/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:23,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:23,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:23,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:23,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:05:23,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:05:23,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:05:23,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:05:23,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:05:23,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:05:23,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:05:23,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:05:23,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:05:23,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:05:23,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:05:23,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:05:23,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:05:23,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:23,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:23,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:23,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:23,888 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:23,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:23,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:23,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:23,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:23,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:23,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:23,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:23,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:23,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:23,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:23,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:23,890 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:23,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:23,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:23,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:23,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:23,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:23,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:23,892 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:24,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:24,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:24,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:24,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:24,319 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:24,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-23 23:05:24,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314253dc5/48f9c26138e940a8bfe363fd48390400/FLAGdd3a6d0a1 [2021-02-23 23:05:24,974 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:24,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-23 23:05:24,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314253dc5/48f9c26138e940a8bfe363fd48390400/FLAGdd3a6d0a1 [2021-02-23 23:05:25,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314253dc5/48f9c26138e940a8bfe363fd48390400 [2021-02-23 23:05:25,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:25,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:25,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:25,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:25,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:25,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5984c73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25, skipping insertion in model container [2021-02-23 23:05:25,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:25,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:25,573 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-23 23:05:25,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:25,588 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:25,610 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-23 23:05:25,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:25,634 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:25,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25 WrapperNode [2021-02-23 23:05:25,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:25,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:25,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:25,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:25,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (1/1) ... [2021-02-23 23:05:25,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:25,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:25,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:25,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:25,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (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 [2021-02-23 23:05:25,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:25,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:25,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2021-02-23 23:05:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-02-23 23:05:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-23 23:05:25,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:05:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 23:05:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 23:05:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-02-23 23:05:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 23:05:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:26,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:26,472 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 23:05:26,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:26 BoogieIcfgContainer [2021-02-23 23:05:26,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:26,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:26,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:26,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:26,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:25" (1/3) ... [2021-02-23 23:05:26,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e5a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:26, skipping insertion in model container [2021-02-23 23:05:26,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:25" (2/3) ... [2021-02-23 23:05:26,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e5a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:26, skipping insertion in model container [2021-02-23 23:05:26,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:26" (3/3) ... [2021-02-23 23:05:26,485 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2021-02-23 23:05:26,492 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:26,497 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:05:26,518 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:05:26,546 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:05:26,546 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:05:26,546 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:05:26,546 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:05:26,546 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:05:26,547 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:05:26,547 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:05:26,547 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:05:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2021-02-23 23:05:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:05:26,579 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:26,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:26,581 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -895331749, now seen corresponding path program 1 times [2021-02-23 23:05:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:26,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557930695] [2021-02-23 23:05:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:26,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:26,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:26,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:26,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-23 23:05:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-23 23:05:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-23 23:05:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-23 23:05:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-23 23:05:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:27,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:27,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-23 23:05:27,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557930695] [2021-02-23 23:05:27,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:27,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:05:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73100275] [2021-02-23 23:05:27,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:05:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:05:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:05:27,214 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2021-02-23 23:05:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:27,828 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-02-23 23:05:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 23:05:27,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 23:05:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:27,854 INFO L225 Difference]: With dead ends: 113 [2021-02-23 23:05:27,854 INFO L226 Difference]: Without dead ends: 84 [2021-02-23 23:05:27,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:05:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-23 23:05:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-23 23:05:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-23 23:05:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-02-23 23:05:27,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 88 [2021-02-23 23:05:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-02-23 23:05:27,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:05:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-02-23 23:05:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 23:05:27,963 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:27,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:27,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:05:27,964 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1230444656, now seen corresponding path program 1 times [2021-02-23 23:05:27,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:27,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608279620] [2021-02-23 23:05:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:28,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-23 23:05:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-23 23:05:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-23 23:05:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-23 23:05:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-02-23 23:05:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-23 23:05:28,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608279620] [2021-02-23 23:05:28,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:28,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 23:05:28,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032384323] [2021-02-23 23:05:28,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 23:05:28,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:28,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 23:05:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:05:28,244 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 5 states. [2021-02-23 23:05:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:28,743 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-02-23 23:05:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 23:05:28,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2021-02-23 23:05:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:28,746 INFO L225 Difference]: With dead ends: 111 [2021-02-23 23:05:28,746 INFO L226 Difference]: Without dead ends: 84 [2021-02-23 23:05:28,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:05:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-23 23:05:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-23 23:05:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-23 23:05:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-02-23 23:05:28,789 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 90 [2021-02-23 23:05:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:28,790 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-02-23 23:05:28,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 23:05:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-02-23 23:05:28,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 23:05:28,793 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:28,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:28,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:05:28,794 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:28,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1239221587, now seen corresponding path program 1 times [2021-02-23 23:05:28,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:28,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341125997] [2021-02-23 23:05:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:28,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:28,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:28,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:28,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:28,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:28,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 23:05:29,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:05:29,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:05:29,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-23 23:05:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-23 23:05:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-23 23:05:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-23 23:05:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-23 23:05:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:29,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:29,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 23:05:29,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341125997] [2021-02-23 23:05:29,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:05:29,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 23:05:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878070126] [2021-02-23 23:05:29,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 23:05:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 23:05:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-02-23 23:05:29,259 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 14 states. [2021-02-23 23:05:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:31,176 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2021-02-23 23:05:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:05:31,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2021-02-23 23:05:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:31,181 INFO L225 Difference]: With dead ends: 172 [2021-02-23 23:05:31,181 INFO L226 Difference]: Without dead ends: 158 [2021-02-23 23:05:31,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-02-23 23:05:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-23 23:05:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-02-23 23:05:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-23 23:05:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-02-23 23:05:31,232 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 92 [2021-02-23 23:05:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:31,236 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-02-23 23:05:31,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 23:05:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-02-23 23:05:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 23:05:31,247 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:31,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1] [2021-02-23 23:05:31,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:05:31,248 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:31,248 INFO L82 PathProgramCache]: Analyzing trace with hash 353520397, now seen corresponding path program 1 times [2021-02-23 23:05:31,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:31,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660367045] [2021-02-23 23:05:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:05:31,328 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:05:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:05:31,360 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:05:31,404 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:05:31,405 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:05:31,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:05:31,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:31 BoogieIcfgContainer [2021-02-23 23:05:31,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:05:31,512 INFO L168 Benchmark]: Toolchain (without parser) took 6162.52 ms. Allocated memory was 168.8 MB in the beginning and 228.6 MB in the end (delta: 59.8 MB). Free memory was 144.5 MB in the beginning and 162.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 42.7 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:31,513 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 168.8 MB. Free memory is still 155.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:05:31,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.29 ms. Allocated memory is still 168.8 MB. Free memory was 143.4 MB in the beginning and 133.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:31,514 INFO L168 Benchmark]: Boogie Preprocessor took 49.31 ms. Allocated memory is still 168.8 MB. Free memory was 132.9 MB in the beginning and 131.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:31,516 INFO L168 Benchmark]: RCFGBuilder took 787.91 ms. Allocated memory is still 168.8 MB. Free memory was 131.2 MB in the beginning and 135.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:31,517 INFO L168 Benchmark]: TraceAbstraction took 5033.98 ms. Allocated memory was 168.8 MB in the beginning and 228.6 MB in the end (delta: 59.8 MB). Free memory was 134.7 MB in the beginning and 162.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:31,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 168.8 MB. Free memory is still 155.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.29 ms. Allocated memory is still 168.8 MB. Free memory was 143.4 MB in the beginning and 133.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.31 ms. Allocated memory is still 168.8 MB. Free memory was 132.9 MB in the beginning and 131.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 787.91 ms. Allocated memory is still 168.8 MB. Free memory was 131.2 MB in the beginning and 135.4 MB in the end (delta: -4.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5033.98 ms. Allocated memory was 168.8 MB in the beginning and 228.6 MB in the end (delta: 59.8 MB). Free memory was 134.7 MB in the beginning and 162.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; VAL [\old(d1)=60, \old(d1)=52, \old(d2)=54, \old(d2)=58, d1={9:0}, d2={3:0}] [L34] CALL init() VAL [d1={9:0}, d2={3:0}] [L15] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=10, d1={9:0}, d2={3:0}] [L16] d1.b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={9:0}, d2={3:0}] [L18] d2.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=23, d1={9:0}, d2={3:0}] [L19] d2.b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, d1={9:0}, d2={3:0}] [L34] RET init() VAL [d1={9:0}, d2={3:0}] [L35] CALL, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={9:0}, d1={9:0}, d2={3:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={9:0}, __VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={9:0}, d1={9:0}, d2={3:0}] [L35] RET, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}, get_dummy()={9:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={9:0}, d2={3:0}, get_dummy()={9:0}, pd1={9:0}] [L35] CALL, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={9:0}, d1={9:0}, d2={3:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={9:0}, __VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={9:0}, d1={9:0}, d2={3:0}] [L35] RET, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}, get_dummy()={9:0}, pd1={9:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={9:0}, d2={3:0}, get_dummy()={9:0}, pd1={9:0}, pd2={9:0}] [L35] CALL, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=0, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={9:0}, d2={3:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={3:0}, __VERIFIER_nondet_bool()=0, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={9:0}, d2={3:0}] [L35] RET, EXPR get_dummy() VAL [d1={9:0}, d2={3:0}, get_dummy()={3:0}, pd1={9:0}, pd2={9:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={9:0}, d2={3:0}, get_dummy()={3:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L36] int i = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={9:0}, d2={3:0}, i=0, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [d1={9:0}, d2={3:0}, i=0, pd1={9:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={9:0}, pd3={3:0}] [L37] EXPR (*pd2).a VAL [(*pd2).a=10, d1={9:0}, d2={3:0}, i=0, pd1={9:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={9:0}, pd3={3:0}] [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=10, d1={9:0}, d2={3:0}, i=0, pd1={9:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={9:0}, pd3={3:0}] [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=10, d1={9:0}, d2={3:0}, i=0, pd1={9:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={9:0}, pd3={3:0}] [L38] int *pa = &pd1->a; VAL [d1={9:0}, d2={3:0}, i=0, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L39] EXPR pd3->a VAL [d1={9:0}, d2={3:0}, i=0, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}, pd3->a=23] [L39] i = pd3->a - 10 VAL [d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}, pd3->a=23] [L40] EXPR \read(*pa) VAL [\read(*pa)=10, d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L40] COND FALSE !(i < *pa) VAL [\read(*pa)=10, d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L43] CALL, EXPR check(pd2, i) VAL [\old(i)=13, d1={9:0}, d2={3:0}, s1={9:0}] [L29] EXPR s1->a VAL [\old(i)=13, d1={9:0}, d2={3:0}, i=13, s1={9:0}, s1={9:0}, s1->a=10] [L29] return s1->a == i; VAL [\old(i)=13, \result=0, d1={9:0}, d2={3:0}, i=13, s1={9:0}, s1={9:0}, s1->a=10] [L43] RET, EXPR check(pd2, i) VAL [check(pd2, i)=0, d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L43] COND TRUE !check(pd2, i) VAL [check(pd2, i)=0, d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] [L50] reach_error() VAL [d1={9:0}, d2={3:0}, i=13, pa={9:0}, pd1={9:0}, pd2={9:0}, pd3={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 414 SDslu, 76 SDs, 0 SdLazy, 1311 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 45 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 362 NumberOfCodeBlocks, 362 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 54354 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 58/63 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...