/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/egcd2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:49:43,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:49:43,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:49:44,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:49:44,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:49:44,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:49:44,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:49:44,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:49:44,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:49:44,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:49:44,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:49:44,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:49:44,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:49:44,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:49:44,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:49:44,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:49:44,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:49:44,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:49:44,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:49:44,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:49:44,055 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 14:49:44,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:49:44,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:49:44,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:49:44,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:49:44,095 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:49:44,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:49:44,096 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:49:44,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:49:44,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:49:44,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:49:44,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:49:44,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:49:44,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:49:44,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:49:44,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:49:44,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:49:44,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:49:44,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:49:44,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:49:44,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:49:44,355 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:49:44,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-05-02 14:49:44,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8461bb9/e6e0cfd8cdfe4edf813aabae6408c653/FLAG0f668a432 [2021-05-02 14:49:44,770 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:49:44,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-05-02 14:49:44,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8461bb9/e6e0cfd8cdfe4edf813aabae6408c653/FLAG0f668a432 [2021-05-02 14:49:45,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8461bb9/e6e0cfd8cdfe4edf813aabae6408c653 [2021-05-02 14:49:45,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:49:45,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:49:45,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:45,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:49:45,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:49:45,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28baf2a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45, skipping insertion in model container [2021-05-02 14:49:45,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:49:45,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:49:45,275 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/egcd2-ll_unwindbound1.c[490,503] [2021-05-02 14:49:45,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:45,291 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:49:45,298 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/egcd2-ll_unwindbound1.c[490,503] [2021-05-02 14:49:45,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:45,312 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:49:45,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45 WrapperNode [2021-05-02 14:49:45,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:45,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:49:45,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:49:45,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:49:45,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (1/1) ... [2021-05-02 14:49:45,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:49:45,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:49:45,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:49:45,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:49:45,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (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 14:49:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:49:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:49:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:49:45,483 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:49:45,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:49:45,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:49:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:49:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:49:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:49:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:49:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:49:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:49:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:49:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:49:45,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:49:45,744 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:49:45,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:45 BoogieIcfgContainer [2021-05-02 14:49:45,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:49:45,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:49:45,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:49:45,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:49:45,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:49:45" (1/3) ... [2021-05-02 14:49:45,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d887b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:45, skipping insertion in model container [2021-05-02 14:49:45,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:45" (2/3) ... [2021-05-02 14:49:45,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d887b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:45, skipping insertion in model container [2021-05-02 14:49:45,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:45" (3/3) ... [2021-05-02 14:49:45,749 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2021-05-02 14:49:45,753 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:49:45,755 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:49:45,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:49:45,795 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:49:45,795 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:49:45,795 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:49:45,795 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:49:45,795 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:49:45,795 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:49:45,795 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:49:45,796 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:49:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:49:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 14:49:45,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:45,813 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] [2021-05-02 14:49:45,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-02 14:49:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:45,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819960223] [2021-05-02 14:49:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:49:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:49:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:49:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:49:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:49:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,025 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 14:49:46,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:46,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819960223] [2021-05-02 14:49:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819960223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:46,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:46,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:49:46,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329136646] [2021-05-02 14:49:46,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:49:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:49:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:46,039 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 14:49:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:46,132 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-02 14:49:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:49:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 32 [2021-05-02 14:49:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:46,156 INFO L225 Difference]: With dead ends: 72 [2021-05-02 14:49:46,156 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:49:46,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:49:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 14:49:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 14:49:46,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 14:49:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:46,183 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 14:49:46,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 14:49:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 14:49:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:49:46,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:46,184 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 14:49:46,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:49:46,185 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-02 14:49:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940897469] [2021-05-02 14:49:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:46,196 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:46,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231580329] [2021-05-02 14:49:46,197 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 14:49:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:49:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:46,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,427 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 14:49:46,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940897469] [2021-05-02 14:49:46,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231580329] [2021-05-02 14:49:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231580329] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:46,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:46,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:49:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026333661] [2021-05-02 14:49:46,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:49:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:49:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:49:46,430 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:46,449 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-02 14:49:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:49:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:49:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:46,454 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:49:46,454 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:49:46,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:49:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:49:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 14:49:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 14:49:46,462 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 14:49:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:46,463 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 14:49:46,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 14:49:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:49:46,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:46,464 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, 1] [2021-05-02 14:49:46,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:49:46,680 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-02 14:49:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135506723] [2021-05-02 14:49:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:46,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:46,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091930155] [2021-05-02 14:49:46,691 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 14:49:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:49:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:49:46,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:46,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135506723] [2021-05-02 14:49:46,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:46,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091930155] [2021-05-02 14:49:46,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091930155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:46,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:46,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:49:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829239660] [2021-05-02 14:49:46,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:49:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:49:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:46,837 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:46,908 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-02 14:49:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:49:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:49:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:46,911 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:49:46,911 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 14:49:46,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 14:49:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 14:49:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:49:46,930 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 14:49:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:46,930 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:49:46,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:49:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:49:46,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:46,932 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, 1, 1, 1] [2021-05-02 14:49:47,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,148 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-02 14:49:47,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:47,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204474039] [2021-05-02 14:49:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:47,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:47,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911640643] [2021-05-02 14:49:47,181 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 14:49:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:49:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:47,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,358 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 14:49:47,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204474039] [2021-05-02 14:49:47,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911640643] [2021-05-02 14:49:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911640643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:47,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:47,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:49:47,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259361276] [2021-05-02 14:49:47,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:49:47,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:49:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:49:47,360 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:47,389 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 14:49:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:49:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 14:49:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:47,390 INFO L225 Difference]: With dead ends: 51 [2021-05-02 14:49:47,391 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:49:47,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:49:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:49:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:49:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 14:49:47,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 36 [2021-05-02 14:49:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:47,395 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 14:49:47,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 14:49:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:49:47,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:47,396 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 14:49:47,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,611 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-02 14:49:47,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:47,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915012317] [2021-05-02 14:49:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:47,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:47,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667182266] [2021-05-02 14:49:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:49:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:49:47,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:49:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:49:47,711 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:49:47,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:49:47,773 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:49:47,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:48,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:49:48 BoogieIcfgContainer [2021-05-02 14:49:48,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:49:48,015 INFO L168 Benchmark]: Toolchain (without parser) took 2846.93 ms. Allocated memory was 184.5 MB in the beginning and 252.7 MB in the end (delta: 68.2 MB). Free memory was 150.2 MB in the beginning and 176.2 MB in the end (delta: -26.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:48,015 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 184.5 MB. Free memory is still 166.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:49:48,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.89 ms. Allocated memory is still 184.5 MB. Free memory was 150.0 MB in the beginning and 139.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:48,015 INFO L168 Benchmark]: Boogie Preprocessor took 58.15 ms. Allocated memory is still 184.5 MB. Free memory was 139.1 MB in the beginning and 167.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:48,015 INFO L168 Benchmark]: RCFGBuilder took 373.53 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 150.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:48,015 INFO L168 Benchmark]: TraceAbstraction took 2268.21 ms. Allocated memory was 184.5 MB in the beginning and 252.7 MB in the end (delta: 68.2 MB). Free memory was 150.0 MB in the beginning and 176.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:48,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 184.5 MB. Free memory is still 166.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 132.89 ms. Allocated memory is still 184.5 MB. Free memory was 150.0 MB in the beginning and 139.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.15 ms. Allocated memory is still 184.5 MB. Free memory was 139.1 MB in the beginning and 167.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 373.53 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 150.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2268.21 ms. Allocated memory was 184.5 MB in the beginning and 252.7 MB in the end (delta: 68.2 MB). Free memory was 150.0 MB in the beginning and 176.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=9, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] COND TRUE counter++<1 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=1, b=1, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] COND FALSE !(counter++<1) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=1, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=1, y=1, yy=1] [L40] COND FALSE !(counter++<1) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2195.9ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 10.0ms, AutomataDifference: 262.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 157 SDtfs, 51 SDslu, 231 SDs, 0 SdLazy, 101 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.3ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.1ms SsaConstructionTime, 138.6ms SatisfiabilityAnalysisTime, 456.9ms InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 5 NumberOfNonLiveVariables, 489 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 90/96 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...