/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/egcd-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:22:58,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:22:58,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:22:58,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:22:58,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:22:58,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:22:58,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:22:58,878 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 02:22:58,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:22:58,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:22:58,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:22:58,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:22:58,910 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:22:58,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:22:58,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:22:58,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:22:58,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:22:58,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:22:58,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:22:58,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:22:58,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:22:58,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:22:58,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:22:58,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:22:58,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:22:58,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:22:58,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:22:58,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:22:58,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:22:58,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:22:58,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:22:58,941 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:22:59,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:22:59,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:22:59,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:22:59,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:22:59,429 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:22:59,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-06 02:22:59,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef12e687/4487349eed3c4f778260926ecb2f3087/FLAGc93d5bbc0 [2021-05-06 02:23:00,102 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:23:00,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-06 02:23:00,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef12e687/4487349eed3c4f778260926ecb2f3087/FLAGc93d5bbc0 [2021-05-06 02:23:00,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ef12e687/4487349eed3c4f778260926ecb2f3087 [2021-05-06 02:23:00,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:23:00,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:23:00,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:23:00,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:23:00,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:23:00,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600f705f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00, skipping insertion in model container [2021-05-06 02:23:00,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:23:00,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:23:00,616 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/egcd-ll_unwindbound2.c[489,502] [2021-05-06 02:23:00,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:23:00,637 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:23:00,661 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/egcd-ll_unwindbound2.c[489,502] [2021-05-06 02:23:00,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:23:00,694 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:23:00,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00 WrapperNode [2021-05-06 02:23:00,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:23:00,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:23:00,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:23:00,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:23:00,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (1/1) ... [2021-05-06 02:23:00,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:23:00,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:23:00,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:23:00,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:23:00,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (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 02:23:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:23:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:23:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:23:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:23:00,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:23:00,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:23:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:23:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:23:00,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:23:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:23:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:23:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:23:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:23:00,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:23:00,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:23:01,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:23:01,099 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:23:01,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:23:01 BoogieIcfgContainer [2021-05-06 02:23:01,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:23:01,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:23:01,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:23:01,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:23:01,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:23:00" (1/3) ... [2021-05-06 02:23:01,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52402217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:23:01, skipping insertion in model container [2021-05-06 02:23:01,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:23:00" (2/3) ... [2021-05-06 02:23:01,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52402217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:23:01, skipping insertion in model container [2021-05-06 02:23:01,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:23:01" (3/3) ... [2021-05-06 02:23:01,104 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.c [2021-05-06 02:23:01,108 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:23:01,110 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:23:01,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:23:01,133 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:23:01,133 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:23:01,133 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:23:01,133 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:23:01,133 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:23:01,133 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:23:01,133 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:23:01,133 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:23:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:23:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:23:01,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:01,147 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:01,148 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:01,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:23:01,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:01,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775384018] [2021-05-06 02:23:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:23:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:23:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:23:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:01,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:01,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775384018] [2021-05-06 02:23:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775384018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:01,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:01,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:23:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150535753] [2021-05-06 02:23:01,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:23:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:23:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:23:01,313 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:01,478 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:23:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:23:01,480 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:23:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:01,485 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:23:01,485 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:23:01,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:23:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:23:01,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:23:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:23:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:23:01,548 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:23:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:23:01,549 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:23:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:23:01,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:01,550 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:01,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:23:01,550 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:23:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:01,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336874125] [2021-05-06 02:23:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:23:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:23:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:23:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:01,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336874125] [2021-05-06 02:23:01,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336874125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:01,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:01,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:01,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497181900] [2021-05-06 02:23:01,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:01,729 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:01,895 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:23:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:23:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:23:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:01,896 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:23:01,896 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:23:01,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:23:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:23:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:23:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:23:01,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:23:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:01,904 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:23:01,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:23:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:23:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:23:01,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:01,905 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:01,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:23:01,906 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:01,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:23:01,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:01,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624412728] [2021-05-06 02:23:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:01,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:01,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533047494] [2021-05-06 02:23:01,915 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 02:23:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:23:01,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:02,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:23:02,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:02,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624412728] [2021-05-06 02:23:02,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:02,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533047494] [2021-05-06 02:23:02,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533047494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:02,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:02,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:02,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122984654] [2021-05-06 02:23:02,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:02,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:02,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:02,075 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:23:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:02,124 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:23:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:02,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:23:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:02,125 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:23:02,125 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:23:02,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:23:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:23:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:23:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:23:02,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:23:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:02,133 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:23:02,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:23:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:23:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:23:02,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:02,134 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:02,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:23:02,341 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:02,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:23:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:02,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726557378] [2021-05-06 02:23:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:02,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:02,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116727960] [2021-05-06 02:23:02,356 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 02:23:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:23:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:02,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:23:02,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726557378] [2021-05-06 02:23:02,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116727960] [2021-05-06 02:23:02,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116727960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:02,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:02,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:23:02,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546882244] [2021-05-06 02:23:02,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:02,750 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:23:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:02,970 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:23:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:02,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:23:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:02,973 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:23:02,973 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:23:02,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:23:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:23:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:23:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:23:02,997 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:23:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:02,998 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:23:02,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:23:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:23:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:23:02,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:02,999 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:03,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:03,209 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:23:03,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:03,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861991827] [2021-05-06 02:23:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:03,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:03,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769329449] [2021-05-06 02:23:03,219 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 02:23:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:23:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:23:03,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861991827] [2021-05-06 02:23:03,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769329449] [2021-05-06 02:23:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769329449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:03,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:03,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43510524] [2021-05-06 02:23:03,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:03,353 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:23:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:03,390 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:23:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:03,391 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:23:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:03,392 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:23:03,392 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:23:03,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:23:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:23:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:23:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:23:03,400 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:23:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:03,400 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:23:03,400 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:23:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:23:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:23:03,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:03,401 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:03,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:03,618 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:23:03,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:03,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044317137] [2021-05-06 02:23:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:03,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:03,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424994774] [2021-05-06 02:23:03,626 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 02:23:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:03,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:23:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:23:03,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044317137] [2021-05-06 02:23:03,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424994774] [2021-05-06 02:23:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424994774] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:03,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:03,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:03,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081672835] [2021-05-06 02:23:03,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:03,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:03,738 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:23:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:03,780 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:23:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:23:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:03,781 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:23:03,781 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:23:03,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:23:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:23:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:23:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:23:03,789 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:23:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:03,789 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:23:03,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:23:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:23:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:23:03,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:03,790 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:04,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:04,008 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:23:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075992024] [2021-05-06 02:23:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:04,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:04,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013378151] [2021-05-06 02:23:04,016 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 02:23:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:04,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:23:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:23:04,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:04,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075992024] [2021-05-06 02:23:04,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:04,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013378151] [2021-05-06 02:23:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013378151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:23:04,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077494682] [2021-05-06 02:23:04,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:04,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:04,158 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:23:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:04,193 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:23:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:23:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:23:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:04,194 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:23:04,194 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:23:04,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:23:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:23:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:23:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:23:04,203 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:23:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:04,203 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:23:04,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:23:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:23:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:23:04,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:04,204 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:04,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:23:04,421 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:23:04,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:04,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747364723] [2021-05-06 02:23:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:04,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:04,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017470891] [2021-05-06 02:23:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:23:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:23:04,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:04,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747364723] [2021-05-06 02:23:04,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:04,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017470891] [2021-05-06 02:23:04,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017470891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:23:04,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:23:04,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:23:04,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322695385] [2021-05-06 02:23:04,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:23:04,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:04,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:23:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:23:04,558 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:04,593 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:23:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:23:04,594 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 02:23:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:04,595 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:23:04,595 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:23:04,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:23:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:23:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:23:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:23:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:23:04,603 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:23:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:04,603 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:23:04,604 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:23:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:23:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:23:04,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:04,604 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:04,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:04,826 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:23:04,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:04,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544351376] [2021-05-06 02:23:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:04,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:04,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028243725] [2021-05-06 02:23:04,834 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 02:23:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:23:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:04,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:23:04,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544351376] [2021-05-06 02:23:04,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:04,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028243725] [2021-05-06 02:23:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028243725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:23:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898519911] [2021-05-06 02:23:04,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:04,963 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:05,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:05,087 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:23:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 02:23:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:05,088 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:23:05,088 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:23:05,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:23:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:23:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:23:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:23:05,099 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:23:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:05,100 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:23:05,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:23:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:23:05,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:05,116 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:05,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:05,318 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:23:05,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:05,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906560077] [2021-05-06 02:23:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:05,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:05,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889825860] [2021-05-06 02:23:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:23:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:23:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:05,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:23:05,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906560077] [2021-05-06 02:23:05,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889825860] [2021-05-06 02:23:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889825860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:05,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:05,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:23:05,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119367777] [2021-05-06 02:23:05,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:23:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:23:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:23:05,617 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:05,777 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:23:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:23:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:23:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:05,782 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:23:05,782 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:23:05,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:23:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:23:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:23:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:23:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:23:05,813 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:23:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:05,813 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:23:05,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:23:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:23:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:23:05,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:05,816 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:06,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:23:06,037 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:23:06,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:06,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525207317] [2021-05-06 02:23:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:06,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:06,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761260149] [2021-05-06 02:23:06,048 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:06,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:23:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:23:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:23:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:23:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:23:06,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:23:06,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525207317] [2021-05-06 02:23:06,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:23:06,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761260149] [2021-05-06 02:23:06,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761260149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:23:06,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:23:06,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:23:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569917631] [2021-05-06 02:23:06,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:23:06,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:23:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:23:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:23:06,240 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:23:06,405 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:23:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:23:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:23:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:23:06,406 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:23:06,406 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:23:06,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:23:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:23:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:23:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:23:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:23:06,419 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:23:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:23:06,419 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:23:06,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:23:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:23:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:23:06,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:23:06,420 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:23:06,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:06,640 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:23:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:23:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:23:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:23:06,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953666970] [2021-05-06 02:23:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:23:06,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:23:06,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082917636] [2021-05-06 02:23:06,647 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:06,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:23:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 02:23:06,736 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:23:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:23:06,760 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:23:06,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:23:06,805 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:23:07,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:23:07,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:23:07 BoogieIcfgContainer [2021-05-06 02:23:07,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:23:07,105 INFO L168 Benchmark]: Toolchain (without parser) took 6622.54 ms. Allocated memory was 200.3 MB in the beginning and 288.4 MB in the end (delta: 88.1 MB). Free memory was 164.8 MB in the beginning and 236.8 MB in the end (delta: -71.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:23:07,105 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 200.3 MB. Free memory is still 181.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:23:07,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.03 ms. Allocated memory is still 200.3 MB. Free memory was 164.7 MB in the beginning and 182.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:23:07,105 INFO L168 Benchmark]: Boogie Preprocessor took 42.62 ms. Allocated memory is still 200.3 MB. Free memory was 182.8 MB in the beginning and 181.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:23:07,105 INFO L168 Benchmark]: RCFGBuilder took 360.84 ms. Allocated memory is still 200.3 MB. Free memory was 181.2 MB in the beginning and 165.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:23:07,105 INFO L168 Benchmark]: TraceAbstraction took 6003.13 ms. Allocated memory was 200.3 MB in the beginning and 288.4 MB in the end (delta: 88.1 MB). Free memory was 165.0 MB in the beginning and 236.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 17.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:23:07,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 200.3 MB. Free memory is still 181.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 208.03 ms. Allocated memory is still 200.3 MB. Free memory was 164.7 MB in the beginning and 182.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.62 ms. Allocated memory is still 200.3 MB. Free memory was 182.8 MB in the beginning and 181.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.84 ms. Allocated memory is still 200.3 MB. Free memory was 181.2 MB in the beginning and 165.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6003.13 ms. Allocated memory was 200.3 MB in the beginning and 288.4 MB in the end (delta: 88.1 MB). Free memory was 165.0 MB in the beginning and 236.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 17.9 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)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [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=4, 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=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5902.8ms, OverallIterations: 12, TraceHistogramMax: 7, EmptinessCheckTime: 13.1ms, AutomataDifference: 1258.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 431 SDtfs, 144 SDslu, 1207 SDs, 0 SdLazy, 742 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 709.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 456.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=11, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 158.0ms AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.1ms SsaConstructionTime, 310.6ms SatisfiabilityAnalysisTime, 1209.4ms InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 1254 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1478 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 211/236 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...