/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/geo3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:04:29,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:04:29,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:04:29,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:04:29,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:04:29,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:04:29,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:04:29,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:04:29,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:04:29,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:04:29,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:04:29,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:04:29,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:04:29,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:04:29,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:04:29,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:04:29,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:04:29,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:04:29,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:04:29,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:04:29,909 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 [2021-05-06 03:04:29,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:04:29,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:04:29,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:04:29,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:04:29,931 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:04:29,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:04:29,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:04:29,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:04:29,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:04:29,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:04:29,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:04:29,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:04:29,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:04:29,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:04:29,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:04:30,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:04:30,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:04:30,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:04:30,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:04:30,186 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:04:30,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-06 03:04:30,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ed305ff/db9f8fbff2a0402a9ab2d21a46bd74b4/FLAG813a302e3 [2021-05-06 03:04:30,565 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:04:30,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-06 03:04:30,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ed305ff/db9f8fbff2a0402a9ab2d21a46bd74b4/FLAG813a302e3 [2021-05-06 03:04:31,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ed305ff/db9f8fbff2a0402a9ab2d21a46bd74b4 [2021-05-06 03:04:31,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:04:31,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:04:31,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:04:31,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:04:31,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:04:31,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6de92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31, skipping insertion in model container [2021-05-06 03:04:31,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:04:31,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:04:31,116 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/geo3-ll_valuebound50.c[525,538] [2021-05-06 03:04:31,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:04:31,128 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:04:31,135 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/geo3-ll_valuebound50.c[525,538] [2021-05-06 03:04:31,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:04:31,146 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:04:31,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31 WrapperNode [2021-05-06 03:04:31,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:04:31,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:04:31,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:04:31,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:04:31,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (1/1) ... [2021-05-06 03:04:31,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:04:31,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:04:31,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:04:31,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:04:31,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (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 [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:04:31,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:04:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:04:31,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:04:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:04:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:04:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:04:31,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:04:31,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:04:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:04:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:04:31,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:04:31,505 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 03:04:31,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:04:31 BoogieIcfgContainer [2021-05-06 03:04:31,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:04:31,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:04:31,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:04:31,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:04:31,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:04:31" (1/3) ... [2021-05-06 03:04:31,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4b5083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:04:31, skipping insertion in model container [2021-05-06 03:04:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:04:31" (2/3) ... [2021-05-06 03:04:31,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4b5083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:04:31, skipping insertion in model container [2021-05-06 03:04:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:04:31" (3/3) ... [2021-05-06 03:04:31,511 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound50.c [2021-05-06 03:04:31,531 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:04:31,534 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:04:31,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:04:31,569 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:04:31,570 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:04:31,570 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:04:31,570 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:04:31,570 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:04:31,570 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:04:31,570 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:04:31,570 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:04:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:04:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 03:04:31,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:04:31,592 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:04:31,592 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:04:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:04:31,596 INFO L82 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 1 times [2021-05-06 03:04:31,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:04:31,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446194493] [2021-05-06 03:04:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:04:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:31,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:04:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:31,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:04:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:31,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:04:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 03:04:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:04:31,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:04:31,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446194493] [2021-05-06 03:04:31,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446194493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:04:31,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:04:31,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:04:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166530833] [2021-05-06 03:04:31,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:04:31,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:04:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:04:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:04:31,796 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:04:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:04:31,875 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-05-06 03:04:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:04:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 03:04:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:04:31,881 INFO L225 Difference]: With dead ends: 55 [2021-05-06 03:04:31,881 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 03:04:31,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:04:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 03:04:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 03:04:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 03:04:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 03:04:31,921 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-06 03:04:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:04:31,922 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 03:04:31,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:04:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 03:04:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 03:04:31,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:04:31,923 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:04:31,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:04:31,923 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:04:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:04:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 1 times [2021-05-06 03:04:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:04:31,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31744717] [2021-05-06 03:04:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:04:31,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:04:31,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673317491] [2021-05-06 03:04:31,938 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 [2021-05-06 03:04:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:04:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:04:32,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:04:32,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:04:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31744717] [2021-05-06 03:04:32,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:04:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673317491] [2021-05-06 03:04:32,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673317491] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:04:32,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:04:32,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:04:32,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134505175] [2021-05-06 03:04:32,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:04:32,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:04:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:04:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:04:32,222 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:04:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:04:32,265 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 03:04:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:04:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 03:04:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:04:32,267 INFO L225 Difference]: With dead ends: 36 [2021-05-06 03:04:32,267 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:04:32,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:04:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:04:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:04:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 03:04:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 03:04:32,274 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-06 03:04:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:04:32,275 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 03:04:32,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:04:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 03:04:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:04:32,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:04:32,276 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:04:32,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 03:04:32,481 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:04:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:04:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 1 times [2021-05-06 03:04:32,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:04:32,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303958130] [2021-05-06 03:04:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:04:32,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:04:32,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057557866] [2021-05-06 03:04:32,493 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 [2021-05-06 03:04:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:04:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 03:04:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:04:32,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:04:32,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:04:32,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303958130] [2021-05-06 03:04:32,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:04:32,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057557866] [2021-05-06 03:04:32,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057557866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:04:32,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:04:32,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:04:32,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099638956] [2021-05-06 03:04:32,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:04:32,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:04:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:04:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:04:32,727 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:04:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:04:32,977 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-06 03:04:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:04:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:04:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:04:32,980 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:04:32,980 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 03:04:32,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:04:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 03:04:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 03:04:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:04:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-06 03:04:32,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-05-06 03:04:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:04:32,989 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-06 03:04:32,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:04:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-06 03:04:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 03:04:32,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:04:32,990 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:04:33,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:04:33,208 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:04:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:04:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 2 times [2021-05-06 03:04:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:04:33,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110255953] [2021-05-06 03:04:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:04:33,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:04:33,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119035839] [2021-05-06 03:04:33,223 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 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 [2021-05-06 03:04:33,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:04:33,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:04:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 03:04:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:04:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:33,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:04:33,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:04:33,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110255953] [2021-05-06 03:04:33,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:04:33,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119035839] [2021-05-06 03:04:33,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119035839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:04:33,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:04:33,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:04:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129724281] [2021-05-06 03:04:33,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:04:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:04:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:04:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:04:33,492 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:04:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:04:33,653 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 03:04:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:04:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-05-06 03:04:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:04:33,655 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:04:33,655 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 03:04:33,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:04:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 03:04:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 03:04:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:04:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-05-06 03:04:33,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2021-05-06 03:04:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:04:33,662 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-05-06 03:04:33,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:04:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-05-06 03:04:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 03:04:33,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:04:33,663 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:04:33,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:04:33,877 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:04:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:04:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 3 times [2021-05-06 03:04:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:04:33,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448260187] [2021-05-06 03:04:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:04:33,887 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:04:33,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668358994] [2021-05-06 03:04:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 03:04:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 03:04:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:04:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:04:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:04:42,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:42,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:04:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 03:04:42,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:04:42,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448260187] [2021-05-06 03:04:42,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:04:42,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668358994] [2021-05-06 03:04:42,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668358994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:04:42,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:04:42,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:04:42,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165416095] [2021-05-06 03:04:42,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:04:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:04:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:04:42,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:04:42,932 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:04:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:04:56,893 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-06 03:04:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:04:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2021-05-06 03:04:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:04:56,894 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:04:56,894 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 03:04:56,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8239.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:04:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 03:04:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 03:04:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 03:04:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 03:04:56,895 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-06 03:04:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:04:56,895 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 03:04:56,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:04:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 03:04:56,896 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 03:04:57,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:04:57,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.