 21:58:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:28,445 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2020-11-06 21:58:28,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 21:58:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2020-11-06 21:58:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 21:58:28,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:28,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:28,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 21:58:28,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1621200846, now seen corresponding path program 1 times [2020-11-06 21:58:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:28,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34313982] [2020-11-06 21:58:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 21:58:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:28,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34313982] [2020-11-06 21:58:28,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150327433] [2020-11-06 21:58:28,595 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 [2020-11-06 21:58:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 21:58:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 21:58:28,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:28,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2020-11-06 21:58:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702462926] [2020-11-06 21:58:28,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 21:58:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 21:58:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:58:28,851 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 8 states. [2020-11-06 21:58:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:28,999 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-11-06 21:58:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:58:29,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-11-06 21:58:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:29,003 INFO L225 Difference]: With dead ends: 92 [2020-11-06 21:58:29,004 INFO L226 Difference]: Without dead ends: 81 [2020-11-06 21:58:29,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:58:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-06 21:58:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-11-06 21:58:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-06 21:58:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2020-11-06 21:58:29,023 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 52 [2020-11-06 21:58:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:29,023 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2020-11-06 21:58:29,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 21:58:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2020-11-06 21:58:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 21:58:29,026 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:29,026 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:29,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 21:58:29,240 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2086960436, now seen corresponding path program 1 times [2020-11-06 21:58:29,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:29,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335328726] [2020-11-06 21:58:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-11-06 21:58:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 21:58:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:29,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335328726] [2020-11-06 21:58:29,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387168705] [2020-11-06 21:58:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 21:58:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 21:58:29,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:29,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-11-06 21:58:29,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026246810] [2020-11-06 21:58:29,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 21:58:29,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 21:58:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-06 21:58:29,616 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 10 states. [2020-11-06 21:58:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:32,279 INFO L93 Difference]: Finished difference Result 171 states and 239 transitions. [2020-11-06 21:58:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 21:58:32,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-11-06 21:58:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:32,283 INFO L225 Difference]: With dead ends: 171 [2020-11-06 21:58:32,283 INFO L226 Difference]: Without dead ends: 114 [2020-11-06 21:58:32,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-06 21:58:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-06 21:58:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-11-06 21:58:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-06 21:58:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-11-06 21:58:32,331 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 52 [2020-11-06 21:58:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:32,332 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-11-06 21:58:32,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 21:58:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-11-06 21:58:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 21:58:32,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:32,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:32,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:32,550 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2109457551, now seen corresponding path program 1 times [2020-11-06 21:58:32,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:32,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843317788] [2020-11-06 21:58:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 21:58:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-06 21:58:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 21:58:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843317788] [2020-11-06 21:58:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586293709] [2020-11-06 21:58:32,674 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 [2020-11-06 21:58:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 21:58:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:32,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:32,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-06 21:58:32,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36256460] [2020-11-06 21:58:32,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 21:58:32,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 21:58:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 21:58:32,796 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 4 states. [2020-11-06 21:58:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:32,874 INFO L93 Difference]: Finished difference Result 192 states and 261 transitions. [2020-11-06 21:58:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 21:58:32,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-11-06 21:58:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:32,880 INFO L225 Difference]: With dead ends: 192 [2020-11-06 21:58:32,880 INFO L226 Difference]: Without dead ends: 108 [2020-11-06 21:58:32,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-06 21:58:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-06 21:58:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-11-06 21:58:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-06 21:58:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2020-11-06 21:58:32,906 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 57 [2020-11-06 21:58:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:32,907 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2020-11-06 21:58:32,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 21:58:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2020-11-06 21:58:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-06 21:58:32,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:32,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:33,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:33,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -136006542, now seen corresponding path program 1 times [2020-11-06 21:58:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:33,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905387913] [2020-11-06 21:58:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 21:58:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-06 21:58:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:58:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-06 21:58:33,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905387913] [2020-11-06 21:58:33,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:33,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 21:58:33,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386535590] [2020-11-06 21:58:33,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 21:58:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 21:58:33,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 21:58:33,294 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand 7 states. [2020-11-06 21:58:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:35,440 INFO L93 Difference]: Finished difference Result 112 states and 149 transitions. [2020-11-06 21:58:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 21:58:35,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-11-06 21:58:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:35,443 INFO L225 Difference]: With dead ends: 112 [2020-11-06 21:58:35,444 INFO L226 Difference]: Without dead ends: 105 [2020-11-06 21:58:35,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:58:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-06 21:58:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-11-06 21:58:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-06 21:58:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2020-11-06 21:58:35,469 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 59 [2020-11-06 21:58:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:35,470 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2020-11-06 21:58:35,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 21:58:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2020-11-06 21:58:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-06 21:58:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:35,474 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:35,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 21:58:35,475 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1911013904, now seen corresponding path program 1 times [2020-11-06 21:58:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:35,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365493225] [2020-11-06 21:58:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 21:58:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-06 21:58:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:58:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:35,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365493225] [2020-11-06 21:58:35,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715552510] [2020-11-06 21:58:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 21:58:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:35,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:35,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-06 21:58:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426790644] [2020-11-06 21:58:35,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 21:58:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 21:58:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:58:35,796 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand 5 states. [2020-11-06 21:58:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:35,997 INFO L93 Difference]: Finished difference Result 218 states and 301 transitions. [2020-11-06 21:58:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 21:58:35,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-11-06 21:58:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:36,000 INFO L225 Difference]: With dead ends: 218 [2020-11-06 21:58:36,002 INFO L226 Difference]: Without dead ends: 128 [2020-11-06 21:58:36,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 21:58:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-06 21:58:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2020-11-06 21:58:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-06 21:58:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2020-11-06 21:58:36,056 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 59 [2020-11-06 21:58:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:36,056 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2020-11-06 21:58:36,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 21:58:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2020-11-06 21:58:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-06 21:58:36,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:36,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:36,279 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -606085056, now seen corresponding path program 1 times [2020-11-06 21:58:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:36,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233928848] [2020-11-06 21:58:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-06 21:58:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-06 21:58:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 21:58:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233928848] [2020-11-06 21:58:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215340517] [2020-11-06 21:58:36,472 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 [2020-11-06 21:58:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:36,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 21:58:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:36,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:36,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 21:58:36,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001063263] [2020-11-06 21:58:36,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:58:36,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:58:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:58:36,603 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand 9 states. [2020-11-06 21:58:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:37,244 INFO L93 Difference]: Finished difference Result 222 states and 309 transitions. [2020-11-06 21:58:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:58:37,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-11-06 21:58:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:37,247 INFO L225 Difference]: With dead ends: 222 [2020-11-06 21:58:37,247 INFO L226 Difference]: Without dead ends: 128 [2020-11-06 21:58:37,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:58:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-06 21:58:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2020-11-06 21:58:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-06 21:58:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 161 transitions. [2020-11-06 21:58:37,272 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 161 transitions. Word has length 60 [2020-11-06 21:58:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:37,272 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 161 transitions. [2020-11-06 21:58:37,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:58:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 161 transitions. [2020-11-06 21:58:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-06 21:58:37,275 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:37,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:37,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:37,491 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash 401000705, now seen corresponding path program 1 times [2020-11-06 21:58:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:37,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981031810] [2020-11-06 21:58:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-06 21:58:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-06 21:58:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-11-06 21:58:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981031810] [2020-11-06 21:58:37,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251888057] [2020-11-06 21:58:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 21:58:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 21:58:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:37,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-06 21:58:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064256417] [2020-11-06 21:58:37,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 21:58:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 21:58:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:58:37,928 INFO L87 Difference]: Start difference. First operand 118 states and 161 transitions. Second operand 11 states. [2020-11-06 21:58:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:41,145 INFO L93 Difference]: Finished difference Result 241 states and 335 transitions. [2020-11-06 21:58:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 21:58:41,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-11-06 21:58:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:41,148 INFO L225 Difference]: With dead ends: 241 [2020-11-06 21:58:41,148 INFO L226 Difference]: Without dead ends: 141 [2020-11-06 21:58:41,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-11-06 21:58:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-06 21:58:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2020-11-06 21:58:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-06 21:58:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 164 transitions. [2020-11-06 21:58:41,180 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 164 transitions. Word has length 62 [2020-11-06 21:58:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:41,180 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 164 transitions. [2020-11-06 21:58:41,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 21:58:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 164 transitions. [2020-11-06 21:58:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 21:58:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:41,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:41,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:41,384 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:41,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1948076209, now seen corresponding path program 2 times [2020-11-06 21:58:41,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:41,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196337027] [2020-11-06 21:58:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:58:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:58:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-06 21:58:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:41,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196337027] [2020-11-06 21:58:41,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748256710] [2020-11-06 21:58:41,512 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 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 [2020-11-06 21:58:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 21:58:41,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:58:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 21:58:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-06 21:58:41,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:58:41,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-11-06 21:58:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769208129] [2020-11-06 21:58:41,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 21:58:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 21:58:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:58:41,638 INFO L87 Difference]: Start difference. First operand 120 states and 164 transitions. Second operand 6 states. [2020-11-06 21:58:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:41,723 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2020-11-06 21:58:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 21:58:41,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-11-06 21:58:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:41,727 INFO L225 Difference]: With dead ends: 138 [2020-11-06 21:58:41,727 INFO L226 Difference]: Without dead ends: 122 [2020-11-06 21:58:41,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-06 21:58:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-06 21:58:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-11-06 21:58:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-06 21:58:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2020-11-06 21:58:41,755 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 63 [2020-11-06 21:58:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:41,756 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2020-11-06 21:58:41,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 21:58:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2020-11-06 21:58:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-06 21:58:41,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:41,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:41,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 21:58:41,973 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1904706916, now seen corresponding path program 1 times [2020-11-06 21:58:41,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369158252] [2020-11-06 21:58:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:58:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 21:58:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 21:58:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:42,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369158252] [2020-11-06 21:58:42,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768621578] [2020-11-06 21:58:42,182 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 [2020-11-06 21:58:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:42,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 21:58:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:42,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:42,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-06 21:58:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466489616] [2020-11-06 21:58:42,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 21:58:42,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 21:58:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-06 21:58:42,348 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand 11 states. [2020-11-06 21:58:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:43,432 INFO L93 Difference]: Finished difference Result 243 states and 327 transitions. [2020-11-06 21:58:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 21:58:43,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-11-06 21:58:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:43,438 INFO L225 Difference]: With dead ends: 243 [2020-11-06 21:58:43,438 INFO L226 Difference]: Without dead ends: 142 [2020-11-06 21:58:43,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:58:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-06 21:58:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-11-06 21:58:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-06 21:58:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2020-11-06 21:58:43,471 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 65 [2020-11-06 21:58:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:43,471 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2020-11-06 21:58:43,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 21:58:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2020-11-06 21:58:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-06 21:58:43,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:43,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:43,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 21:58:43,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1033852379, now seen corresponding path program 1 times [2020-11-06 21:58:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:43,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282178932] [2020-11-06 21:58:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-06 21:58:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:58:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-11-06 21:58:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282178932] [2020-11-06 21:58:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530273955] [2020-11-06 21:58:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 21:58:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:44,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-06 21:58:44,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898008317] [2020-11-06 21:58:44,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 21:58:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 21:58:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:58:44,102 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand 13 states. [2020-11-06 21:58:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:46,719 INFO L93 Difference]: Finished difference Result 256 states and 343 transitions. [2020-11-06 21:58:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 21:58:46,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-11-06 21:58:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:46,721 INFO L225 Difference]: With dead ends: 256 [2020-11-06 21:58:46,721 INFO L226 Difference]: Without dead ends: 152 [2020-11-06 21:58:46,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-11-06 21:58:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-06 21:58:46,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2020-11-06 21:58:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-06 21:58:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 168 transitions. [2020-11-06 21:58:46,746 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 168 transitions. Word has length 67 [2020-11-06 21:58:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:46,747 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 168 transitions. [2020-11-06 21:58:46,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 21:58:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 168 transitions. [2020-11-06 21:58:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-06 21:58:46,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:46,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:46,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:46,966 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:46,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1850458037, now seen corresponding path program 2 times [2020-11-06 21:58:46,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:46,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757692480] [2020-11-06 21:58:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-06 21:58:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 21:58:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-06 21:58:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:47,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757692480] [2020-11-06 21:58:47,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459664048] [2020-11-06 21:58:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:58:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:58:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 21:58:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:47,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:47,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-06 21:58:47,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870077365] [2020-11-06 21:58:47,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 21:58:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 21:58:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:58:47,305 INFO L87 Difference]: Start difference. First operand 127 states and 168 transitions. Second operand 13 states. [2020-11-06 21:58:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:48,371 INFO L93 Difference]: Finished difference Result 259 states and 350 transitions. [2020-11-06 21:58:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 21:58:48,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-11-06 21:58:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:48,374 INFO L225 Difference]: With dead ends: 259 [2020-11-06 21:58:48,374 INFO L226 Difference]: Without dead ends: 155 [2020-11-06 21:58:48,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2020-11-06 21:58:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-06 21:58:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-11-06 21:58:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-06 21:58:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2020-11-06 21:58:48,391 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 68 [2020-11-06 21:58:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:48,391 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2020-11-06 21:58:48,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 21:58:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2020-11-06 21:58:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-06 21:58:48,393 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:48,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:48,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:48,608 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1627417546, now seen corresponding path program 2 times [2020-11-06 21:58:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:48,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785601310] [2020-11-06 21:58:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-06 21:58:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-11-06 21:58:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-06 21:58:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:48,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785601310] [2020-11-06 21:58:48,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218766072] [2020-11-06 21:58:48,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:48,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:58:48,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:58:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 21:58:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:49,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:49,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-11-06 21:58:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001078184] [2020-11-06 21:58:49,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 21:58:49,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 21:58:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-06 21:58:49,077 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand 15 states. [2020-11-06 21:58:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:50,523 INFO L93 Difference]: Finished difference Result 269 states and 361 transitions. [2020-11-06 21:58:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 21:58:50,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-11-06 21:58:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:50,526 INFO L225 Difference]: With dead ends: 269 [2020-11-06 21:58:50,526 INFO L226 Difference]: Without dead ends: 162 [2020-11-06 21:58:50,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-11-06 21:58:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-06 21:58:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 133. [2020-11-06 21:58:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-06 21:58:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 176 transitions. [2020-11-06 21:58:50,544 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 176 transitions. Word has length 70 [2020-11-06 21:58:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:50,544 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 176 transitions. [2020-11-06 21:58:50,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 21:58:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 176 transitions. [2020-11-06 21:58:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-06 21:58:50,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:50,546 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:50,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 21:58:50,760 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 629807044, now seen corresponding path program 3 times [2020-11-06 21:58:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:50,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856476348] [2020-11-06 21:58:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-11-06 21:58:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-06 21:58:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-06 21:58:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856476348] [2020-11-06 21:58:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120791793] [2020-11-06 21:58:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:58:50,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 21:58:50,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:58:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 21:58:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-06 21:58:51,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:51,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-11-06 21:58:51,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476536454] [2020-11-06 21:58:51,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 21:58:51,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:51,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 21:58:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-06 21:58:51,068 INFO L87 Difference]: Start difference. First operand 133 states and 176 transitions. Second operand 13 states. [2020-11-06 21:58:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:54,926 INFO L93 Difference]: Finished difference Result 307 states and 446 transitions. [2020-11-06 21:58:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 21:58:54,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-11-06 21:58:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:54,929 INFO L225 Difference]: With dead ends: 307 [2020-11-06 21:58:54,929 INFO L226 Difference]: Without dead ends: 192 [2020-11-06 21:58:54,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-11-06 21:58:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-06 21:58:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 144. [2020-11-06 21:58:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-06 21:58:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 196 transitions. [2020-11-06 21:58:54,955 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 196 transitions. Word has length 71 [2020-11-06 21:58:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:54,955 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 196 transitions. [2020-11-06 21:58:54,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 21:58:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 196 transitions. [2020-11-06 21:58:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-06 21:58:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:54,958 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:55,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-06 21:58:55,172 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1418553148, now seen corresponding path program 1 times [2020-11-06 21:58:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:55,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022969662] [2020-11-06 21:58:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 21:58:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-06 21:58:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-06 21:58:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:55,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022969662] [2020-11-06 21:58:55,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541622148] [2020-11-06 21:58:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 21:58:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 21:58:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:55,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:55,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-11-06 21:58:55,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66646853] [2020-11-06 21:58:55,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 21:58:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 21:58:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-06 21:58:55,658 INFO L87 Difference]: Start difference. First operand 144 states and 196 transitions. Second operand 17 states. [2020-11-06 21:58:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:57,901 INFO L93 Difference]: Finished difference Result 291 states and 411 transitions. [2020-11-06 21:58:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 21:58:57,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-06 21:58:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:57,905 INFO L225 Difference]: With dead ends: 291 [2020-11-06 21:58:57,905 INFO L226 Difference]: Without dead ends: 179 [2020-11-06 21:58:57,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2020-11-06 21:58:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-06 21:58:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 146. [2020-11-06 21:58:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-06 21:58:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2020-11-06 21:58:57,925 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 76 [2020-11-06 21:58:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:57,925 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2020-11-06 21:58:57,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 21:58:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2020-11-06 21:58:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-06 21:58:57,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:57,927 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:58,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-06 21:58:58,141 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1332148116, now seen corresponding path program 1 times [2020-11-06 21:58:58,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305624883] [2020-11-06 21:58:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:58:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 21:58:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-11-06 21:58:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 21:58:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:58:58,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305624883] [2020-11-06 21:58:58,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127102562] [2020-11-06 21:58:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-11-06 21:58:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 21:58:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:58:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:58:58,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:58:58,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-11-06 21:58:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615023564] [2020-11-06 21:58:58,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 21:58:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 21:58:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-11-06 21:58:58,574 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand 17 states. [2020-11-06 21:59:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:04,316 INFO L93 Difference]: Finished difference Result 300 states and 431 transitions. [2020-11-06 21:59:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 21:59:04,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-11-06 21:59:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:04,320 INFO L225 Difference]: With dead ends: 300 [2020-11-06 21:59:04,320 INFO L226 Difference]: Without dead ends: 188 [2020-11-06 21:59:04,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2020-11-06 21:59:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-06 21:59:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 150. [2020-11-06 21:59:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-06 21:59:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 204 transitions. [2020-11-06 21:59:04,347 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 204 transitions. Word has length 77 [2020-11-06 21:59:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:04,347 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 204 transitions. [2020-11-06 21:59:04,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 21:59:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 204 transitions. [2020-11-06 21:59:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-06 21:59:04,349 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:04,350 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:04,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:04,565 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash 603340875, now seen corresponding path program 2 times [2020-11-06 21:59:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:04,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055482671] [2020-11-06 21:59:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 21:59:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 21:59:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-06 21:59:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:04,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055482671] [2020-11-06 21:59:04,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637051148] [2020-11-06 21:59:04,859 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 [2020-11-06 21:59:05,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-06 21:59:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:05,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:05,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-11-06 21:59:05,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163894519] [2020-11-06 21:59:05,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 21:59:05,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:05,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 21:59:05,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:59:05,514 INFO L87 Difference]: Start difference. First operand 150 states and 204 transitions. Second operand 19 states. [2020-11-06 21:59:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:07,897 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2020-11-06 21:59:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 21:59:07,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-11-06 21:59:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:07,902 INFO L225 Difference]: With dead ends: 304 [2020-11-06 21:59:07,902 INFO L226 Difference]: Without dead ends: 189 [2020-11-06 21:59:07,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2020-11-06 21:59:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-06 21:59:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2020-11-06 21:59:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-06 21:59:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 207 transitions. [2020-11-06 21:59:07,932 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 207 transitions. Word has length 79 [2020-11-06 21:59:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:07,932 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 207 transitions. [2020-11-06 21:59:07,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 21:59:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 207 transitions. [2020-11-06 21:59:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-06 21:59:07,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:07,934 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:08,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-06 21:59:08,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -833924803, now seen corresponding path program 2 times [2020-11-06 21:59:08,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:08,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449256924] [2020-11-06 21:59:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-06 21:59:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-06 21:59:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-06 21:59:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449256924] [2020-11-06 21:59:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325264102] [2020-11-06 21:59:08,376 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 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 [2020-11-06 21:59:08,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:08,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 21:59:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:08,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:08,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-11-06 21:59:08,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223091310] [2020-11-06 21:59:08,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 21:59:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 21:59:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:59:08,673 INFO L87 Difference]: Start difference. First operand 152 states and 207 transitions. Second operand 19 states. [2020-11-06 21:59:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:10,286 INFO L93 Difference]: Finished difference Result 316 states and 456 transitions. [2020-11-06 21:59:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 21:59:10,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-11-06 21:59:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:10,289 INFO L225 Difference]: With dead ends: 316 [2020-11-06 21:59:10,290 INFO L226 Difference]: Without dead ends: 201 [2020-11-06 21:59:10,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=421, Invalid=769, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 21:59:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-06 21:59:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-11-06 21:59:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-06 21:59:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 212 transitions. [2020-11-06 21:59:10,317 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 212 transitions. Word has length 80 [2020-11-06 21:59:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:10,318 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 212 transitions. [2020-11-06 21:59:10,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 21:59:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 212 transitions. [2020-11-06 21:59:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-06 21:59:10,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:10,320 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:10,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:10,534 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1640392484, now seen corresponding path program 3 times [2020-11-06 21:59:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:10,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592333444] [2020-11-06 21:59:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 21:59:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 21:59:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 21:59:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:10,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592333444] [2020-11-06 21:59:10,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354559437] [2020-11-06 21:59:10,852 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 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 [2020-11-06 21:59:10,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 21:59:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-06 21:59:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-11-06 21:59:11,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:11,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-11-06 21:59:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706752577] [2020-11-06 21:59:11,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 21:59:11,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:11,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 21:59:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:59:11,147 INFO L87 Difference]: Start difference. First operand 156 states and 212 transitions. Second operand 19 states. [2020-11-06 21:59:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:15,217 INFO L93 Difference]: Finished difference Result 328 states and 469 transitions. [2020-11-06 21:59:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-06 21:59:15,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-11-06 21:59:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:15,220 INFO L225 Difference]: With dead ends: 328 [2020-11-06 21:59:15,220 INFO L226 Difference]: Without dead ends: 216 [2020-11-06 21:59:15,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=495, Invalid=2585, Unknown=0, NotChecked=0, Total=3080 [2020-11-06 21:59:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-06 21:59:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 173. [2020-11-06 21:59:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-06 21:59:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 240 transitions. [2020-11-06 21:59:15,249 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 240 transitions. Word has length 82 [2020-11-06 21:59:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:15,249 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 240 transitions. [2020-11-06 21:59:15,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 21:59:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 240 transitions. [2020-11-06 21:59:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-06 21:59:15,251 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:15,251 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:15,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:15,466 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1603716746, now seen corresponding path program 1 times [2020-11-06 21:59:15,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:15,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807452844] [2020-11-06 21:59:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-06 21:59:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 21:59:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-06 21:59:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807452844] [2020-11-06 21:59:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675448983] [2020-11-06 21:59:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 21:59:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 21:59:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:15,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:15,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-11-06 21:59:15,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334731097] [2020-11-06 21:59:15,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 21:59:15,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:15,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 21:59:15,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-06 21:59:15,992 INFO L87 Difference]: Start difference. First operand 173 states and 240 transitions. Second operand 21 states. [2020-11-06 21:59:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:18,025 INFO L93 Difference]: Finished difference Result 368 states and 546 transitions. [2020-11-06 21:59:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 21:59:18,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-11-06 21:59:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:18,029 INFO L225 Difference]: With dead ends: 368 [2020-11-06 21:59:18,029 INFO L226 Difference]: Without dead ends: 234 [2020-11-06 21:59:18,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=959, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 21:59:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-06 21:59:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2020-11-06 21:59:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-06 21:59:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 247 transitions. [2020-11-06 21:59:18,063 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 247 transitions. Word has length 83 [2020-11-06 21:59:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:18,063 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 247 transitions. [2020-11-06 21:59:18,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 21:59:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 247 transitions. [2020-11-06 21:59:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-06 21:59:18,065 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:18,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:18,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-06 21:59:18,280 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:18,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:18,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1149036137, now seen corresponding path program 1 times [2020-11-06 21:59:18,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:18,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434862533] [2020-11-06 21:59:18,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-06 21:59:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-06 21:59:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 21:59:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:18,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434862533] [2020-11-06 21:59:18,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259855842] [2020-11-06 21:59:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 21:59:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:18,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-06 21:59:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:19,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:19,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-11-06 21:59:19,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573285832] [2020-11-06 21:59:19,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 21:59:19,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:19,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 21:59:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-06 21:59:19,075 INFO L87 Difference]: Start difference. First operand 178 states and 247 transitions. Second operand 23 states. [2020-11-06 21:59:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:25,045 INFO L93 Difference]: Finished difference Result 363 states and 524 transitions. [2020-11-06 21:59:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 21:59:25,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-11-06 21:59:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:25,052 INFO L225 Difference]: With dead ends: 363 [2020-11-06 21:59:25,052 INFO L226 Difference]: Without dead ends: 226 [2020-11-06 21:59:25,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2020-11-06 21:59:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-06 21:59:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 180. [2020-11-06 21:59:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-06 21:59:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2020-11-06 21:59:25,081 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 85 [2020-11-06 21:59:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:25,081 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2020-11-06 21:59:25,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 21:59:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2020-11-06 21:59:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-06 21:59:25,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:25,083 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:25,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:25,298 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash -529961317, now seen corresponding path program 2 times [2020-11-06 21:59:25,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:25,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596344772] [2020-11-06 21:59:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 21:59:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 21:59:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-06 21:59:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:25,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596344772] [2020-11-06 21:59:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850468495] [2020-11-06 21:59:25,534 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 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 [2020-11-06 21:59:25,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 21:59:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-06 21:59:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-11-06 21:59:26,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:59:26,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13] total 26 [2020-11-06 21:59:26,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418412750] [2020-11-06 21:59:26,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 21:59:26,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 21:59:26,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-06 21:59:26,624 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand 15 states. [2020-11-06 21:59:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:27,656 INFO L93 Difference]: Finished difference Result 233 states and 326 transitions. [2020-11-06 21:59:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 21:59:27,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-11-06 21:59:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:27,662 INFO L225 Difference]: With dead ends: 233 [2020-11-06 21:59:27,663 INFO L226 Difference]: Without dead ends: 219 [2020-11-06 21:59:27,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 21:59:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-06 21:59:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2020-11-06 21:59:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-06 21:59:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2020-11-06 21:59:27,704 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 86 [2020-11-06 21:59:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:27,705 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2020-11-06 21:59:27,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 21:59:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2020-11-06 21:59:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-06 21:59:27,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:27,708 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:27,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-06 21:59:27,921 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1579385559, now seen corresponding path program 1 times [2020-11-06 21:59:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723072733] [2020-11-06 21:59:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-11-06 21:59:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 21:59:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:28,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-06 21:59:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:28,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723072733] [2020-11-06 21:59:28,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980084456] [2020-11-06 21:59:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 21:59:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 21:59:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:28,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:28,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-11-06 21:59:28,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388399358] [2020-11-06 21:59:28,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 21:59:28,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 21:59:28,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2020-11-06 21:59:28,480 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand 23 states. [2020-11-06 21:59:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:30,679 INFO L93 Difference]: Finished difference Result 429 states and 648 transitions. [2020-11-06 21:59:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 21:59:30,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-11-06 21:59:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:30,690 INFO L225 Difference]: With dead ends: 429 [2020-11-06 21:59:30,690 INFO L226 Difference]: Without dead ends: 268 [2020-11-06 21:59:30,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-11-06 21:59:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-06 21:59:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 208. [2020-11-06 21:59:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-06 21:59:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 297 transitions. [2020-11-06 21:59:30,728 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 297 transitions. Word has length 86 [2020-11-06 21:59:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:30,728 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 297 transitions. [2020-11-06 21:59:30,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 21:59:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 297 transitions. [2020-11-06 21:59:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-06 21:59:30,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:30,731 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:30,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-06 21:59:30,946 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:30,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1493164662, now seen corresponding path program 1 times [2020-11-06 21:59:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:30,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619858683] [2020-11-06 21:59:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-06 21:59:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-06 21:59:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-06 21:59:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 118 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:31,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619858683] [2020-11-06 21:59:31,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489486889] [2020-11-06 21:59:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 21:59:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:31,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:31,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-11-06 21:59:31,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504860317] [2020-11-06 21:59:31,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 21:59:31,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 21:59:31,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-11-06 21:59:31,970 INFO L87 Difference]: Start difference. First operand 208 states and 297 transitions. Second operand 25 states. [2020-11-06 21:59:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:36,171 INFO L93 Difference]: Finished difference Result 421 states and 619 transitions. [2020-11-06 21:59:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-06 21:59:36,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2020-11-06 21:59:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:36,175 INFO L225 Difference]: With dead ends: 421 [2020-11-06 21:59:36,176 INFO L226 Difference]: Without dead ends: 257 [2020-11-06 21:59:36,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=1895, Unknown=0, NotChecked=0, Total=2256 [2020-11-06 21:59:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-11-06 21:59:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 210. [2020-11-06 21:59:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-06 21:59:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 300 transitions. [2020-11-06 21:59:36,212 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 300 transitions. Word has length 88 [2020-11-06 21:59:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:36,212 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 300 transitions. [2020-11-06 21:59:36,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 21:59:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 300 transitions. [2020-11-06 21:59:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-06 21:59:36,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:36,215 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:36,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:36,429 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1602775770, now seen corresponding path program 2 times [2020-11-06 21:59:36,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:36,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291403632] [2020-11-06 21:59:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 21:59:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 21:59:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-06 21:59:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:36,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291403632] [2020-11-06 21:59:36,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435235952] [2020-11-06 21:59:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:36,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 21:59:36,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 25 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:37,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:37,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-11-06 21:59:37,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275851168] [2020-11-06 21:59:37,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 21:59:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 21:59:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2020-11-06 21:59:37,166 INFO L87 Difference]: Start difference. First operand 210 states and 300 transitions. Second operand 25 states. [2020-11-06 21:59:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:39,540 INFO L93 Difference]: Finished difference Result 445 states and 674 transitions. [2020-11-06 21:59:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 21:59:39,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 89 [2020-11-06 21:59:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:39,545 INFO L225 Difference]: With dead ends: 445 [2020-11-06 21:59:39,545 INFO L226 Difference]: Without dead ends: 281 [2020-11-06 21:59:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=760, Invalid=1402, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 21:59:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-06 21:59:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 214. [2020-11-06 21:59:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-06 21:59:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 305 transitions. [2020-11-06 21:59:39,583 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 305 transitions. Word has length 89 [2020-11-06 21:59:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:39,583 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 305 transitions. [2020-11-06 21:59:39,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 21:59:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 305 transitions. [2020-11-06 21:59:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-06 21:59:39,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:39,586 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:39,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-06 21:59:39,789 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1452842245, now seen corresponding path program 2 times [2020-11-06 21:59:39,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994830995] [2020-11-06 21:59:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:39,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:39,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:39,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:40,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-11-06 21:59:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:40,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 21:59:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:40,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-06 21:59:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:40,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994830995] [2020-11-06 21:59:40,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680223786] [2020-11-06 21:59:40,215 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:40,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:40,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-06 21:59:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 26 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 21:59:40,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:40,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-11-06 21:59:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310555214] [2020-11-06 21:59:40,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 21:59:40,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 21:59:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-11-06 21:59:40,881 INFO L87 Difference]: Start difference. First operand 214 states and 305 transitions. Second operand 27 states. [2020-11-06 21:59:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:46,499 INFO L93 Difference]: Finished difference Result 434 states and 638 transitions. [2020-11-06 21:59:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-06 21:59:46,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 91 [2020-11-06 21:59:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:46,504 INFO L225 Difference]: With dead ends: 434 [2020-11-06 21:59:46,504 INFO L226 Difference]: Without dead ends: 267 [2020-11-06 21:59:46,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2020-11-06 21:59:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-11-06 21:59:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2020-11-06 21:59:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-06 21:59:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 308 transitions. [2020-11-06 21:59:46,541 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 308 transitions. Word has length 91 [2020-11-06 21:59:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:46,541 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 308 transitions. [2020-11-06 21:59:46,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 21:59:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 308 transitions. [2020-11-06 21:59:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-06 21:59:46,543 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:46,544 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:46,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:46,757 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1442196599, now seen corresponding path program 3 times [2020-11-06 21:59:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:46,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112022934] [2020-11-06 21:59:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:47,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-11-06 21:59:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-06 21:59:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:47,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-06 21:59:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-06 21:59:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112022934] [2020-11-06 21:59:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478392737] [2020-11-06 21:59:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:47,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 21:59:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 21:59:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-06 21:59:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:47,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-11-06 21:59:47,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608213488] [2020-11-06 21:59:47,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-06 21:59:47,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-06 21:59:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-06 21:59:47,446 INFO L87 Difference]: Start difference. First operand 216 states and 308 transitions. Second operand 22 states. [2020-11-06 21:59:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:50,956 INFO L93 Difference]: Finished difference Result 443 states and 668 transitions. [2020-11-06 21:59:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-06 21:59:50,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 92 [2020-11-06 21:59:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:50,961 INFO L225 Difference]: With dead ends: 443 [2020-11-06 21:59:50,961 INFO L226 Difference]: Without dead ends: 264 [2020-11-06 21:59:50,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 21:59:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-11-06 21:59:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 204. [2020-11-06 21:59:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-06 21:59:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 280 transitions. [2020-11-06 21:59:51,000 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 280 transitions. Word has length 92 [2020-11-06 21:59:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:51,000 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 280 transitions. [2020-11-06 21:59:51,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-06 21:59:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 280 transitions. [2020-11-06 21:59:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 21:59:51,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:51,002 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:51,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-06 21:59:51,216 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1870848934, now seen corresponding path program 1 times [2020-11-06 21:59:51,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:51,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383370015] [2020-11-06 21:59:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 21:59:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 21:59:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-06 21:59:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-11-06 21:59:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-11-06 21:59:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383370015] [2020-11-06 21:59:51,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640371793] [2020-11-06 21:59:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 21:59:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-11-06 21:59:51,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 21:59:51,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-11-06 21:59:51,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251906605] [2020-11-06 21:59:51,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 21:59:51,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 21:59:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-06 21:59:51,578 INFO L87 Difference]: Start difference. First operand 204 states and 280 transitions. Second operand 4 states. [2020-11-06 21:59:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:51,756 INFO L93 Difference]: Finished difference Result 341 states and 470 transitions. [2020-11-06 21:59:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 21:59:51,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-11-06 21:59:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:51,761 INFO L225 Difference]: With dead ends: 341 [2020-11-06 21:59:51,761 INFO L226 Difference]: Without dead ends: 208 [2020-11-06 21:59:51,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-06 21:59:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2020-11-06 21:59:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-06 21:59:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2020-11-06 21:59:51,798 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 95 [2020-11-06 21:59:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:51,798 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2020-11-06 21:59:51,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 21:59:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2020-11-06 21:59:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-06 21:59:51,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:51,800 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:52,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-06 21:59:52,015 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash 532202317, now seen corresponding path program 4 times [2020-11-06 21:59:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:52,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949774140] [2020-11-06 21:59:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-06 21:59:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-11-06 21:59:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-11-06 21:59:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 4 proven. 175 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-06 21:59:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949774140] [2020-11-06 21:59:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116110415] [2020-11-06 21:59:52,539 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:52,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 21:59:52,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-06 21:59:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 21:59:53,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:53,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-11-06 21:59:53,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571303610] [2020-11-06 21:59:53,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-06 21:59:53,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-06 21:59:53,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-11-06 21:59:53,248 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 29 states. [2020-11-06 21:59:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:57,966 INFO L93 Difference]: Finished difference Result 402 states and 542 transitions. [2020-11-06 21:59:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-06 21:59:57,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 98 [2020-11-06 21:59:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:57,970 INFO L225 Difference]: With dead ends: 402 [2020-11-06 21:59:57,970 INFO L226 Difference]: Without dead ends: 258 [2020-11-06 21:59:57,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=453, Invalid=2627, Unknown=0, NotChecked=0, Total=3080 [2020-11-06 21:59:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-11-06 21:59:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 196. [2020-11-06 21:59:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-11-06 21:59:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 263 transitions. [2020-11-06 21:59:58,005 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 263 transitions. Word has length 98 [2020-11-06 21:59:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:58,006 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 263 transitions. [2020-11-06 21:59:58,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-06 21:59:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 263 transitions. [2020-11-06 21:59:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-06 21:59:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:58,007 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:58,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:58,222 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash -710152515, now seen corresponding path program 3 times [2020-11-06 21:59:58,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:58,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715421440] [2020-11-06 21:59:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:59:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 21:59:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-06 21:59:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 21:59:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-06 21:59:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 197 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-06 21:59:58,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715421440] [2020-11-06 21:59:58,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102099444] [2020-11-06 21:59:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:58,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 21:59:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 21:59:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-11-06 21:59:58,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:58,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-11-06 21:59:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445624598] [2020-11-06 21:59:58,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-06 21:59:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-06 21:59:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-11-06 21:59:58,934 INFO L87 Difference]: Start difference. First operand 196 states and 263 transitions. Second operand 22 states. [2020-11-06 22:00:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:00:02,677 INFO L93 Difference]: Finished difference Result 452 states and 677 transitions. [2020-11-06 22:00:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:00:02,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-11-06 22:00:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:00:02,683 INFO L225 Difference]: With dead ends: 452 [2020-11-06 22:00:02,684 INFO L226 Difference]: Without dead ends: 308 [2020-11-06 22:00:02,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2020-11-06 22:00:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-11-06 22:00:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 231. [2020-11-06 22:00:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-06 22:00:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 322 transitions. [2020-11-06 22:00:02,726 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 322 transitions. Word has length 99 [2020-11-06 22:00:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:00:02,726 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 322 transitions. [2020-11-06 22:00:02,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-06 22:00:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 322 transitions. [2020-11-06 22:00:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-06 22:00:02,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:00:02,728 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:00:02,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:00:02,942 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:00:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:00:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1781618922, now seen corresponding path program 1 times [2020-11-06 22:00:02,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:00:02,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693484107] [2020-11-06 22:00:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:00:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:02,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:00:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:00:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:00:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-06 22:00:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-06 22:00:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-11-06 22:00:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 4 proven. 209 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 22:00:03,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693484107] [2020-11-06 22:00:03,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400234011] [2020-11-06 22:00:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:00:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-06 22:00:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:00:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:00:04,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:00:04,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-11-06 22:00:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626328643] [2020-11-06 22:00:04,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:00:04,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:00:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:00:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:00:04,336 INFO L87 Difference]: Start difference. First operand 231 states and 322 transitions. Second operand 31 states. [2020-11-06 22:00:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:00:11,187 INFO L93 Difference]: Finished difference Result 477 states and 683 transitions. [2020-11-06 22:00:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-06 22:00:11,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-11-06 22:00:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:00:11,192 INFO L225 Difference]: With dead ends: 477 [2020-11-06 22:00:11,193 INFO L226 Difference]: Without dead ends: 299 [2020-11-06 22:00:11,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=502, Invalid=3038, Unknown=0, NotChecked=0, Total=3540 [2020-11-06 22:00:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-11-06 22:00:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 233. [2020-11-06 22:00:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-06 22:00:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2020-11-06 22:00:11,234 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 101 [2020-11-06 22:00:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:00:11,235 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2020-11-06 22:00:11,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:00:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2020-11-06 22:00:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:00:11,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:00:11,237 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:00:11,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-06 22:00:11,451 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:00:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:00:11,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2007751480, now seen corresponding path program 1 times [2020-11-06 22:00:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:00:11,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761341716] [2020-11-06 22:00:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:00:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:00:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:00:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:00:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 22:00:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-06 22:00:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-06 22:00:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 4 proven. 232 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 22:00:11,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761341716] [2020-11-06 22:00:11,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316801582] [2020-11-06 22:00:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:00:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 22:00:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:00:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 26 proven. 222 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:00:12,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:00:12,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-11-06 22:00:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338191369] [2020-11-06 22:00:12,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:00:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:00:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:00:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:00:12,323 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand 31 states. [2020-11-06 22:00:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:00:15,656 INFO L93 Difference]: Finished difference Result 513 states and 777 transitions. [2020-11-06 22:00:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:00:15,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 102 [2020-11-06 22:00:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:00:15,662 INFO L225 Difference]: With dead ends: 513 [2020-11-06 22:00:15,662 INFO L226 Difference]: Without dead ends: 335 [2020-11-06 22:00:15,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1198, Invalid=2224, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:00:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-11-06 22:00:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 237. [2020-11-06 22:00:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-11-06 22:00:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2020-11-06 22:00:15,707 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 102 [2020-11-06 22:00:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:00:15,707 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2020-11-06 22:00:15,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:00:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2020-11-06 22:00:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-06 22:00:15,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:00:15,709 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:00:15,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:00:15,924 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:00:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:00:15,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1097347865, now seen corresponding path program 2 times [2020-11-06 22:00:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:00:15,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516899800] [2020-11-06 22:00:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:00:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:15,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:00:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:15,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:00:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:15,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:00:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:16,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-06 22:00:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:16,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-11-06 22:00:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:16,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-06 22:00:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:00:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 4 proven. 245 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 22:00:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516899800] [2020-11-06 22:00:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011150596] [2020-11-06 22:00:16,584 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:07:09,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:07:09,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:07:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:07:09,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:07:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 27 proven. 234 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:07:10,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:07:10,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2020-11-06 22:07:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260142549] [2020-11-06 22:07:10,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-06 22:07:10,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:07:10,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-06 22:07:10,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:07:10,759 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand 33 states. [2020-11-06 22:07:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:07:19,430 INFO L93 Difference]: Finished difference Result 490 states and 701 transitions. [2020-11-06 22:07:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-06 22:07:19,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-11-06 22:07:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:07:19,435 INFO L225 Difference]: With dead ends: 490 [2020-11-06 22:07:19,435 INFO L226 Difference]: Without dead ends: 309 [2020-11-06 22:07:19,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2020-11-06 22:07:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-11-06 22:07:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 239. [2020-11-06 22:07:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-11-06 22:07:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2020-11-06 22:07:19,480 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 104 [2020-11-06 22:07:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:07:19,480 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2020-11-06 22:07:19,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-06 22:07:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2020-11-06 22:07:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-06 22:07:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:07:19,482 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:07:19,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-06 22:07:19,688 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:07:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:07:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2024782103, now seen corresponding path program 2 times [2020-11-06 22:07:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:07:19,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572008996] [2020-11-06 22:07:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:07:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:19,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:07:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:07:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:19,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:07:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-06 22:07:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-06 22:07:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:20,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-11-06 22:07:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 4 proven. 270 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-06 22:07:20,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572008996] [2020-11-06 22:07:20,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853024102] [2020-11-06 22:07:20,140 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true