/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/ldv-regression/test24-2.c
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This is Ultimate 0.2.0-b8ad66e
[2020-10-23 18:26:44,261 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-10-23 18:26:44,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-23 18:26:44,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-23 18:26:44,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-23 18:26:44,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-23 18:26:44,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-23 18:26:44,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-23 18:26:44,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-23 18:26:44,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-23 18:26:44,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
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[2020-10-23 18:26:44,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-23 18:26:44,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-23 18:26:44,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-23 18:26:44,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-23 18:26:44,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-23 18:26:44,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
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[2020-10-23 18:26:44,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2020-10-23 18:26:44,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2020-10-23 18:26:44,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-10-23 18:26:44,418 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 18:26:44,447 INFO L113 SettingsManager]: Loading preferences was successful
[2020-10-23 18:26:44,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-23 18:26:44,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-23 18:26:44,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-10-23 18:26:44,449 INFO L138 SettingsManager]: * Use SBE=true
[2020-10-23 18:26:44,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-23 18:26:44,450 INFO L138 SettingsManager]: * sizeof long=4
[2020-10-23 18:26:44,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-10-23 18:26:44,451 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-10-23 18:26:44,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-10-23 18:26:44,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-10-23 18:26:44,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-23 18:26:44,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-10-23 18:26:44,452 INFO L138 SettingsManager]: * sizeof long double=12
[2020-10-23 18:26:44,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-10-23 18:26:44,452 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-10-23 18:26:44,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-10-23 18:26:44,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-23 18:26:44,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-10-23 18:26:44,453 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-10-23 18:26:44,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-10-23 18:26:44,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-23 18:26:44,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-23 18:26:44,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-10-23 18:26:44,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-23 18:26:44,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-10-23 18:26:44,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-23 18:26:44,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-23 18:26:44,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-10-23 18:26:44,455 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-10-23 18:26:44,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-23 18:26:44,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-23 18:26:44,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-23 18:26:44,826 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-10-23 18:26:44,827 INFO L275 PluginConnector]: CDTParser initialized
[2020-10-23 18:26:44,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c
[2020-10-23 18:26:44,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de68b355/92bb51cb1ec24ffaa24069ca49737f37/FLAGf14c2f264
[2020-10-23 18:26:45,541 INFO L306 CDTParser]: Found 1 translation units.
[2020-10-23 18:26:45,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c
[2020-10-23 18:26:45,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de68b355/92bb51cb1ec24ffaa24069ca49737f37/FLAGf14c2f264
[2020-10-23 18:26:45,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de68b355/92bb51cb1ec24ffaa24069ca49737f37
[2020-10-23 18:26:45,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-23 18:26:45,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-23 18:26:45,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-23 18:26:45,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-23 18:26:45,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-23 18:26:45,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:45" (1/1) ...
[2020-10-23 18:26:45,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cab4213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:45, skipping insertion in model container
[2020-10-23 18:26:45,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:45" (1/1) ...
[2020-10-23 18:26:45,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-10-23 18:26:45,971 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-10-23 18:26:46,136 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-10-23 18:26:46,144 INFO L203 MainTranslator]: Completed pre-run
[2020-10-23 18:26:46,167 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-10-23 18:26:46,183 INFO L208 MainTranslator]: Completed translation
[2020-10-23 18:26:46,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46 WrapperNode
[2020-10-23 18:26:46,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-23 18:26:46,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-23 18:26:46,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-23 18:26:46,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-10-23 18:26:46,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (1/1) ...
[2020-10-23 18:26:46,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-23 18:26:46,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-23 18:26:46,226 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-10-23 18:26:46,226 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-10-23 18:26:46,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (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
[2020-10-23 18:26:46,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-23 18:26:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-23 18:26:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-23 18:26:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure check
[2020-10-23 18:26:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-10-23 18:26:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-10-23 18:26:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-23 18:26:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-23 18:26:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-23 18:26:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-23 18:26:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure check
[2020-10-23 18:26:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-10-23 18:26:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-10-23 18:26:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-10-23 18:26:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-23 18:26:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-23 18:26:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-23 18:26:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-23 18:26:46,673 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-23 18:26:46,673 INFO L298 CfgBuilder]: Removed 2 assume(true) statements.
[2020-10-23 18:26:46,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:46 BoogieIcfgContainer
[2020-10-23 18:26:46,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-23 18:26:46,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-23 18:26:46,677 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-10-23 18:26:46,680 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-10-23 18:26:46,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:45" (1/3) ...
[2020-10-23 18:26:46,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1ea774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:46, skipping insertion in model container
[2020-10-23 18:26:46,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:46" (2/3) ...
[2020-10-23 18:26:46,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1ea774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:46, skipping insertion in model container
[2020-10-23 18:26:46,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:46" (3/3) ...
[2020-10-23 18:26:46,684 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c
[2020-10-23 18:26:46,699 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-10-23 18:26:46,711 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-23 18:26:46,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-23 18:26:46,795 INFO L377 AbstractCegarLoop]: Interprodecural is true
[2020-10-23 18:26:46,795 INFO L378 AbstractCegarLoop]: Hoare is true
[2020-10-23 18:26:46,795 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-10-23 18:26:46,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-23 18:26:46,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-23 18:26:46,796 INFO L382 AbstractCegarLoop]: Difference is false
[2020-10-23 18:26:46,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-23 18:26:46,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-23 18:26:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states.
[2020-10-23 18:26:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-10-23 18:26:46,830 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:46,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:46,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash -748858587, now seen corresponding path program 1 times
[2020-10-23 18:26:46,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:46,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680418835]
[2020-10-23 18:26:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-10-23 18:26:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,189 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 18:26:47,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680418835]
[2020-10-23 18:26:47,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 18:26:47,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-10-23 18:26:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403780616]
[2020-10-23 18:26:47,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-10-23 18:26:47,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-10-23 18:26:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-10-23 18:26:47,217 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states.
[2020-10-23 18:26:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:47,375 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions.
[2020-10-23 18:26:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-10-23 18:26:47,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-10-23 18:26:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:47,385 INFO L225 Difference]: With dead ends: 47
[2020-10-23 18:26:47,386 INFO L226 Difference]: Without dead ends: 21
[2020-10-23 18:26:47,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:26:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-10-23 18:26:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-10-23 18:26:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-10-23 18:26:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2020-10-23 18:26:47,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18
[2020-10-23 18:26:47,439 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:47,440 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2020-10-23 18:26:47,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-10-23 18:26:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2020-10-23 18:26:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-10-23 18:26:47,441 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:47,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:47,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-23 18:26:47,442 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -561404142, now seen corresponding path program 1 times
[2020-10-23 18:26:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:47,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334463404]
[2020-10-23 18:26:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-10-23 18:26:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,592 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 18:26:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334463404]
[2020-10-23 18:26:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-23 18:26:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-23 18:26:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572480573]
[2020-10-23 18:26:47,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-23 18:26:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-23 18:26:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-23 18:26:47,597 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states.
[2020-10-23 18:26:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:47,847 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions.
[2020-10-23 18:26:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-10-23 18:26:47,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19
[2020-10-23 18:26:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:47,849 INFO L225 Difference]: With dead ends: 36
[2020-10-23 18:26:47,849 INFO L226 Difference]: Without dead ends: 23
[2020-10-23 18:26:47,850 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 18:26:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-10-23 18:26:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22.
[2020-10-23 18:26:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-10-23 18:26:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2020-10-23 18:26:47,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19
[2020-10-23 18:26:47,858 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:47,858 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2020-10-23 18:26:47,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-23 18:26:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2020-10-23 18:26:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-10-23 18:26:47,859 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:47,859 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]
[2020-10-23 18:26:47,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-23 18:26:47,859 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 362883760, now seen corresponding path program 1 times
[2020-10-23 18:26:47,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268647343]
[2020-10-23 18:26:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2020-10-23 18:26:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:47,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268647343]
[2020-10-23 18:26:47,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842106757]
[2020-10-23 18:26:47,950 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 18:26:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:48,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-10-23 18:26:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:48,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:48,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6
[2020-10-23 18:26:48,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634416781]
[2020-10-23 18:26:48,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-23 18:26:48,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-23 18:26:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-10-23 18:26:48,097 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states.
[2020-10-23 18:26:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:48,165 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions.
[2020-10-23 18:26:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-10-23 18:26:48,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21
[2020-10-23 18:26:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:48,167 INFO L225 Difference]: With dead ends: 38
[2020-10-23 18:26:48,167 INFO L226 Difference]: Without dead ends: 25
[2020-10-23 18:26:48,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-10-23 18:26:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-10-23 18:26:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24.
[2020-10-23 18:26:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-10-23 18:26:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions.
[2020-10-23 18:26:48,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21
[2020-10-23 18:26:48,174 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:48,174 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions.
[2020-10-23 18:26:48,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-23 18:26:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions.
[2020-10-23 18:26:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-10-23 18:26:48,176 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:48,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:48,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2020-10-23 18:26:48,389 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash -454672690, now seen corresponding path program 2 times
[2020-10-23 18:26:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:48,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011521015]
[2020-10-23 18:26:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:48,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15
[2020-10-23 18:26:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011521015]
[2020-10-23 18:26:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505353187]
[2020-10-23 18:26:48,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 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 18:26:48,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-10-23 18:26:48,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-10-23 18:26:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:48,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:48,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7
[2020-10-23 18:26:48,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911800989]
[2020-10-23 18:26:48,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-23 18:26:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-23 18:26:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2020-10-23 18:26:48,613 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states.
[2020-10-23 18:26:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:48,683 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions.
[2020-10-23 18:26:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-10-23 18:26:48,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23
[2020-10-23 18:26:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:48,685 INFO L225 Difference]: With dead ends: 40
[2020-10-23 18:26:48,685 INFO L226 Difference]: Without dead ends: 27
[2020-10-23 18:26:48,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2020-10-23 18:26:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-10-23 18:26:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26.
[2020-10-23 18:26:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-10-23 18:26:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions.
[2020-10-23 18:26:48,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23
[2020-10-23 18:26:48,693 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions.
[2020-10-23 18:26:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-23 18:26:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions.
[2020-10-23 18:26:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-10-23 18:26:48,697 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:48,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:48,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:48,912 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -147405972, now seen corresponding path program 3 times
[2020-10-23 18:26:48,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:48,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707214629]
[2020-10-23 18:26:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-10-23 18:26:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:49,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707214629]
[2020-10-23 18:26:49,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098946495]
[2020-10-23 18:26:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
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 18:26:49,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2020-10-23 18:26:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-10-23 18:26:49,142 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:49,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:49,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8
[2020-10-23 18:26:49,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458778756]
[2020-10-23 18:26:49,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-23 18:26:49,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-23 18:26:49,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-10-23 18:26:49,181 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states.
[2020-10-23 18:26:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:49,245 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions.
[2020-10-23 18:26:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-10-23 18:26:49,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25
[2020-10-23 18:26:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:49,246 INFO L225 Difference]: With dead ends: 42
[2020-10-23 18:26:49,246 INFO L226 Difference]: Without dead ends: 29
[2020-10-23 18:26:49,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-10-23 18:26:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2020-10-23 18:26:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2020-10-23 18:26:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-10-23 18:26:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions.
[2020-10-23 18:26:49,253 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25
[2020-10-23 18:26:49,253 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:49,253 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions.
[2020-10-23 18:26:49,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-23 18:26:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions.
[2020-10-23 18:26:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-10-23 18:26:49,255 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:49,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:49,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:49,469 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1216833398, now seen corresponding path program 4 times
[2020-10-23 18:26:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:49,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478405000]
[2020-10-23 18:26:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-23 18:26:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:49,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478405000]
[2020-10-23 18:26:49,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665720352]
[2020-10-23 18:26:49,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
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 18:26:49,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-10-23 18:26:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-10-23 18:26:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:49,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:49,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9
[2020-10-23 18:26:49,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602700633]
[2020-10-23 18:26:49,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-10-23 18:26:49,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-10-23 18:26:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72
[2020-10-23 18:26:49,684 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states.
[2020-10-23 18:26:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:49,765 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions.
[2020-10-23 18:26:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-10-23 18:26:49,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27
[2020-10-23 18:26:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:49,767 INFO L225 Difference]: With dead ends: 44
[2020-10-23 18:26:49,767 INFO L226 Difference]: Without dead ends: 31
[2020-10-23 18:26:49,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72
[2020-10-23 18:26:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-10-23 18:26:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30.
[2020-10-23 18:26:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-10-23 18:26:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions.
[2020-10-23 18:26:49,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27
[2020-10-23 18:26:49,773 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:49,774 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions.
[2020-10-23 18:26:49,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-10-23 18:26:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions.
[2020-10-23 18:26:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-10-23 18:26:49,775 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:49,775 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:49,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:49,987 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1855561256, now seen corresponding path program 5 times
[2020-10-23 18:26:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:49,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828759615]
[2020-10-23 18:26:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-10-23 18:26:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:50,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828759615]
[2020-10-23 18:26:50,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547430813]
[2020-10-23 18:26:50,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:50,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2020-10-23 18:26:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-10-23 18:26:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:50,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:50,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10
[2020-10-23 18:26:50,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937486090]
[2020-10-23 18:26:50,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-10-23 18:26:50,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-10-23 18:26:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90
[2020-10-23 18:26:50,296 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states.
[2020-10-23 18:26:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:50,404 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions.
[2020-10-23 18:26:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-10-23 18:26:50,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29
[2020-10-23 18:26:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:50,406 INFO L225 Difference]: With dead ends: 46
[2020-10-23 18:26:50,406 INFO L226 Difference]: Without dead ends: 33
[2020-10-23 18:26:50,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90
[2020-10-23 18:26:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-10-23 18:26:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32.
[2020-10-23 18:26:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-10-23 18:26:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions.
[2020-10-23 18:26:50,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29
[2020-10-23 18:26:50,412 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:50,412 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions.
[2020-10-23 18:26:50,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-10-23 18:26:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions.
[2020-10-23 18:26:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-10-23 18:26:50,414 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:50,414 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:50,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2020-10-23 18:26:50,628 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -510675898, now seen corresponding path program 6 times
[2020-10-23 18:26:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:50,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334559389]
[2020-10-23 18:26:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-10-23 18:26:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:50,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334559389]
[2020-10-23 18:26:50,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173688690]
[2020-10-23 18:26:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:51,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-10-23 18:26:51,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-10-23 18:26:51,092 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:51,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:51,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11
[2020-10-23 18:26:51,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206716262]
[2020-10-23 18:26:51,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-10-23 18:26:51,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-10-23 18:26:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110
[2020-10-23 18:26:51,151 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states.
[2020-10-23 18:26:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:51,254 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions.
[2020-10-23 18:26:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-10-23 18:26:51,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31
[2020-10-23 18:26:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:51,256 INFO L225 Difference]: With dead ends: 48
[2020-10-23 18:26:51,256 INFO L226 Difference]: Without dead ends: 35
[2020-10-23 18:26:51,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110
[2020-10-23 18:26:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-10-23 18:26:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34.
[2020-10-23 18:26:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-10-23 18:26:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions.
[2020-10-23 18:26:51,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31
[2020-10-23 18:26:51,263 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:51,263 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions.
[2020-10-23 18:26:51,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-10-23 18:26:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions.
[2020-10-23 18:26:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-10-23 18:26:51,264 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:51,264 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:51,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:51,478 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1868085988, now seen corresponding path program 7 times
[2020-10-23 18:26:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:51,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721433812]
[2020-10-23 18:26:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:51,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:51,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25
[2020-10-23 18:26:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:51,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721433812]
[2020-10-23 18:26:51,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76482230]
[2020-10-23 18:26:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-10-23 18:26:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:51,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:51,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12
[2020-10-23 18:26:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979789009]
[2020-10-23 18:26:51,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-10-23 18:26:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-10-23 18:26:51,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132
[2020-10-23 18:26:51,812 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 12 states.
[2020-10-23 18:26:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:51,941 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions.
[2020-10-23 18:26:51,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-10-23 18:26:51,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33
[2020-10-23 18:26:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:51,942 INFO L225 Difference]: With dead ends: 50
[2020-10-23 18:26:51,943 INFO L226 Difference]: Without dead ends: 37
[2020-10-23 18:26:51,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132
[2020-10-23 18:26:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-10-23 18:26:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2020-10-23 18:26:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-10-23 18:26:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions.
[2020-10-23 18:26:51,950 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33
[2020-10-23 18:26:51,950 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:51,950 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions.
[2020-10-23 18:26:51,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-10-23 18:26:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions.
[2020-10-23 18:26:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-10-23 18:26:51,951 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:51,951 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:52,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:52,165 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:52,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1359310334, now seen corresponding path program 8 times
[2020-10-23 18:26:52,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:52,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660379450]
[2020-10-23 18:26:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-10-23 18:26:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:52,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660379450]
[2020-10-23 18:26:52,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48493317]
[2020-10-23 18:26:52,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:52,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-10-23 18:26:52,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-10-23 18:26:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:52,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:52,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13
[2020-10-23 18:26:52,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832620486]
[2020-10-23 18:26:52,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-10-23 18:26:52,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-10-23 18:26:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156
[2020-10-23 18:26:52,453 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states.
[2020-10-23 18:26:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:52,557 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions.
[2020-10-23 18:26:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-10-23 18:26:52,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35
[2020-10-23 18:26:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:52,559 INFO L225 Difference]: With dead ends: 52
[2020-10-23 18:26:52,559 INFO L226 Difference]: Without dead ends: 39
[2020-10-23 18:26:52,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156
[2020-10-23 18:26:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-10-23 18:26:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38.
[2020-10-23 18:26:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-10-23 18:26:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions.
[2020-10-23 18:26:52,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35
[2020-10-23 18:26:52,565 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:52,566 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions.
[2020-10-23 18:26:52,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-10-23 18:26:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions.
[2020-10-23 18:26:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-10-23 18:26:52,567 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:52,567 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:52,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2020-10-23 18:26:52,779 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:52,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1920788064, now seen corresponding path program 9 times
[2020-10-23 18:26:52,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:52,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003079464]
[2020-10-23 18:26:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-10-23 18:26:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:52,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003079464]
[2020-10-23 18:26:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091370750]
[2020-10-23 18:26:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:53,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2020-10-23 18:26:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-10-23 18:26:53,252 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:53,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:53,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14
[2020-10-23 18:26:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168437404]
[2020-10-23 18:26:53,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-10-23 18:26:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-10-23 18:26:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182
[2020-10-23 18:26:53,294 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states.
[2020-10-23 18:26:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:53,437 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions.
[2020-10-23 18:26:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states.
[2020-10-23 18:26:53,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37
[2020-10-23 18:26:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:53,438 INFO L225 Difference]: With dead ends: 54
[2020-10-23 18:26:53,439 INFO L226 Difference]: Without dead ends: 41
[2020-10-23 18:26:53,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182
[2020-10-23 18:26:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2020-10-23 18:26:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40.
[2020-10-23 18:26:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-10-23 18:26:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions.
[2020-10-23 18:26:53,449 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37
[2020-10-23 18:26:53,449 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:53,449 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions.
[2020-10-23 18:26:53,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-10-23 18:26:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions.
[2020-10-23 18:26:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-10-23 18:26:53,454 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:53,454 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:53,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:53,667 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash -335007298, now seen corresponding path program 10 times
[2020-10-23 18:26:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:53,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399474455]
[2020-10-23 18:26:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:53,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31
[2020-10-23 18:26:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399474455]
[2020-10-23 18:26:53,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108964790]
[2020-10-23 18:26:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:53,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-10-23 18:26:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-10-23 18:26:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:54,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:54,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15
[2020-10-23 18:26:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747534223]
[2020-10-23 18:26:54,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-10-23 18:26:54,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-10-23 18:26:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210
[2020-10-23 18:26:54,006 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states.
[2020-10-23 18:26:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:54,103 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions.
[2020-10-23 18:26:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2020-10-23 18:26:54,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39
[2020-10-23 18:26:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:54,104 INFO L225 Difference]: With dead ends: 56
[2020-10-23 18:26:54,104 INFO L226 Difference]: Without dead ends: 43
[2020-10-23 18:26:54,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210
[2020-10-23 18:26:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-10-23 18:26:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42.
[2020-10-23 18:26:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-10-23 18:26:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions.
[2020-10-23 18:26:54,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39
[2020-10-23 18:26:54,111 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:54,111 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions.
[2020-10-23 18:26:54,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-10-23 18:26:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions.
[2020-10-23 18:26:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-10-23 18:26:54,112 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:54,112 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:54,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:54,325 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1113081252, now seen corresponding path program 11 times
[2020-10-23 18:26:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:54,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864224497]
[2020-10-23 18:26:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:54,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:54,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33
[2020-10-23 18:26:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:54,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864224497]
[2020-10-23 18:26:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391528113]
[2020-10-23 18:26:54,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:54,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s)
[2020-10-23 18:26:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-10-23 18:26:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:54,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:54,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16
[2020-10-23 18:26:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100634769]
[2020-10-23 18:26:54,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-10-23 18:26:54,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-10-23 18:26:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240
[2020-10-23 18:26:54,893 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states.
[2020-10-23 18:26:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:55,029 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions.
[2020-10-23 18:26:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-10-23 18:26:55,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41
[2020-10-23 18:26:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:55,031 INFO L225 Difference]: With dead ends: 58
[2020-10-23 18:26:55,031 INFO L226 Difference]: Without dead ends: 45
[2020-10-23 18:26:55,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240
[2020-10-23 18:26:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2020-10-23 18:26:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44.
[2020-10-23 18:26:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2020-10-23 18:26:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions.
[2020-10-23 18:26:55,037 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41
[2020-10-23 18:26:55,038 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:55,038 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions.
[2020-10-23 18:26:55,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-10-23 18:26:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions.
[2020-10-23 18:26:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2020-10-23 18:26:55,039 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:55,039 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:55,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2020-10-23 18:26:55,240 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1517841542, now seen corresponding path program 12 times
[2020-10-23 18:26:55,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:55,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962154875]
[2020-10-23 18:26:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:55,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:55,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-10-23 18:26:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:55,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962154875]
[2020-10-23 18:26:55,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730200295]
[2020-10-23 18:26:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:56,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s)
[2020-10-23 18:26:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-10-23 18:26:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:56,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:56,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17
[2020-10-23 18:26:56,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050595113]
[2020-10-23 18:26:56,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-10-23 18:26:56,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:56,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-10-23 18:26:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272
[2020-10-23 18:26:56,095 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states.
[2020-10-23 18:26:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:56,197 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions.
[2020-10-23 18:26:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2020-10-23 18:26:56,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43
[2020-10-23 18:26:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:56,201 INFO L225 Difference]: With dead ends: 60
[2020-10-23 18:26:56,201 INFO L226 Difference]: Without dead ends: 47
[2020-10-23 18:26:56,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272
[2020-10-23 18:26:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-10-23 18:26:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46.
[2020-10-23 18:26:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-10-23 18:26:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions.
[2020-10-23 18:26:56,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43
[2020-10-23 18:26:56,213 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:56,213 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions.
[2020-10-23 18:26:56,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-10-23 18:26:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions.
[2020-10-23 18:26:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2020-10-23 18:26:56,214 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:56,214 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:56,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2020-10-23 18:26:56,415 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash 349543704, now seen corresponding path program 13 times
[2020-10-23 18:26:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:56,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460861811]
[2020-10-23 18:26:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:56,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:56,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-10-23 18:26:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460861811]
[2020-10-23 18:26:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202294955]
[2020-10-23 18:26:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-10-23 18:26:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:56,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:56,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18
[2020-10-23 18:26:56,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476433958]
[2020-10-23 18:26:56,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-10-23 18:26:56,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-10-23 18:26:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306
[2020-10-23 18:26:56,834 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states.
[2020-10-23 18:26:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:56,976 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions.
[2020-10-23 18:26:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2020-10-23 18:26:56,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45
[2020-10-23 18:26:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:56,978 INFO L225 Difference]: With dead ends: 62
[2020-10-23 18:26:56,978 INFO L226 Difference]: Without dead ends: 49
[2020-10-23 18:26:56,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306
[2020-10-23 18:26:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2020-10-23 18:26:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48.
[2020-10-23 18:26:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-10-23 18:26:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions.
[2020-10-23 18:26:56,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45
[2020-10-23 18:26:56,991 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:56,991 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions.
[2020-10-23 18:26:56,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-10-23 18:26:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions.
[2020-10-23 18:26:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-10-23 18:26:56,996 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:56,996 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:57,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2020-10-23 18:26:57,207 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -389564618, now seen corresponding path program 14 times
[2020-10-23 18:26:57,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:57,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835353902]
[2020-10-23 18:26:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:57,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:57,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39
[2020-10-23 18:26:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:57,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835353902]
[2020-10-23 18:26:57,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527584162]
[2020-10-23 18:26:57,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:57,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-10-23 18:26:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-10-23 18:26:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:57,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:57,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19
[2020-10-23 18:26:57,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848575498]
[2020-10-23 18:26:57,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-10-23 18:26:57,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:57,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-10-23 18:26:57,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342
[2020-10-23 18:26:57,616 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states.
[2020-10-23 18:26:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:57,761 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions.
[2020-10-23 18:26:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-10-23 18:26:57,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47
[2020-10-23 18:26:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:57,763 INFO L225 Difference]: With dead ends: 64
[2020-10-23 18:26:57,763 INFO L226 Difference]: Without dead ends: 51
[2020-10-23 18:26:57,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342
[2020-10-23 18:26:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2020-10-23 18:26:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50.
[2020-10-23 18:26:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-10-23 18:26:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions.
[2020-10-23 18:26:57,775 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47
[2020-10-23 18:26:57,775 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:57,775 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions.
[2020-10-23 18:26:57,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-10-23 18:26:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions.
[2020-10-23 18:26:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2020-10-23 18:26:57,776 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:57,777 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:57,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:57,986 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:57,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2003058220, now seen corresponding path program 15 times
[2020-10-23 18:26:57,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:57,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565131224]
[2020-10-23 18:26:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:26:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:58,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:26:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:58,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2020-10-23 18:26:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:26:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:58,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565131224]
[2020-10-23 18:26:58,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448654507]
[2020-10-23 18:26:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:26:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s)
[2020-10-23 18:26:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:26:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-10-23 18:26:59,623 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:26:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:26:59,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:26:59,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20
[2020-10-23 18:26:59,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754390759]
[2020-10-23 18:26:59,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-10-23 18:26:59,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:26:59,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-10-23 18:26:59,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380
[2020-10-23 18:26:59,680 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states.
[2020-10-23 18:26:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:26:59,784 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions.
[2020-10-23 18:26:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2020-10-23 18:26:59,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49
[2020-10-23 18:26:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:26:59,786 INFO L225 Difference]: With dead ends: 66
[2020-10-23 18:26:59,786 INFO L226 Difference]: Without dead ends: 53
[2020-10-23 18:26:59,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380
[2020-10-23 18:26:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-10-23 18:26:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52.
[2020-10-23 18:26:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-10-23 18:26:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions.
[2020-10-23 18:26:59,791 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49
[2020-10-23 18:26:59,792 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:26:59,792 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions.
[2020-10-23 18:26:59,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-10-23 18:26:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions.
[2020-10-23 18:26:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-10-23 18:26:59,793 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:26:59,793 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:26:59,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2020-10-23 18:26:59,994 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:26:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:26:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2087215886, now seen corresponding path program 16 times
[2020-10-23 18:26:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:26:59,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675528467]
[2020-10-23 18:26:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:27:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:27:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:00,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43
[2020-10-23 18:27:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:00,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675528467]
[2020-10-23 18:27:00,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081897887]
[2020-10-23 18:27:00,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:00,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-10-23 18:27:00,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:27:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-10-23 18:27:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:27:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:00,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:27:00,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21
[2020-10-23 18:27:00,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847923091]
[2020-10-23 18:27:00,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-10-23 18:27:00,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:27:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-10-23 18:27:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420
[2020-10-23 18:27:00,483 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 21 states.
[2020-10-23 18:27:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:27:00,642 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions.
[2020-10-23 18:27:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-10-23 18:27:00,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51
[2020-10-23 18:27:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:27:00,644 INFO L225 Difference]: With dead ends: 68
[2020-10-23 18:27:00,644 INFO L226 Difference]: Without dead ends: 55
[2020-10-23 18:27:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420
[2020-10-23 18:27:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-10-23 18:27:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54.
[2020-10-23 18:27:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-10-23 18:27:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions.
[2020-10-23 18:27:00,650 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51
[2020-10-23 18:27:00,650 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:27:00,650 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions.
[2020-10-23 18:27:00,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-10-23 18:27:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions.
[2020-10-23 18:27:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-10-23 18:27:00,651 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:27:00,651 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:27:00,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2020-10-23 18:27:00,865 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:27:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:27:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1358354288, now seen corresponding path program 17 times
[2020-10-23 18:27:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:27:00,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104648444]
[2020-10-23 18:27:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:27:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:01,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:27:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:01,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-10-23 18:27:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:01,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104648444]
[2020-10-23 18:27:01,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864659827]
[2020-10-23 18:27:01,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:04,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s)
[2020-10-23 18:27:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:27:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-10-23 18:27:04,898 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:27:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:04,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:27:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22
[2020-10-23 18:27:04,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769832026]
[2020-10-23 18:27:04,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-10-23 18:27:04,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:27:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-10-23 18:27:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462
[2020-10-23 18:27:04,932 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 22 states.
[2020-10-23 18:27:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:27:05,059 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions.
[2020-10-23 18:27:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-10-23 18:27:05,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53
[2020-10-23 18:27:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:27:05,060 INFO L225 Difference]: With dead ends: 70
[2020-10-23 18:27:05,060 INFO L226 Difference]: Without dead ends: 57
[2020-10-23 18:27:05,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462
[2020-10-23 18:27:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-10-23 18:27:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56.
[2020-10-23 18:27:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-10-23 18:27:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions.
[2020-10-23 18:27:05,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53
[2020-10-23 18:27:05,074 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:27:05,074 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions.
[2020-10-23 18:27:05,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-10-23 18:27:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions.
[2020-10-23 18:27:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2020-10-23 18:27:05,075 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:27:05,075 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:27:05,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:05,288 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:27:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:27:05,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1002027858, now seen corresponding path program 18 times
[2020-10-23 18:27:05,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:27:05,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921727750]
[2020-10-23 18:27:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:27:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:05,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:27:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47
[2020-10-23 18:27:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:05,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921727750]
[2020-10-23 18:27:05,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493192499]
[2020-10-23 18:27:05,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:09,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s)
[2020-10-23 18:27:09,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-10-23 18:27:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-10-23 18:27:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:27:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:09,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:27:09,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23
[2020-10-23 18:27:09,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194801709]
[2020-10-23 18:27:09,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-10-23 18:27:09,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:27:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-10-23 18:27:09,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506
[2020-10-23 18:27:09,687 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states.
[2020-10-23 18:27:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:27:09,880 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions.
[2020-10-23 18:27:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2020-10-23 18:27:09,881 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55
[2020-10-23 18:27:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:27:09,882 INFO L225 Difference]: With dead ends: 72
[2020-10-23 18:27:09,882 INFO L226 Difference]: Without dead ends: 59
[2020-10-23 18:27:09,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506
[2020-10-23 18:27:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2020-10-23 18:27:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58.
[2020-10-23 18:27:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-10-23 18:27:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions.
[2020-10-23 18:27:09,887 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55
[2020-10-23 18:27:09,887 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:27:09,888 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions.
[2020-10-23 18:27:09,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-10-23 18:27:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions.
[2020-10-23 18:27:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2020-10-23 18:27:09,888 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:27:09,888 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:27:10,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:10,100 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:27:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:27:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2125254988, now seen corresponding path program 19 times
[2020-10-23 18:27:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:27:10,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654808275]
[2020-10-23 18:27:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:27:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-23 18:27:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:10,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49
[2020-10-23 18:27:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654808275]
[2020-10-23 18:27:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713795068]
[2020-10-23 18:27:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-23 18:27:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-10-23 18:27:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-10-23 18:27:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-23 18:27:10,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-10-23 18:27:10,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24
[2020-10-23 18:27:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951228481]
[2020-10-23 18:27:10,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-10-23 18:27:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-10-23 18:27:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-10-23 18:27:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552
[2020-10-23 18:27:10,617 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states.
[2020-10-23 18:27:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-23 18:27:10,857 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions.
[2020-10-23 18:27:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2020-10-23 18:27:10,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57
[2020-10-23 18:27:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-23 18:27:10,859 INFO L225 Difference]: With dead ends: 73
[2020-10-23 18:27:10,859 INFO L226 Difference]: Without dead ends: 60
[2020-10-23 18:27:10,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552
[2020-10-23 18:27:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2020-10-23 18:27:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60.
[2020-10-23 18:27:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-10-23 18:27:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions.
[2020-10-23 18:27:10,866 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57
[2020-10-23 18:27:10,866 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-10-23 18:27:10,867 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions.
[2020-10-23 18:27:10,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-10-23 18:27:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions.
[2020-10-23 18:27:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2020-10-23 18:27:10,868 INFO L414 BasicCegarLoop]: Found error trace
[2020-10-23 18:27:10,868 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-23 18:27:11,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-10-23 18:27:11,081 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-23 18:27:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-10-23 18:27:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash 966962794, now seen corresponding path program 20 times
[2020-10-23 18:27:11,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-10-23 18:27:11,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816716594]
[2020-10-23 18:27:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-23 18:27:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 18:27:11,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 18:27:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-10-23 18:27:11,486 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-10-23 18:27:11,534 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-10-23 18:27:11,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2020-10-23 18:27:11,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2020-10-23 18:27:11,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:27:11 BoogieIcfgContainer
[2020-10-23 18:27:11,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-10-23 18:27:11,615 INFO L168 Benchmark]: Toolchain (without parser) took 25687.17 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 135.2 MB in the beginning and 177.9 MB in the end (delta: -42.7 MB). Peak memory consumption was 28.9 MB. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,616 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 160.4 MB. Free memory is still 133.9 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.50 ms. Allocated memory is still 160.4 MB. Free memory was 134.6 MB in the beginning and 124.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,617 INFO L168 Benchmark]: Boogie Preprocessor took 40.40 ms. Allocated memory is still 160.4 MB. Free memory was 124.4 MB in the beginning and 122.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,617 INFO L168 Benchmark]: RCFGBuilder took 448.94 ms. Allocated memory is still 160.4 MB. Free memory was 122.9 MB in the beginning and 107.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,618 INFO L168 Benchmark]: TraceAbstraction took 24936.91 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 107.3 MB in the beginning and 177.9 MB in the end (delta: -70.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB.
[2020-10-23 18:27:11,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.17 ms. Allocated memory is still 160.4 MB. Free memory is still 133.9 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 249.50 ms. Allocated memory is still 160.4 MB. Free memory was 134.6 MB in the beginning and 124.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 40.40 ms. Allocated memory is still 160.4 MB. Free memory was 124.4 MB in the beginning and 122.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 448.94 ms. Allocated memory is still 160.4 MB. Free memory was 122.9 MB in the beginning and 107.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 24936.91 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 107.3 MB in the beginning and 177.9 MB in the end (delta: -70.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L17] struct dummy ad1[20], *ad2;
[L18] int i, j, *pa;
[L19] j=0
VAL [ad1={3:0}, j=0]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=1]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=2]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=3]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=4]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=5]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=6]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=7]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=8]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=9]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=10]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=11]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=12]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=13]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=14]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=15]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=16]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=17]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=18]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=19]
[L19] COND TRUE j<20
[L20] ad1[j].a = __VERIFIER_nondet_int()
[L21] ad1[j].b = __VERIFIER_nondet_int()
[L19] j++
VAL [ad1={3:0}, j=20]
[L19] COND FALSE !(j<20)
VAL [ad1={3:0}, j=20]
[L23] i = __VERIFIER_nondet_int()
[L24] COND TRUE i >= 0 && i < 10
[L25] ad2 = ad1
[L26] ad1[i].a = i
[L27] pa = &ad1[i].a
[L28] EXPR ad2[i].a
[L28] i = ad2[i].a + 10
[L29] EXPR \read(*pa)
VAL [\read(*pa)=0, ad1={3:0}, ad2={3:0}, i=10, j=20, pa={3:0}]
[L29] COND FALSE !(i < *pa)
[L32] CALL, EXPR check(ad1, i)
VAL [\old(b)=10, ad1={3:0}]
[L12] EXPR ad1[b].a
[L12] return ad1[b].a == b;
[L32] RET, EXPR check(ad1, i)
VAL [ad1={3:0}, ad2={3:0}, check(ad1, i)=0, i=10, j=20, pa={3:0}]
[L32] COND TRUE !check(ad1, i)
[L39] CALL reach_error()
[L3] __assert_fail("0", "test24-2.c", 3, "reach_error")
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.7s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 386 SDtfs, 273 SDslu, 2214 SDs, 0 SdLazy, 1577 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1058 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 11.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1578 NumberOfCodeBlocks, 1578 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1479 ConstructedInterpolants, 0 QuantifiedInterpolants, 152559 SizeOfPredicates, 19 NumberOfNonLiveVariables, 4085 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...