/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:55:45,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:55:45,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:55:45,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:55:45,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:55:45,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:55:45,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:55:45,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:55:45,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:55:45,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:55:45,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:55:45,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:55:45,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:55:45,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:55:45,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:55:45,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:55:45,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:55:45,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:55:45,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:55:45,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:55:45,677 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 [2021-05-02 15:55:45,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:55:45,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:55:45,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:55:45,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:55:45,711 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:55:45,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:55:45,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:55:45,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:55:45,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:55:45,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:55:45,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:55:45,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:55:45,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:55:45,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:55:45,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:55:45,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:55:45,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:55:45,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:55:45,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:55:46,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:55:46,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:55:46,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:55:46,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:55:46,040 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:55:46,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2021-05-02 15:55:46,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f7cf1f0/e27fe70f346c48669912cf4b95713de9/FLAG3449c5a1b [2021-05-02 15:55:46,472 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:55:46,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2021-05-02 15:55:46,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f7cf1f0/e27fe70f346c48669912cf4b95713de9/FLAG3449c5a1b [2021-05-02 15:55:46,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9f7cf1f0/e27fe70f346c48669912cf4b95713de9 [2021-05-02 15:55:46,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:55:46,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:55:46,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:55:46,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:55:46,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:55:46,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c83fe6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46, skipping insertion in model container [2021-05-02 15:55:46,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:55:46,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:55:46,641 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c[560,573] [2021-05-02 15:55:46,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:55:46,673 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:55:46,684 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c[560,573] [2021-05-02 15:55:46,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:55:46,712 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:55:46,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46 WrapperNode [2021-05-02 15:55:46,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:55:46,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:55:46,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:55:46,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:55:46,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (1/1) ... [2021-05-02 15:55:46,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:55:46,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:55:46,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:55:46,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:55:46,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (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 [2021-05-02 15:55:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:55:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:55:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:55:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:55:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:55:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:55:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:55:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:55:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:55:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:55:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:55:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:55:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:55:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:55:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:55:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:55:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:55:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:55:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:55:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:55:47,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:55:47,119 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:55:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:55:47 BoogieIcfgContainer [2021-05-02 15:55:47,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:55:47,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:55:47,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:55:47,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:55:47,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:55:46" (1/3) ... [2021-05-02 15:55:47,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca3ea29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:55:47, skipping insertion in model container [2021-05-02 15:55:47,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:46" (2/3) ... [2021-05-02 15:55:47,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca3ea29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:55:47, skipping insertion in model container [2021-05-02 15:55:47,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:55:47" (3/3) ... [2021-05-02 15:55:47,126 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound5.c [2021-05-02 15:55:47,130 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:55:47,133 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:55:47,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:55:47,158 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:55:47,159 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:55:47,159 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:55:47,159 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:55:47,159 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:55:47,159 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:55:47,159 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:55:47,159 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:55:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:55:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:55:47,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:47,174 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:55:47,174 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2021-05-02 15:55:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:47,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013413006] [2021-05-02 15:55:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:55:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:55:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:55:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:55:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:55:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 15:55:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 15:55:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:55:47,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:55:47,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013413006] [2021-05-02 15:55:47,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013413006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:55:47,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:55:47,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:55:47,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745281837] [2021-05-02 15:55:47,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:55:47,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:55:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:55:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:55:47,425 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:55:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:55:47,553 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2021-05-02 15:55:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:55:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 15:55:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:55:47,559 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:55:47,560 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:55:47,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:55:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:55:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:55:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:55:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 15:55:47,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 15:55:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:55:47,618 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 15:55:47,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:55:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 15:55:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:55:47,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:47,620 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:55:47,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:55:47,621 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2021-05-02 15:55:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:47,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401194023] [2021-05-02 15:55:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:47,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:55:47,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203126784] [2021-05-02 15:55:47,667 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 [2021-05-02 15:55:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:55:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:55:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 15:55:48,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:55:48,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401194023] [2021-05-02 15:55:48,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:55:48,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203126784] [2021-05-02 15:55:48,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203126784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:55:48,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:55:48,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:55:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338981170] [2021-05-02 15:55:48,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:55:48,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:55:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:55:48,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:55:48,003 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:55:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:55:48,220 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-05-02 15:55:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:55:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 15:55:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:55:48,222 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:55:48,222 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 15:55:48,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:55:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 15:55:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-02 15:55:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:55:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-05-02 15:55:48,233 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 43 [2021-05-02 15:55:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:55:48,233 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-05-02 15:55:48,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:55:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-05-02 15:55:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:55:48,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:48,235 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 15:55:48,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:55:48,452 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash 314996066, now seen corresponding path program 1 times [2021-05-02 15:55:48,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:48,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751898827] [2021-05-02 15:55:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:48,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:55:48,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805526750] [2021-05-02 15:55:48,464 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