/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:57:18,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:57:18,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:57:18,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:57:18,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:57:18,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:57:18,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:57:18,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:57:18,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:57:18,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:57:18,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:57:18,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:57:18,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:57:18,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:57:18,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:57:18,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:57:18,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:57:18,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:57:18,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:57:18,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:57:18,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:57:18,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:57:18,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:57:18,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:57:18,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:57:18,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:57:18,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:57:18,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:57:18,846 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 [2020-08-22 16:57:18,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:57:18,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:57:18,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:57:18,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:57:18,879 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:57:18,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:57:18,880 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:57:18,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:57:18,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:57:18,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:57:18,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:57:18,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:57:18,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:57:18,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:57:18,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:57:18,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:57:18,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:57:18,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:57:18,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:57:18,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:57:18,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:57:18,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:18,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:57:18,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:57:18,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:57:18,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:57:18,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:57:18,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:57:18,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:57:18,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:57:19,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:57:19,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:57:19,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:57:19,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:57:19,195 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:57:19,196 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 16:57:19,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5584898/6be7b744b3044993a27f1b0c2c76bfe5/FLAG9f20b96d9 [2020-08-22 16:57:19,787 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:57:19,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 16:57:19,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5584898/6be7b744b3044993a27f1b0c2c76bfe5/FLAG9f20b96d9 [2020-08-22 16:57:20,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d5584898/6be7b744b3044993a27f1b0c2c76bfe5 [2020-08-22 16:57:20,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:20,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:20,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:20,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:20,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:20,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d07a9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20, skipping insertion in model container [2020-08-22 16:57:20,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:20,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:20,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:20,395 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:20,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:20,552 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:20,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20 WrapperNode [2020-08-22 16:57:20,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:20,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:20,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:20,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:20,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (1/1) ... [2020-08-22 16:57:20,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:20,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:20,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:20,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:20,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (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 [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-22 16:57:20,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 16:57:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-22 16:57:20,677 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-22 16:57:20,678 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-22 16:57:20,679 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-22 16:57:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-22 16:57:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:20,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:21,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:21,160 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 16:57:21,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:21 BoogieIcfgContainer [2020-08-22 16:57:21,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:21,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:21,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:21,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:21,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:20" (1/3) ... [2020-08-22 16:57:21,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65873b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:21, skipping insertion in model container [2020-08-22 16:57:21,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:20" (2/3) ... [2020-08-22 16:57:21,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65873b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:21, skipping insertion in model container [2020-08-22 16:57:21,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:21" (3/3) ... [2020-08-22 16:57:21,173 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 16:57:21,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:21,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:21,206 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:21,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:21,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:21,228 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:21,228 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:21,228 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:21,228 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:21,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:21,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-22 16:57:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 16:57:21,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:21,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:21,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-08-22 16:57:21,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:21,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332913034] [2020-08-22 16:57:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:57:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:21,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332913034] [2020-08-22 16:57:21,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:21,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:21,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070946303] [2020-08-22 16:57:21,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:21,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:21,518 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-08-22 16:57:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:21,739 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-08-22 16:57:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:21,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-22 16:57:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:21,751 INFO L225 Difference]: With dead ends: 104 [2020-08-22 16:57:21,751 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 16:57:21,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 16:57:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-22 16:57:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:57:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-08-22 16:57:21,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-08-22 16:57:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:21,803 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-08-22 16:57:21,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-08-22 16:57:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:57:21,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:21,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:21,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:21,806 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-08-22 16:57:21,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:21,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057356005] [2020-08-22 16:57:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:57:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:21,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057356005] [2020-08-22 16:57:21,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275632938] [2020-08-22 16:57:21,930 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 [2020-08-22 16:57:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2020-08-22 16:57:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:57:22,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:22,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-08-22 16:57:22,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143662984] [2020-08-22 16:57:22,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:22,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:22,075 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 3 states. [2020-08-22 16:57:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:22,091 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-08-22 16:57:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:22,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-08-22 16:57:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:22,094 INFO L225 Difference]: With dead ends: 84 [2020-08-22 16:57:22,094 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 16:57:22,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 16:57:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 16:57:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 16:57:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-08-22 16:57:22,104 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2020-08-22 16:57:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:22,104 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-08-22 16:57:22,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-08-22 16:57:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:57:22,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:22,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:22,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:57:22,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:22,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash 446687854, now seen corresponding path program 1 times [2020-08-22 16:57:22,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:22,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254763346] [2020-08-22 16:57:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:57:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:22,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254763346] [2020-08-22 16:57:22,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385521527] [2020-08-22 16:57:22,409 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 [2020-08-22 16:57:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:22,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:57:22,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:22,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-08-22 16:57:22,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437684757] [2020-08-22 16:57:22,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:22,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:22,589 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-08-22 16:57:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:22,684 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-08-22 16:57:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:22,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 16:57:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:22,688 INFO L225 Difference]: With dead ends: 109 [2020-08-22 16:57:22,688 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 16:57:22,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 16:57:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-08-22 16:57:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 16:57:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-08-22 16:57:22,703 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 38 [2020-08-22 16:57:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:22,703 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-08-22 16:57:22,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-08-22 16:57:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 16:57:22,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:22,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:22,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:22,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:22,919 INFO L82 PathProgramCache]: Analyzing trace with hash -140118160, now seen corresponding path program 1 times [2020-08-22 16:57:22,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:22,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683270978] [2020-08-22 16:57:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:57:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:22,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683270978] [2020-08-22 16:57:22,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975705000] [2020-08-22 16:57:22,993 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 [2020-08-22 16:57:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:57:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:23,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:23,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-08-22 16:57:23,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471977746] [2020-08-22 16:57:23,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:23,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:23,096 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 6 states. [2020-08-22 16:57:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:23,217 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-08-22 16:57:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:23,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 16:57:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:23,218 INFO L225 Difference]: With dead ends: 100 [2020-08-22 16:57:23,219 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 16:57:23,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 16:57:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 16:57:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 16:57:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-08-22 16:57:23,228 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 38 [2020-08-22 16:57:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:23,228 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-08-22 16:57:23,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-08-22 16:57:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:57:23,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:23,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:23,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:23,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1477568014, now seen corresponding path program 2 times [2020-08-22 16:57:23,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:23,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032589960] [2020-08-22 16:57:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:23,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:57:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:23,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032589960] [2020-08-22 16:57:23,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435961455] [2020-08-22 16:57:23,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:23,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:57:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:57:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:57:23,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:23,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-08-22 16:57:23,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119898662] [2020-08-22 16:57:23,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:23,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:23,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:23,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:23,688 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-08-22 16:57:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:23,822 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-08-22 16:57:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:23,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-22 16:57:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:23,824 INFO L225 Difference]: With dead ends: 147 [2020-08-22 16:57:23,824 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 16:57:23,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:57:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 16:57:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2020-08-22 16:57:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 16:57:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-08-22 16:57:23,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 40 [2020-08-22 16:57:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:23,834 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-08-22 16:57:23,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-08-22 16:57:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:57:23,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:23,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:24,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:24,036 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1128455540, now seen corresponding path program 1 times [2020-08-22 16:57:24,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:24,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017993825] [2020-08-22 16:57:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:57:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:24,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017993825] [2020-08-22 16:57:24,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764734485] [2020-08-22 16:57:24,126 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 [2020-08-22 16:57:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:24,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:24,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-08-22 16:57:24,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022754943] [2020-08-22 16:57:24,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:57:24,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:57:24,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:24,225 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 7 states. [2020-08-22 16:57:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:24,340 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-08-22 16:57:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:24,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-22 16:57:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:24,341 INFO L225 Difference]: With dead ends: 116 [2020-08-22 16:57:24,341 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 16:57:24,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 16:57:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-08-22 16:57:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:57:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-08-22 16:57:24,353 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2020-08-22 16:57:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:24,353 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-08-22 16:57:24,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:57:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-08-22 16:57:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:57:24,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:24,355 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 16:57:24,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:57:24,558 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:24,558 INFO L82 PathProgramCache]: Analyzing trace with hash 34367350, now seen corresponding path program 2 times [2020-08-22 16:57:24,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:24,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127342248] [2020-08-22 16:57:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:57:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:24,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127342248] [2020-08-22 16:57:24,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435819408] [2020-08-22 16:57:24,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:24,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:57:24,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:24,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 16:57:24,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:24,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-08-22 16:57:24,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456528748] [2020-08-22 16:57:24,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:24,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:24,831 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 5 states. [2020-08-22 16:57:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:24,955 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-08-22 16:57:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:24,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-08-22 16:57:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:24,958 INFO L225 Difference]: With dead ends: 134 [2020-08-22 16:57:24,958 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 16:57:24,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:57:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 16:57:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-08-22 16:57:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 16:57:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-08-22 16:57:24,977 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 42 [2020-08-22 16:57:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:24,978 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-08-22 16:57:24,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-08-22 16:57:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 16:57:24,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:24,983 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 16:57:25,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:25,202 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash -615754617, now seen corresponding path program 1 times [2020-08-22 16:57:25,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:25,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782694850] [2020-08-22 16:57:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 16:57:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:25,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782694850] [2020-08-22 16:57:25,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817859312] [2020-08-22 16:57:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:25,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:25,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-08-22 16:57:25,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376762393] [2020-08-22 16:57:25,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:57:25,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:57:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:25,360 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 8 states. [2020-08-22 16:57:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:25,475 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-08-22 16:57:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:25,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-08-22 16:57:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:25,477 INFO L225 Difference]: With dead ends: 108 [2020-08-22 16:57:25,477 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 16:57:25,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 16:57:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 16:57:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 16:57:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-08-22 16:57:25,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 47 [2020-08-22 16:57:25,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:25,484 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-08-22 16:57:25,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:57:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-08-22 16:57:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:57:25,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:25,486 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-22 16:57:25,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:25,699 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash -900340667, now seen corresponding path program 2 times [2020-08-22 16:57:25,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:25,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604753827] [2020-08-22 16:57:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:57:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:25,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604753827] [2020-08-22 16:57:25,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403840688] [2020-08-22 16:57:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:57:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 16:57:25,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:25,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2020-08-22 16:57:25,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357655943] [2020-08-22 16:57:25,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:25,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:57:25,924 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2020-08-22 16:57:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:26,077 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2020-08-22 16:57:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:26,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-08-22 16:57:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:26,079 INFO L225 Difference]: With dead ends: 160 [2020-08-22 16:57:26,080 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 16:57:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:57:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 16:57:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-08-22 16:57:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 16:57:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-08-22 16:57:26,089 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 49 [2020-08-22 16:57:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:26,090 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-08-22 16:57:26,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-08-22 16:57:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:57:26,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:26,092 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-22 16:57:26,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:57:26,306 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:26,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1705682887, now seen corresponding path program 1 times [2020-08-22 16:57:26,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:26,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772832844] [2020-08-22 16:57:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:57:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:26,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772832844] [2020-08-22 16:57:26,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165643390] [2020-08-22 16:57:26,405 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 [2020-08-22 16:57:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:57:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:26,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:26,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-08-22 16:57:26,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800625870] [2020-08-22 16:57:26,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:57:26,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:57:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:26,502 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 9 states. [2020-08-22 16:57:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:26,609 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-08-22 16:57:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:57:26,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-08-22 16:57:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:26,612 INFO L225 Difference]: With dead ends: 154 [2020-08-22 16:57:26,612 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 16:57:26,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 16:57:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 16:57:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 16:57:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2020-08-22 16:57:26,619 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 49 [2020-08-22 16:57:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:26,619 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2020-08-22 16:57:26,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:57:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2020-08-22 16:57:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 16:57:26,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:26,620 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-08-22 16:57:26,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:26,834 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1198571515, now seen corresponding path program 2 times [2020-08-22 16:57:26,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:26,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701961080] [2020-08-22 16:57:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 16:57:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:57:26,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701961080] [2020-08-22 16:57:26,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216545507] [2020-08-22 16:57:26,912 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 [2020-08-22 16:57:26,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:57:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:27,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 16:57:27,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:27,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2020-08-22 16:57:27,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175824592] [2020-08-22 16:57:27,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:27,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:57:27,040 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 5 states. [2020-08-22 16:57:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:27,100 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-08-22 16:57:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:27,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-08-22 16:57:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:27,101 INFO L225 Difference]: With dead ends: 86 [2020-08-22 16:57:27,102 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:57:27,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:57:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:57:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:57:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:57:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:57:27,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-08-22 16:57:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:27,105 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:57:27,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:57:27,105 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:57:27,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:27,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:57:27,425 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-08-22 16:57:27,425 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-08-22 16:57:27,425 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-08-22 16:57:27,425 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-08-22 16:57:27,425 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-08-22 16:57:27,426 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-22 16:57:27,426 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-08-22 16:57:27,426 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-08-22 16:57:27,426 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-08-22 16:57:27,426 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-22 16:57:27,426 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-08-22 16:57:27,426 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-08-22 16:57:27,427 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-08-22 16:57:27,428 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-08-22 16:57:27,428 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 16:57:27,429 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-22 16:57:27,429 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:57:27,429 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:57:27,429 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-08-22 16:57:27,430 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 16:57:27,430 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 16:57:27,431 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 16:57:27,431 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 16:57:27,431 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 16:57:27,431 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 16:57:27,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:27 BoogieIcfgContainer [2020-08-22 16:57:27,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:27,450 INFO L168 Benchmark]: Toolchain (without parser) took 7314.89 ms. Allocated memory was 145.8 MB in the beginning and 270.5 MB in the end (delta: 124.8 MB). Free memory was 103.1 MB in the beginning and 103.7 MB in the end (delta: -614.4 kB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,452 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.7 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.00 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.7 MB in the beginning and 179.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,456 INFO L168 Benchmark]: Boogie Preprocessor took 47.01 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 177.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,463 INFO L168 Benchmark]: RCFGBuilder took 563.63 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 148.7 MB in the end (delta: 29.2 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,464 INFO L168 Benchmark]: TraceAbstraction took 6281.48 ms. Allocated memory was 203.4 MB in the beginning and 270.5 MB in the end (delta: 67.1 MB). Free memory was 148.7 MB in the beginning and 103.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:27,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.7 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 418.00 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.7 MB in the beginning and 179.7 MB in the end (delta: -77.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.01 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 177.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 563.63 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 148.7 MB in the end (delta: 29.2 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6281.48 ms. Allocated memory was 203.4 MB in the beginning and 270.5 MB in the end (delta: 67.1 MB). Free memory was 148.7 MB in the beginning and 103.7 MB in the end (delta: 45.0 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 562 SDtfs, 251 SDslu, 1336 SDs, 0 SdLazy, 769 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 532 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 97 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 64 PreInvPairs, 94 NumberOfFragments, 35 HoareAnnotationTreeSize, 64 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 896 NumberOfCodeBlocks, 858 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 875 ConstructedInterpolants, 0 QuantifiedInterpolants, 62932 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1443 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 72/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...