/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/bresenham-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:23:39,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:23:39,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:23:39,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:23:39,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:23:39,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:23:39,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:23:39,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:23:39,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:23:39,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:23:39,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:23:39,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:23:39,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:23:39,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:23:39,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:23:39,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:23:39,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:23:39,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:23:39,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:23:39,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:23:39,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 01:23:39,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:23:39,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:23:39,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:23:39,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:23:39,423 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:23:39,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:23:39,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:23:39,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:23:39,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:23:39,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:23:39,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:23:39,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:23:39,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:23:39,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:23:39,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:23:39,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:23:39,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:23:39,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:23:39,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:23:39,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:23:39,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:23:39,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:23:39,748 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:23:39,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-05-06 01:23:39,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e47c057/5efd1a989a204feaa0cf0d1a0145f846/FLAG953c75983 [2021-05-06 01:23:40,244 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:23:40,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2021-05-06 01:23:40,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e47c057/5efd1a989a204feaa0cf0d1a0145f846/FLAG953c75983 [2021-05-06 01:23:40,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0e47c057/5efd1a989a204feaa0cf0d1a0145f846 [2021-05-06 01:23:40,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:23:40,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:23:40,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:23:40,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:23:40,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:23:40,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ce853c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40, skipping insertion in model container [2021-05-06 01:23:40,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:23:40,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:23:40,439 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/bresenham-ll_unwindbound2.c[597,610] [2021-05-06 01:23:40,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:23:40,493 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:23:40,523 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/bresenham-ll_unwindbound2.c[597,610] [2021-05-06 01:23:40,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:23:40,554 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:23:40,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40 WrapperNode [2021-05-06 01:23:40,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:23:40,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:23:40,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:23:40,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:23:40,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... [2021-05-06 01:23:40,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:23:40,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:23:40,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:23:40,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:23:40,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:23:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:23:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:23:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:23:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:23:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:23:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:23:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:23:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:23:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:23:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:23:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:23:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:23:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:23:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:23:40,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:23:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:23:40,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:23:40,919 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 01:23:40,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:23:40 BoogieIcfgContainer [2021-05-06 01:23:40,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:23:40,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:23:40,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:23:40,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:23:40,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:23:40" (1/3) ... [2021-05-06 01:23:40,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438549ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:23:40, skipping insertion in model container [2021-05-06 01:23:40,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:40" (2/3) ... [2021-05-06 01:23:40,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438549ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:23:40, skipping insertion in model container [2021-05-06 01:23:40,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:23:40" (3/3) ... [2021-05-06 01:23:40,926 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2021-05-06 01:23:40,930 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:23:40,933 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:23:40,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:23:40,963 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:23:40,964 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:23:40,964 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:23:40,964 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:23:40,964 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:23:40,964 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:23:40,964 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:23:40,964 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:23:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:23:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 01:23:40,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:40,979 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:40,980 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:40,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2021-05-06 01:23:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541564572] [2021-05-06 01:23:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:23:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:41,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:41,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541564572] [2021-05-06 01:23:41,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541564572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:23:41,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:23:41,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:23:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210432091] [2021-05-06 01:23:41,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:23:41,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:23:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:23:41,283 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:23:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:41,341 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-06 01:23:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:23:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 01:23:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:41,348 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:23:41,348 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 01:23:41,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:23:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 01:23:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-06 01:23:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 01:23:41,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 01:23:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:41,378 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 01:23:41,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:23:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 01:23:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 01:23:41,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:41,379 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:41,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:23:41,379 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:41,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2021-05-06 01:23:41,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:41,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248917722] [2021-05-06 01:23:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:41,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:41,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165081556] [2021-05-06 01:23:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:23:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:41,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:41,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248917722] [2021-05-06 01:23:41,662 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:41,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165081556] [2021-05-06 01:23:41,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165081556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:23:41,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:23:41,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:23:41,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192736867] [2021-05-06 01:23:41,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:23:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:23:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:23:41,665 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:23:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:41,795 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 01:23:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:23:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 01:23:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:41,797 INFO L225 Difference]: With dead ends: 34 [2021-05-06 01:23:41,797 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 01:23:41,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:23:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 01:23:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 01:23:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 01:23:41,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-06 01:23:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:41,806 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 01:23:41,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:23:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 01:23:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 01:23:41,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:41,807 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:42,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:23:42,008 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2021-05-06 01:23:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:42,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275759006] [2021-05-06 01:23:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:42,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:42,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629602538] [2021-05-06 01:23:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 01:23:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:42,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:42,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:42,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275759006] [2021-05-06 01:23:42,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:42,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629602538] [2021-05-06 01:23:42,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629602538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:42,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:42,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:23:42,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290165247] [2021-05-06 01:23:42,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:23:42,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:23:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:23:42,259 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:42,383 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-05-06 01:23:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:23:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 01:23:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:42,387 INFO L225 Difference]: With dead ends: 44 [2021-05-06 01:23:42,387 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 01:23:42,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:23:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 01:23:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 01:23:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:23:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 01:23:42,401 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-06 01:23:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:42,402 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 01:23:42,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 01:23:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 01:23:42,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:42,403 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:42,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:42,617 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 1 times [2021-05-06 01:23:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:42,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128162738] [2021-05-06 01:23:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:42,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275441166] [2021-05-06 01:23:42,632 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 [2021-05-06 01:23:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 01:23:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:42,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:42,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128162738] [2021-05-06 01:23:42,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:42,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275441166] [2021-05-06 01:23:42,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275441166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:42,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:42,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 01:23:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393022536] [2021-05-06 01:23:42,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:23:42,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:23:42,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:23:42,834 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:42,967 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-06 01:23:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:23:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 01:23:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:42,968 INFO L225 Difference]: With dead ends: 53 [2021-05-06 01:23:42,968 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 01:23:42,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:23:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 01:23:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-06 01:23:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 01:23:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 01:23:42,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-06 01:23:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:42,976 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 01:23:42,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 01:23:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:23:42,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:42,977 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:43,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:43,190 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2021-05-06 01:23:43,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:43,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669645262] [2021-05-06 01:23:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:43,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:43,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391102775] [2021-05-06 01:23:43,208 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 [2021-05-06 01:23:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:23:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:43,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:43,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:43,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669645262] [2021-05-06 01:23:43,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:43,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391102775] [2021-05-06 01:23:43,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391102775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:43,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:43,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 01:23:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006039673] [2021-05-06 01:23:43,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:23:43,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:23:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:23:43,360 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:43,393 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-06 01:23:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:23:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-06 01:23:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:43,397 INFO L225 Difference]: With dead ends: 54 [2021-05-06 01:23:43,397 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 01:23:43,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:23:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 01:23:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 01:23:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 01:23:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 01:23:43,412 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-06 01:23:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:43,412 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 01:23:43,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 01:23:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 01:23:43,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:43,414 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:43,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:43,614 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2021-05-06 01:23:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:43,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103059669] [2021-05-06 01:23:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:43,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:43,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480543224] [2021-05-06 01:23:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 01:23:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 01:23:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:43,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 01:23:43,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103059669] [2021-05-06 01:23:43,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480543224] [2021-05-06 01:23:43,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480543224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:43,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:43,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 01:23:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845768610] [2021-05-06 01:23:43,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 01:23:43,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 01:23:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 01:23:43,926 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:44,171 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-05-06 01:23:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 01:23:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-06 01:23:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:44,173 INFO L225 Difference]: With dead ends: 57 [2021-05-06 01:23:44,173 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 01:23:44,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 01:23:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 01:23:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-06 01:23:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:23:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 01:23:44,178 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-06 01:23:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:44,178 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 01:23:44,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 01:23:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:23:44,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:44,179 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:44,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 01:23:44,393 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 2 times [2021-05-06 01:23:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419667185] [2021-05-06 01:23:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:44,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:44,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857819591] [2021-05-06 01:23:44,403 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 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 [2021-05-06 01:23:44,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:23:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:23:44,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:23:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:44,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:44,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419667185] [2021-05-06 01:23:44,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:44,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857819591] [2021-05-06 01:23:44,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857819591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:44,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:44,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:23:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907513530] [2021-05-06 01:23:44,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:23:44,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:23:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:23:44,560 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:44,600 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 01:23:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:23:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-06 01:23:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:44,602 INFO L225 Difference]: With dead ends: 50 [2021-05-06 01:23:44,603 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 01:23:44,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:23:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 01:23:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 01:23:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-06 01:23:44,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2021-05-06 01:23:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:44,607 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-06 01:23:44,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-06 01:23:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 01:23:44,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:44,608 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:44,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:44,821 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1756989579, now seen corresponding path program 1 times [2021-05-06 01:23:44,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:44,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455462895] [2021-05-06 01:23:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:44,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:44,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174230168] [2021-05-06 01:23:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 01:23:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:45,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:45,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:45,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:45,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 01:23:45,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:45,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455462895] [2021-05-06 01:23:45,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:45,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174230168] [2021-05-06 01:23:45,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174230168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:45,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:45,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 01:23:45,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997115793] [2021-05-06 01:23:45,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 01:23:45,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:45,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 01:23:45,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:23:45,114 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 13 states, 10 states have (on average 2.5) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:45,341 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-06 01:23:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 01:23:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-05-06 01:23:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:45,342 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:23:45,342 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 01:23:45,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-06 01:23:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 01:23:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 01:23:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 01:23:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 01:23:45,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-05-06 01:23:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:45,343 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 01:23:45,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 01:23:45,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 01:23:45,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:45,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 01:23:45,889 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-06 01:23:45,890 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-06 01:23:45,890 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-06 01:23:45,890 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-06 01:23:45,891 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:23:45,891 INFO L198 CegarLoopUtils]: For program point L31-1(lines 31 46) no Hoare annotation was computed. [2021-05-06 01:23:45,892 INFO L194 CegarLoopUtils]: At program point L31-3(lines 31 46) the Hoare annotation is: (let ((.cse3 (+ main_~v~0 main_~X~0)) (.cse2 (= main_~y~0 0))) (or (and (<= 1 ~counter~0) (let ((.cse0 (* main_~Y~0 4)) (.cse1 (= main_~x~0 1))) (or (and (<= main_~X~0 (* 2 main_~Y~0)) (= .cse0 (+ main_~v~0 (* main_~X~0 3))) (= main_~y~0 1) (<= 0 main_~X~0) .cse1) (and .cse2 (= .cse3 .cse0) .cse1)))) (not (<= |old(~counter~0)| 0)) (and (= .cse3 (* main_~Y~0 2)) .cse2 (<= ~counter~0 0) (= main_~x~0 0) (<= 0 ~counter~0)) (not (<= 0 |old(~counter~0)|)) (<= 2 ~counter~0))) [2021-05-06 01:23:45,892 INFO L198 CegarLoopUtils]: For program point L31-4(lines 31 46) no Hoare annotation was computed. [2021-05-06 01:23:45,892 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2021-05-06 01:23:45,892 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2021-05-06 01:23:45,892 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse2 (+ main_~v~0 main_~X~0)) (.cse1 (= main_~y~0 0)) (.cse4 (= main_~xy~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) (let ((.cse0 (= main_~Y~0 main_~yx~0)) (.cse3 (* main_~Y~0 4)) (.cse5 (= main_~x~0 1))) (or (and .cse0 .cse1 (= .cse2 .cse3) .cse4 .cse5) (and .cse0 (<= main_~X~0 (* 2 main_~Y~0)) (= .cse3 (+ main_~v~0 (* main_~X~0 3))) (= main_~y~0 1) (<= 0 main_~X~0) (= (* main_~X~0 main_~y~0) main_~xy~0) .cse5)))) (not (<= 0 |old(~counter~0)|)) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~yx~0 0) (= .cse2 (* main_~Y~0 2)) .cse1 (= main_~x~0 0) .cse4))) [2021-05-06 01:23:45,892 INFO L198 CegarLoopUtils]: For program point L34-1(lines 31 46) no Hoare annotation was computed. [2021-05-06 01:23:45,892 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 52) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 01:23:45,894 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~Y~0 main_~yx~0)) (.cse4 (= main_~x~0 1)) (.cse2 (+ main_~v~0 main_~X~0)) (.cse5 (* main_~Y~0 2)) (.cse1 (= main_~y~0 0)) (.cse3 (= main_~xy~0 0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (= .cse2 (* main_~Y~0 4)) .cse3 .cse4) (and .cse0 (= main_~y~0 1) (<= 0 main_~X~0) (< main_~X~0 main_~x~0) (= (+ .cse5 (* (* main_~x~0 main_~Y~0) 2)) (+ main_~v~0 main_~X~0 (* (* main_~X~0 main_~y~0) 2))) (= main_~y~0 main_~xy~0) .cse4) (not (<= 0 |old(~counter~0)|)) (and (= main_~yx~0 0) (= .cse2 .cse5) .cse1 (= main_~x~0 0) .cse3) (<= 2 ~counter~0))) [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L39(lines 39 44) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L39-2(lines 39 44) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:23:45,894 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-06 01:23:45,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:23:45 BoogieIcfgContainer [2021-05-06 01:23:45,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:23:45,908 INFO L168 Benchmark]: Toolchain (without parser) took 5632.97 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 142.8 MB in the beginning and 124.1 MB in the end (delta: 18.6 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:45,908 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 180.4 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:23:45,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.88 ms. Allocated memory is still 180.4 MB. Free memory was 142.6 MB in the beginning and 162.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:45,908 INFO L168 Benchmark]: Boogie Preprocessor took 36.83 ms. Allocated memory is still 180.4 MB. Free memory was 162.2 MB in the beginning and 160.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:45,908 INFO L168 Benchmark]: RCFGBuilder took 327.52 ms. Allocated memory is still 180.4 MB. Free memory was 160.8 MB in the beginning and 144.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:45,909 INFO L168 Benchmark]: TraceAbstraction took 4985.77 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.0 MB in the beginning and 124.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 58.1 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:45,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 180.4 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.88 ms. Allocated memory is still 180.4 MB. Free memory was 142.6 MB in the beginning and 162.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.83 ms. Allocated memory is still 180.4 MB. Free memory was 162.2 MB in the beginning and 160.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 327.52 ms. Allocated memory is still 180.4 MB. Free memory was 160.8 MB in the beginning and 144.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4985.77 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.0 MB in the beginning and 124.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 58.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4600.3ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 10.6ms, AutomataDifference: 1034.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 326.9ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 166 SDtfs, 92 SDslu, 671 SDs, 0 SdLazy, 727 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 469.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 758.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 33 NumberOfFragments, 311 HoareAnnotationTreeSize, 20 FomulaSimplifications, 181 FormulaSimplificationTreeSizeReduction, 64.1ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 313 FormulaSimplificationTreeSizeReductionInter, 255.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 75.1ms SsaConstructionTime, 223.2ms SatisfiabilityAnalysisTime, 1294.9ms InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1115 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1003 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 38/64 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: ((((1 <= counter && (((((X <= 2 * Y && Y * 4 == v + X * 3) && y == 1) && 0 <= X) && x == 1) || ((y == 0 && v + X == Y * 4) && x == 1))) || !(\old(counter) <= 0)) || ((((v + X == Y * 2 && y == 0) && counter <= 0) && x == 0) && 0 <= counter)) || !(0 <= \old(counter))) || 2 <= counter RESULT: Ultimate proved your program to be correct! Received shutdown request...