/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:55:14,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:55:14,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:55:14,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:55:14,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:55:14,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:55:14,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:55:14,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:55:14,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:55:14,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:55:14,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:55:14,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:55:14,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:55:14,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:55:14,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:55:14,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:55:14,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:55:14,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:55:14,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:55:14,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:55:14,596 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 15:55:14,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:55:14,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:55:14,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:55:14,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:55:14,637 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:55:14,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:55:14,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:55:14,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:55:14,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:55:14,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:55:14,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:55:14,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:55:14,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:55:14,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:55:14,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:55:14,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:55:14,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:55:14,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:55:14,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:55:14,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:55:14,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:55:14,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:55:14,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:55:14,969 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:55:14,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2021-05-02 15:55:15,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c311b6c/48081640bc2144e6bc495bc772ab1a96/FLAGe0fcb6dbc [2021-05-02 15:55:15,452 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:55:15,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound2.c [2021-05-02 15:55:15,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c311b6c/48081640bc2144e6bc495bc772ab1a96/FLAGe0fcb6dbc [2021-05-02 15:55:15,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3c311b6c/48081640bc2144e6bc495bc772ab1a96 [2021-05-02 15:55:15,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:55:15,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:55:15,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:55:15,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:55:15,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:55:15,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:55:15" (1/1) ... [2021-05-02 15:55:15,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ee1de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:15, skipping insertion in model container [2021-05-02 15:55:15,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:55:15" (1/1) ... [2021-05-02 15:55:15,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:55:15,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:55:16,005 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_valuebound2.c[560,573] [2021-05-02 15:55:16,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:55:16,034 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:55:16,078 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_valuebound2.c[560,573] [2021-05-02 15:55:16,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:55:16,106 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:55:16,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16 WrapperNode [2021-05-02 15:55:16,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:55:16,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:55:16,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:55:16,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:55:16,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (1/1) ... [2021-05-02 15:55:16,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:55:16,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:55:16,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:55:16,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:55:16,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (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 15:55:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:55:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:55:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:55:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:55:16,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:55:16,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:55:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:55:16,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:55:16,231 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:55:16,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:55:16,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:55:16,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:55:16,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:55:16,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:55:16,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:55:16,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:55:16,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:55:16,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:55:16,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:55:16,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:55:16,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:55:16,567 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:55:16,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:55:16 BoogieIcfgContainer [2021-05-02 15:55:16,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:55:16,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:55:16,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:55:16,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:55:16,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:55:15" (1/3) ... [2021-05-02 15:55:16,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7056e183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:55:16, skipping insertion in model container [2021-05-02 15:55:16,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:55:16" (2/3) ... [2021-05-02 15:55:16,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7056e183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:55:16, skipping insertion in model container [2021-05-02 15:55:16,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:55:16" (3/3) ... [2021-05-02 15:55:16,574 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound2.c [2021-05-02 15:55:16,579 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:55:16,585 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:55:16,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:55:16,628 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:55:16,628 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:55:16,628 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:55:16,628 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:55:16,629 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:55:16,629 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:55:16,629 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:55:16,629 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:55:16,649 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 15:55:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:55:16,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:16,655 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 15:55:16,655 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1520729432, now seen corresponding path program 1 times [2021-05-02 15:55:16,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:16,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153955390] [2021-05-02 15:55:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:55:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:55:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:55:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:55:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:55:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 15:55:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 15:55:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:16,947 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 15:55:16,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:55:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153955390] [2021-05-02 15:55:16,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153955390] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:55:16,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:55:16,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:55:16,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066126292] [2021-05-02 15:55:16,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:55:16,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:55:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:55:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:55:16,968 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 15:55:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:55:17,150 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2021-05-02 15:55:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:55:17,152 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 15:55:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:55:17,158 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:55:17,158 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:55:17,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:55:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:55:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:55:17,195 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 15:55:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 15:55:17,198 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 15:55:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:55:17,199 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 15:55:17,199 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 15:55:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 15:55:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:55:17,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:17,201 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 15:55:17,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:55:17,201 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1122529479, now seen corresponding path program 1 times [2021-05-02 15:55:17,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:17,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306622394] [2021-05-02 15:55:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:17,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:55:17,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548190139] [2021-05-02 15:55:17,224 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 15:55:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:55:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:55:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:55:17,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:55:17,602 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 15:55:17,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:55:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306622394] [2021-05-02 15:55:17,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:55:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548190139] [2021-05-02 15:55:17,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548190139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:55:17,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:55:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:55:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566004977] [2021-05-02 15:55:17,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:55:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:55:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:55:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:55:17,606 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 15:55:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:55:17,847 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-05-02 15:55:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:55:17,848 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 15:55:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:55:17,849 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:55:17,849 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 15:55:17,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:55:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 15:55:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-02 15:55:17,861 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 15:55:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-05-02 15:55:17,862 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 43 [2021-05-02 15:55:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:55:17,862 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-05-02 15:55:17,863 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 15:55:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-05-02 15:55:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:55:17,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:55:17,864 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 15:55:18,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:55:18,089 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:55:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:55:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 314996066, now seen corresponding path program 1 times [2021-05-02 15:55:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:55:18,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964264819] [2021-05-02 15:55:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:55:18,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:55:18,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853972134] [2021-05-02 15:55:18,107 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