/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/fermat1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:04:41,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:04:41,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:04:41,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:04:41,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:04:41,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:04:41,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:04:41,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:04:41,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:04:41,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:04:41,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:04:41,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:04:41,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:04:41,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:04:41,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:04:41,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:04:41,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:04:41,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:04:41,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:04:41,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:04:41,368 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 15:04:41,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:04:41,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:04:41,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:04:41,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:04:41,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:04:41,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:04:41,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:04:41,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:04:41,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:04:41,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:04:41,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:04:41,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:04:41,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:04:41,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:04:41,725 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:04:41,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound10.c [2021-05-02 15:04:41,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f2d81e9/5eb98f6087d64c258d2d10afc92258ee/FLAG3c9ad65f2 [2021-05-02 15:04:42,139 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:04:42,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound10.c [2021-05-02 15:04:42,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f2d81e9/5eb98f6087d64c258d2d10afc92258ee/FLAG3c9ad65f2 [2021-05-02 15:04:42,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f2d81e9/5eb98f6087d64c258d2d10afc92258ee [2021-05-02 15:04:42,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:04:42,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:04:42,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:04:42,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:04:42,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:04:42,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b8d210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42, skipping insertion in model container [2021-05-02 15:04:42,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:04:42,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:04:42,674 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/fermat1-ll_valuebound10.c[535,548] [2021-05-02 15:04:42,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:04:42,689 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:04:42,696 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/fermat1-ll_valuebound10.c[535,548] [2021-05-02 15:04:42,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:04:42,743 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:04:42,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42 WrapperNode [2021-05-02 15:04:42,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:04:42,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:04:42,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:04:42,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:04:42,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (1/1) ... [2021-05-02 15:04:42,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:04:42,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:04:42,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:04:42,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:04:42,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (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 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:04:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:04:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:04:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:04:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:04:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:04:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:04:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:04:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:04:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:04:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:04:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:04:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:04:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:04:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:04:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:04:43,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:04:43,114 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:04:43,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:04:43 BoogieIcfgContainer [2021-05-02 15:04:43,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:04:43,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:04:43,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:04:43,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:04:43,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:04:42" (1/3) ... [2021-05-02 15:04:43,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145774f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:04:43, skipping insertion in model container [2021-05-02 15:04:43,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:04:42" (2/3) ... [2021-05-02 15:04:43,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145774f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:04:43, skipping insertion in model container [2021-05-02 15:04:43,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:04:43" (3/3) ... [2021-05-02 15:04:43,119 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound10.c [2021-05-02 15:04:43,122 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:04:43,124 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:04:43,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:04:43,146 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:04:43,146 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:04:43,146 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:04:43,146 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:04:43,146 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:04:43,147 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:04:43,147 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:04:43,147 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:04:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:04:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:04:43,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:43,159 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:04:43,159 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times [2021-05-02 15:04:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:43,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183515094] [2021-05-02 15:04:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:04:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:04:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:04:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:04:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:04:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:04:43,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183515094] [2021-05-02 15:04:43,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183515094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:04:43,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:04:43,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:04:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154077008] [2021-05-02 15:04:43,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:04:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:04:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:04:43,321 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:04:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:43,416 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2021-05-02 15:04:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:04:43,417 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, (7), 3 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 33 [2021-05-02 15:04:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:43,421 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:04:43,421 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:04:43,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:04:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:04:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:04:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:04:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 15:04:43,483 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 15:04:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:43,483 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 15:04:43,483 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:04:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 15:04:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:04:43,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:43,484 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:04:43,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:04:43,485 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times [2021-05-02 15:04:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868327487] [2021-05-02 15:04:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:43,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:43,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690420340] [2021-05-02 15:04:43,529 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 15:04:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:04:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:04:43,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868327487] [2021-05-02 15:04:43,942 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:43,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690420340] [2021-05-02 15:04:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690420340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:43,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:43,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:04:43,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143242766] [2021-05-02 15:04:43,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:04:43,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:04:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:04:43,945 INFO L87 Difference]: Start difference. First operand 32 states and 40 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, (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) [2021-05-02 15:04:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:04:48,102 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 15:04:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:04:48,104 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, (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 33 [2021-05-02 15:04:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:04:48,105 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:04:48,105 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 15:04:48,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:04:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 15:04:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 15:04:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:04:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 15:04:48,123 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 15:04:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:04:48,123 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 15:04:48,123 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, (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) [2021-05-02 15:04:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 15:04:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:04:48,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:04:48,124 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:04:48,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:04:48,341 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:04:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:04:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash 936002262, now seen corresponding path program 1 times [2021-05-02 15:04:48,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:04:48,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608343350] [2021-05-02 15:04:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:04:48,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:04:48,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069230502] [2021-05-02 15:04:48,357 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 [2021-05-02 15:04:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:04:48,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:04:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:04:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:04:48,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:48,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608343350] [2021-05-02 15:04:48,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069230502] [2021-05-02 15:04:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069230502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:48,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:48,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:04:48,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585970133] [2021-05-02 15:04:48,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:04:48,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:04:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:04:48,561 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:05:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:01,998 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-02 15:05:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:05:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:05:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:02,000 INFO L225 Difference]: With dead ends: 63 [2021-05-02 15:05:02,000 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:05:02,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:05:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:05:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 15:05:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:05:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 15:05:02,009 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 15:05:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:02,010 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 15:05:02,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:05:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 15:05:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:05:02,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:02,011 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:02,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:02,226 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 584476005, now seen corresponding path program 1 times [2021-05-02 15:05:02,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:02,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926231611] [2021-05-02 15:05:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:02,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:02,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803813565] [2021-05-02 15:05:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:05:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:02,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,543 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:05:06,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:05:06,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926231611] [2021-05-02 15:05:06,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803813565] [2021-05-02 15:05:06,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803813565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:06,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:06,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:05:06,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375821994] [2021-05-02 15:05:06,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:05:06,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:05:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:05:06,649 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:05:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:08,982 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-02 15:05:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:05:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 15:05:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:08,985 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:05:08,985 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:05:08,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4136.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:05:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:05:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-05-02 15:05:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:05:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 15:05:08,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2021-05-02 15:05:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:08,997 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 15:05:08,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:05:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 15:05:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:05:08,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:08,998 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:09,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:09,216 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash -629102554, now seen corresponding path program 2 times [2021-05-02 15:05:09,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:09,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028725716] [2021-05-02 15:05:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:09,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:09,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910322848] [2021-05-02 15:05:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:09,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:05:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:05:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:05:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 15:05:09,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:09,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028725716] [2021-05-02 15:05:09,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:09,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910322848] [2021-05-02 15:05:09,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910322848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:09,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:09,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:05:09,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975145568] [2021-05-02 15:05:09,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:05:09,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:05:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:05:09,473 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:05:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:11,810 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2021-05-02 15:05:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:05:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 15:05:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:11,812 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:05:11,812 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:05:11,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:05:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:05:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-05-02 15:05:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:05:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-05-02 15:05:11,824 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 54 [2021-05-02 15:05:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:11,824 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-05-02 15:05:11,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:05:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-05-02 15:05:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:05:11,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:11,825 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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 15:05:12,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:12,040 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1844116037, now seen corresponding path program 3 times [2021-05-02 15:05:12,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:12,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307504412] [2021-05-02 15:05:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:12,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:12,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151159714] [2021-05-02 15:05:12,048 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:12,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:05:12,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:05:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:05:12,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:05:15,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:15,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307504412] [2021-05-02 15:05:15,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:15,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151159714] [2021-05-02 15:05:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151159714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:15,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:15,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:05:15,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151412158] [2021-05-02 15:05:15,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:05:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:05:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=130, Unknown=1, NotChecked=0, Total=156 [2021-05-02 15:05:15,593 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:05:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:23,804 INFO L93 Difference]: Finished difference Result 177 states and 217 transitions. [2021-05-02 15:05:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:05:23,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 15:05:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:23,806 INFO L225 Difference]: With dead ends: 177 [2021-05-02 15:05:23,806 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 15:05:23,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3204.6ms TimeCoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2021-05-02 15:05:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 15:05:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 15:05:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 126 states have internal predecessors, (132), 42 states have call successors, (42), 18 states have call predecessors, (42), 17 states have return successors, (41), 30 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 15:05:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 215 transitions. [2021-05-02 15:05:23,856 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 215 transitions. Word has length 61 [2021-05-02 15:05:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:23,857 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 215 transitions. [2021-05-02 15:05:23,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:05:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 215 transitions. [2021-05-02 15:05:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:05:23,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:23,859 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:24,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:05:24,064 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1766314924, now seen corresponding path program 1 times [2021-05-02 15:05:24,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:24,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186794611] [2021-05-02 15:05:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:24,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:24,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925504921] [2021-05-02 15:05:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:24,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:05:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:24,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:27,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:27,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186794611] [2021-05-02 15:05:27,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:27,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925504921] [2021-05-02 15:05:27,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-05-02 15:05:27,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:05:27,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:05:27,217 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:05:27,217 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:05:27,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:27,446 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:05:27,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:05:27 BoogieIcfgContainer [2021-05-02 15:05:27,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:05:27,446 INFO L168 Benchmark]: Toolchain (without parser) took 44869.05 ms. Allocated memory is still 179.3 MB. Free memory was 144.2 MB in the beginning and 107.4 MB in the end (delta: 36.8 MB). Peak memory consumption was 37.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:05:27,446 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 179.3 MB. Free memory is still 160.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:05:27,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.88 ms. Allocated memory is still 179.3 MB. Free memory was 144.0 MB in the beginning and 161.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:05:27,446 INFO L168 Benchmark]: Boogie Preprocessor took 40.09 ms. Allocated memory is still 179.3 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:05:27,447 INFO L168 Benchmark]: RCFGBuilder took 329.59 ms. Allocated memory is still 179.3 MB. Free memory was 160.4 MB in the beginning and 143.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:05:27,447 INFO L168 Benchmark]: TraceAbstraction took 44330.23 ms. Allocated memory is still 179.3 MB. Free memory was 143.1 MB in the beginning and 107.4 MB in the end (delta: 35.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:05:27,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 179.3 MB. Free memory is still 160.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 161.88 ms. Allocated memory is still 179.3 MB. Free memory was 144.0 MB in the beginning and 161.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.09 ms. Allocated memory is still 179.3 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.59 ms. Allocated memory is still 179.3 MB. Free memory was 160.4 MB in the beginning and 143.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 44330.23 ms. Allocated memory is still 179.3 MB. Free memory was 143.1 MB in the beginning and 107.4 MB in the end (delta: 35.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(A>=0 && A<=10) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=10) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=10) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=10) [L26] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L37] COND FALSE !(!(r != 0)) [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND TRUE !(r > 0) [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND FALSE !(!(r < 0)) [L52] r = r + u [L53] u = u + 2 [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 44290.0ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 10.7ms, AutomataDifference: 30624.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 188 SDtfs, 192 SDslu, 990 SDs, 0 SdLazy, 1166 SolverSat, 80 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 30062.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 265 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7630.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=6, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 127.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.4ms SsaConstructionTime, 191.7ms SatisfiabilityAnalysisTime, 8420.2ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 261 ConstructedInterpolants, 24 QuantifiedInterpolants, 1660 SizeOfPredicates, 25 NumberOfNonLiveVariables, 760 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 162/228 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...