/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/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:53,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:53,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:54,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:54,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:54,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:54,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:54,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:54,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:54,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:54,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:54,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:54,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:54,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:54,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:54,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:54,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:54,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:54,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:54,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:54,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:54,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:54,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:54,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:54,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:54,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:54,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:54,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:54,091 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 [2020-10-23 18:41:54,142 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:54,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:54,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:54,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:54,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:54,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:54,146 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:54,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:54,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:54,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:54,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:54,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:54,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:54,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:54,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:54,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:54,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:54,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:54,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:54,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:54,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:54,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:54,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:54,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:54,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:54,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:54,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:54,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:54,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:54,576 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:54,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-10-23 18:41:54,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dc05ce61/ea3582f93ef54da8bda94d15413d69af/FLAGca3c7931d [2020-10-23 18:41:55,263 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:55,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-10-23 18:41:55,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dc05ce61/ea3582f93ef54da8bda94d15413d69af/FLAGca3c7931d [2020-10-23 18:41:55,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dc05ce61/ea3582f93ef54da8bda94d15413d69af [2020-10-23 18:41:55,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:55,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:55,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:55,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:55,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:55,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51697eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55, skipping insertion in model container [2020-10-23 18:41:55,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:55,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:55,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:55,887 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:55,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:55,926 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:55,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55 WrapperNode [2020-10-23 18:41:55,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:55,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:55,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:55,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:55,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (1/1) ... [2020-10-23 18:41:55,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:55,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:55,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:55,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:55,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (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 [2020-10-23 18:41:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:56,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:56,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:56,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:56,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:56,717 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:56,718 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:56,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:56 BoogieIcfgContainer [2020-10-23 18:41:56,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:56,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:56,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:56,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:56,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:55" (1/3) ... [2020-10-23 18:41:56,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2351ba5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:56, skipping insertion in model container [2020-10-23 18:41:56,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:55" (2/3) ... [2020-10-23 18:41:56,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2351ba5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:56, skipping insertion in model container [2020-10-23 18:41:56,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:56" (3/3) ... [2020-10-23 18:41:56,733 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-10-23 18:41:56,744 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:56,749 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:56,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:56,790 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:56,790 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:56,791 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:56,791 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:56,791 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:56,791 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:56,791 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:56,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 18:41:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:56,820 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] [2020-10-23 18:41:56,821 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash -996507287, now seen corresponding path program 1 times [2020-10-23 18:41:56,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:56,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634338348] [2020-10-23 18:41:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:57,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:57,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634338348] [2020-10-23 18:41:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737643000] [2020-10-23 18:41:57,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:57,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:57,202 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 18:41:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:57,331 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-10-23 18:41:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:57,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 18:41:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:57,358 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:41:57,358 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:41:57,362 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 [2020-10-23 18:41:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:41:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:41:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:41:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-23 18:41:57,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-10-23 18:41:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:57,410 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-23 18:41:57,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-23 18:41:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:57,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:57,411 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] [2020-10-23 18:41:57,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:57,412 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1837020483, now seen corresponding path program 1 times [2020-10-23 18:41:57,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:57,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887545707] [2020-10-23 18:41:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:57,438 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:57,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346668194] [2020-10-23 18:41:57,439 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 [2020-10-23 18:41:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:57,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:57,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887545707] [2020-10-23 18:41:57,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346668194] [2020-10-23 18:41:57,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:57,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:41:57,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889823081] [2020-10-23 18:41:57,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:57,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:57,620 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-10-23 18:41:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:57,707 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-23 18:41:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:57,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:41:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:57,711 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:41:57,711 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:41:57,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:41:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-23 18:41:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:41:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-23 18:41:57,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-10-23 18:41:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:57,727 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-23 18:41:57,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-23 18:41:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:41:57,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:57,729 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, 1, 1, 1] [2020-10-23 18:41:57,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:41:57,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 617062164, now seen corresponding path program 1 times [2020-10-23 18:41:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:57,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440658071] [2020-10-23 18:41:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:58,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:58,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:41:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440658071] [2020-10-23 18:41:58,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:58,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:41:58,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694196660] [2020-10-23 18:41:58,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:58,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:58,056 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-10-23 18:41:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:58,182 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-23 18:41:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:58,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:41:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:58,184 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:41:58,185 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:41:58,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:41:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-23 18:41:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:41:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:41:58,195 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-10-23 18:41:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:58,195 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:41:58,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:41:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:41:58,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:58,210 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, 1, 1, 1] [2020-10-23 18:41:58,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:58,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1010089174, now seen corresponding path program 1 times [2020-10-23 18:41:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:58,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539939718] [2020-10-23 18:41:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:58,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:58,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062753275] [2020-10-23 18:41:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:58,346 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:41:58,346 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:58,350 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:58,351 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:58,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-23 18:41:58,387 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:58,387 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-10-23 18:41:58,388 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:58,400 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-10-23 18:41:58,401 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:58,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-10-23 18:41:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:41:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539939718] [2020-10-23 18:41:58,434 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:58,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062753275] [2020-10-23 18:41:58,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:58,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:41:58,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137601241] [2020-10-23 18:41:58,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:58,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:58,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:58,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:58,437 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-10-23 18:41:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:58,545 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-23 18:41:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:58,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-23 18:41:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:58,548 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:41:58,548 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:41:58,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:41:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-23 18:41:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:41:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-23 18:41:58,558 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2020-10-23 18:41:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:58,559 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-23 18:41:58,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-23 18:41:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:41:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:58,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:58,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:58,776 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1048457280, now seen corresponding path program 1 times [2020-10-23 18:41:58,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:58,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013795434] [2020-10-23 18:41:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:58,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:58,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434887917] [2020-10-23 18:41:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:41:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:41:58,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013795434] [2020-10-23 18:41:58,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:58,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434887917] [2020-10-23 18:41:58,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:58,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:41:58,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198366894] [2020-10-23 18:41:58,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:58,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:58,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:58,940 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-10-23 18:41:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:59,129 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-23 18:41:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:41:59,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-23 18:41:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:59,131 INFO L225 Difference]: With dead ends: 93 [2020-10-23 18:41:59,131 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:41:59,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:41:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:41:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-10-23 18:41:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:41:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-23 18:41:59,142 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-10-23 18:41:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:59,143 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-23 18:41:59,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-23 18:41:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:41:59,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:59,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:59,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:59,359 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 481130819, now seen corresponding path program 1 times [2020-10-23 18:41:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:59,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994734412] [2020-10-23 18:41:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:59,407 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:59,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797465374] [2020-10-23 18:41:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:59,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:59,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:59,588 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:59,589 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:59,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:59,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:59 BoogieIcfgContainer [2020-10-23 18:41:59,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:59,855 INFO L168 Benchmark]: Toolchain (without parser) took 4202.17 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 134.7 MB in the beginning and 146.5 MB in the end (delta: -11.7 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:59,855 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:59,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 124.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:59,857 INFO L168 Benchmark]: Boogie Preprocessor took 41.74 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 122.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:59,858 INFO L168 Benchmark]: RCFGBuilder took 748.76 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 131.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:59,859 INFO L168 Benchmark]: TraceAbstraction took 3128.98 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 131.3 MB in the beginning and 146.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:59,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 124.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.74 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 122.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 748.76 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 131.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3128.98 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 131.3 MB in the beginning and 146.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=7, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L31] COND TRUE i