/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:51:44,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:51:44,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:51:45,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:51:45,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:51:45,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:51:45,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:51:45,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:51:45,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:51:45,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:51:45,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:51:45,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:51:45,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:51:45,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:51:45,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:51:45,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:51:45,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:51:45,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:51:45,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:51:45,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:51:45,115 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 [2021-02-23 13:51:45,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:51:45,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:51:45,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:51:45,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:51:45,144 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:51:45,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:51:45,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:51:45,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:51:45,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:51:45,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:51:45,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:51:45,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:51:45,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:51:45,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:51:45,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:51:45,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:51:45,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:51:45,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:51:45,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:51:45,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:51:45,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:51:45,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:51:45,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:51:45,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:51:45,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:51:45,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:51:45,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:51:45,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:51:45,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:51:45,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:51:45,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:51:45,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:51:45,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:51:45,528 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:51:45,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2021-02-23 13:51:45,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36138aef0/5b3607e9e7a348839c89a15c7bc1eba5/FLAG899c33e3f [2021-02-23 13:51:46,168 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:51:46,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2021-02-23 13:51:46,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36138aef0/5b3607e9e7a348839c89a15c7bc1eba5/FLAG899c33e3f [2021-02-23 13:51:46,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36138aef0/5b3607e9e7a348839c89a15c7bc1eba5 [2021-02-23 13:51:46,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:51:46,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:51:46,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:51:46,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:51:46,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:51:46,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c79307b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46, skipping insertion in model container [2021-02-23 13:51:46,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:51:46,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:51:46,853 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c[588,601] [2021-02-23 13:51:46,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:51:46,882 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:51:46,896 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c[588,601] [2021-02-23 13:51:46,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:51:46,921 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:51:46,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46 WrapperNode [2021-02-23 13:51:46,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:51:46,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:51:46,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:51:46,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:51:46,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (1/1) ... [2021-02-23 13:51:46,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:51:46,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:51:46,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:51:46,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:51:46,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (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 13:51:47,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:51:47,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:51:47,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:51:47,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 13:51:47,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 13:51:47,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:51:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:51:47,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:51:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:51:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:51:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 13:51:47,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 13:51:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:51:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 13:51:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:51:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 13:51:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:51:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:51:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:51:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:51:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:51:47,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:51:47,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:51:47,507 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-23 13:51:47,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:51:47 BoogieIcfgContainer [2021-02-23 13:51:47,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:51:47,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:51:47,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:51:47,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:51:47,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:51:46" (1/3) ... [2021-02-23 13:51:47,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1614bd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:51:47, skipping insertion in model container [2021-02-23 13:51:47,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:51:46" (2/3) ... [2021-02-23 13:51:47,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1614bd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:51:47, skipping insertion in model container [2021-02-23 13:51:47,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:51:47" (3/3) ... [2021-02-23 13:51:47,527 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2021-02-23 13:51:47,534 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:51:47,539 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:51:47,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:51:47,581 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:51:47,581 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:51:47,581 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:51:47,581 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:51:47,581 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:51:47,582 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:51:47,582 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:51:47,582 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:51:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-23 13:51:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:51:47,605 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:51:47,605 INFO L422 BasicCegarLoop]: trace histogram [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 13:51:47,606 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:51:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:51:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash 199879945, now seen corresponding path program 1 times [2021-02-23 13:51:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:51:47,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483955027] [2021-02-23 13:51:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:51:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:47,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:47,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:47,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:47,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:51:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:47,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:47,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:47,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 13:51:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:47,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:47,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:47,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:47,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:51:47,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483955027] [2021-02-23 13:51:47,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:51:47,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:51:47,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384038331] [2021-02-23 13:51:47,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:51:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:51:47,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:51:47,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:51:47,952 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2021-02-23 13:51:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:51:48,079 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-02-23 13:51:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:51:48,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2021-02-23 13:51:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:51:48,089 INFO L225 Difference]: With dead ends: 58 [2021-02-23 13:51:48,089 INFO L226 Difference]: Without dead ends: 29 [2021-02-23 13:51:48,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:51:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-23 13:51:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-23 13:51:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-23 13:51:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-02-23 13:51:48,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2021-02-23 13:51:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:51:48,133 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-02-23 13:51:48,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:51:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-02-23 13:51:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:51:48,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:51:48,135 INFO L422 BasicCegarLoop]: trace histogram [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 13:51:48,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:51:48,136 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:51:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:51:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -386926069, now seen corresponding path program 1 times [2021-02-23 13:51:48,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:51:48,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384634695] [2021-02-23 13:51:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:51:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:48,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:48,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:51:48,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:51:48,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:48,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:51:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:48,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:48,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 13:51:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:51:48,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:51:48,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:51:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:51:48,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384634695] [2021-02-23 13:51:48,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:51:48,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 13:51:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088410122] [2021-02-23 13:51:48,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 13:51:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:51:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 13:51:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:51:48,445 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2021-02-23 13:51:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:51:48,720 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-02-23 13:51:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:51:48,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-02-23 13:51:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:51:48,724 INFO L225 Difference]: With dead ends: 51 [2021-02-23 13:51:48,724 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 13:51:48,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:51:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 13:51:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-02-23 13:51:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 13:51:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-02-23 13:51:48,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2021-02-23 13:51:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:51:48,740 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-02-23 13:51:48,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 13:51:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-02-23 13:51:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:51:48,742 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:51:48,742 INFO L422 BasicCegarLoop]: trace histogram [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 13:51:48,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:51:48,743 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:51:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:51:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -292108345, now seen corresponding path program 1 times [2021-02-23 13:51:48,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:51:48,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833229187] [2021-02-23 13:51:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:51:48,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-02-23 13:51:48,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687733227] [2021-02-23 13:51:48,765 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 [2021-02-23 13:51:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:51:48,883 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:51:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:51:48,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:51:48,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:51:48,986 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:51:49,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-23 13:51:49,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:51:49 BoogieIcfgContainer [2021-02-23 13:51:49,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:51:49,257 INFO L168 Benchmark]: Toolchain (without parser) took 2687.14 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 126.5 MB in the beginning and 173.8 MB in the end (delta: -47.3 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:51:49,258 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 122.9 MB in the beginning and 122.8 MB in the end (delta: 99.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:51:49,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.33 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:51:49,259 INFO L168 Benchmark]: Boogie Preprocessor took 41.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:51:49,260 INFO L168 Benchmark]: RCFGBuilder took 544.26 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 132.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:51:49,261 INFO L168 Benchmark]: TraceAbstraction took 1742.94 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 132.1 MB in the beginning and 173.8 MB in the end (delta: -41.7 MB). Peak memory consumption was 83.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:51:49,265 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 151.0 MB. Free memory was 122.9 MB in the beginning and 122.8 MB in the end (delta: 99.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.33 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.51 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 544.26 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 132.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1742.94 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 132.1 MB in the beginning and 173.8 MB in the end (delta: -41.7 MB). Peak memory consumption was 83.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=10, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L32] COND TRUE i