/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-d623d84
[2020-07-20 12:21:39,482 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 12:21:39,485 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 12:21:39,504 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 12:21:39,504 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 12:21:39,506 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 12:21:39,508 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 12:21:39,521 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 12:21:39,523 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 12:21:39,524 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 12:21:39,525 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 12:21:39,528 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 12:21:39,528 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 12:21:39,531 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 12:21:39,534 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 12:21:39,537 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 12:21:39,539 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 12:21:39,540 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 12:21:39,541 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 12:21:39,548 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 12:21:39,552 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 12:21:39,553 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 12:21:39,555 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 12:21:39,555 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 12:21:39,558 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 12:21:39,558 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 12:21:39,559 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 12:21:39,561 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 12:21:39,561 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 12:21:39,563 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 12:21:39,563 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 12:21:39,565 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 12:21:39,565 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 12:21:39,566 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 12:21:39,570 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 12:21:39,570 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 12:21:39,571 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 12:21:39,571 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 12:21:39,572 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 12:21:39,572 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 12:21:39,573 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 12:21:39,574 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
[2020-07-20 12:21:39,594 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 12:21:39,595 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 12:21:39,597 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 12:21:39,597 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 12:21:39,597 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 12:21:39,597 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 12:21:39,598 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 12:21:39,598 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 12:21:39,598 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 12:21:39,598 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 12:21:39,599 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 12:21:39,600 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 12:21:39,600 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 12:21:39,600 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 12:21:39,600 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 12:21:39,601 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 12:21:39,601 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 12:21:39,601 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 12:21:39,601 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 12:21:39,601 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 12:21:39,602 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 12:21:39,602 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 12:21:39,602 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 12:21:39,602 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 12:21:39,602 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 12:21:39,603 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 12:21:39,603 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:39,603 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 12:21:39,603 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 12:21:39,603 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY
[2020-07-20 12:21:39,902 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 12:21:39,921 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 12:21:39,924 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 12:21:39,926 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 12:21:39,928 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 12:21:39,929 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c
[2020-07-20 12:21:39,999 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b/FLAG6da09e29a
[2020-07-20 12:21:40,451 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 12:21:40,452 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c
[2020-07-20 12:21:40,459 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b/FLAG6da09e29a
[2020-07-20 12:21:40,896 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967e0fcf/6936de3415af487f8f0050163dbf0f7b
[2020-07-20 12:21:40,908 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 12:21:40,912 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 12:21:40,913 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 12:21:40,913 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 12:21:40,917 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 12:21:40,918 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:40" (1/1) ...
[2020-07-20 12:21:40,921 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e15673d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:40, skipping insertion in model container
[2020-07-20 12:21:40,921 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:40" (1/1) ...
[2020-07-20 12:21:40,930 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 12:21:40,956 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 12:21:41,133 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 12:21:41,138 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 12:21:41,157 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 12:21:41,173 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 12:21:41,173 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41 WrapperNode
[2020-07-20 12:21:41,173 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 12:21:41,174 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 12:21:41,174 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 12:21:41,175 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 12:21:41,188 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,189 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,194 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,195 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,199 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,204 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,205 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (1/1) ...
[2020-07-20 12:21:41,302 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 12:21:41,303 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 12:21:41,303 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 12:21:41,303 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 12:21:41,304 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (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
[2020-07-20 12:21:41,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 12:21:41,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 12:21:41,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 12:21:41,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 12:21:41,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 12:21:41,371 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 12:21:41,371 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 12:21:41,372 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 12:21:41,562 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 12:21:41,562 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 12:21:41,566 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:41 BoogieIcfgContainer
[2020-07-20 12:21:41,566 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 12:21:41,567 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 12:21:41,568 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 12:21:41,571 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 12:21:41,571 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:21:40" (1/3) ...
[2020-07-20 12:21:41,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f04218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:41, skipping insertion in model container
[2020-07-20 12:21:41,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:41" (2/3) ...
[2020-07-20 12:21:41,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f04218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:41, skipping insertion in model container
[2020-07-20 12:21:41,573 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:41" (3/3) ...
[2020-07-20 12:21:41,574 INFO  L109   eAbstractionObserver]: Analyzing ICFG geo3.c
[2020-07-20 12:21:41,585 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 12:21:41,593 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 12:21:41,607 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 12:21:41,628 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 12:21:41,628 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 12:21:41,628 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 12:21:41,628 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 12:21:41,628 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 12:21:41,628 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 12:21:41,629 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 12:21:41,629 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 12:21:41,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states.
[2020-07-20 12:21:41,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 12:21:41,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 12:21:41,650 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:21:41,650 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:21:41,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:21:41,655 INFO  L82        PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times
[2020-07-20 12:21:41,663 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:21:41,663 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083957881]
[2020-07-20 12:21:41,664 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:41,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:21:41,721 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 12:21:41,726 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:21:41,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:21:41,758 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 12:21:41,759 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083957881]
[2020-07-20 12:21:41,760 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 12:21:41,760 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 12:21:41,761 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231719431]
[2020-07-20 12:21:41,766 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 12:21:41,766 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:21:41,781 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 12:21:41,782 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 12:21:41,785 INFO  L87              Difference]: Start difference. First operand 20 states. Second operand 2 states.
[2020-07-20 12:21:41,813 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:21:41,813 INFO  L93              Difference]: Finished difference Result 35 states and 45 transitions.
[2020-07-20 12:21:41,814 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 12:21:41,815 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 10
[2020-07-20 12:21:41,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:21:41,824 INFO  L225             Difference]: With dead ends: 35
[2020-07-20 12:21:41,824 INFO  L226             Difference]: Without dead ends: 15
[2020-07-20 12:21:41,828 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 12:21:41,846 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-07-20 12:21:41,869 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-07-20 12:21:41,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-07-20 12:21:41,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2020-07-20 12:21:41,877 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2020-07-20 12:21:41,878 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:21:41,878 INFO  L479      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2020-07-20 12:21:41,878 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 12:21:41,881 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2020-07-20 12:21:41,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 12:21:41,882 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 12:21:41,882 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:21:42,098 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:42,098 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:21:42,099 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:21:42,099 INFO  L82        PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times
[2020-07-20 12:21:42,100 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:21:42,101 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239863252]
[2020-07-20 12:21:42,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:42,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:21:42,133 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 12:21:42,135 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:21:42,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:21:42,237 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 12:21:42,238 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239863252]
[2020-07-20 12:21:42,238 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 12:21:42,238 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 12:21:42,239 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505154718]
[2020-07-20 12:21:42,240 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 12:21:42,241 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:21:42,241 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 12:21:42,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 12:21:42,242 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states.
[2020-07-20 12:21:42,310 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:21:42,310 INFO  L93              Difference]: Finished difference Result 25 states and 27 transitions.
[2020-07-20 12:21:42,311 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 12:21:42,311 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2020-07-20 12:21:42,311 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:21:42,312 INFO  L225             Difference]: With dead ends: 25
[2020-07-20 12:21:42,313 INFO  L226             Difference]: Without dead ends: 22
[2020-07-20 12:21:42,314 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 12:21:42,314 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2020-07-20 12:21:42,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2020-07-20 12:21:42,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-07-20 12:21:42,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2020-07-20 12:21:42,321 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10
[2020-07-20 12:21:42,322 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:21:42,322 INFO  L479      AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2020-07-20 12:21:42,322 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 12:21:42,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2020-07-20 12:21:42,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-20 12:21:42,323 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 12:21:42,324 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:21:42,537 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:42,539 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:21:42,539 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:21:42,540 INFO  L82        PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times
[2020-07-20 12:21:42,541 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:21:42,541 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547508735]
[2020-07-20 12:21:42,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:21:42,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:21:42,589 INFO  L263         TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-07-20 12:21:42,592 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:21:42,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 12:21:42,700 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 12:21:42,728 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 12:21:51,286 WARN  L193               SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 22
[2020-07-20 12:21:51,291 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term
[2020-07-20 12:21:51,291 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 12:21:53,318 WARN  L860   $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true
[2020-07-20 12:21:53,331 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 12:21:53,338 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 12:21:53,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked.
[2020-07-20 12:21:53,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547508735]
[2020-07-20 12:21:53,902 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 12:21:53,902 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12
[2020-07-20 12:21:53,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762526027]
[2020-07-20 12:21:53,903 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 12:21:53,903 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:21:53,904 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 12:21:53,904 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132
[2020-07-20 12:21:53,904 INFO  L87              Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states.
[2020-07-20 12:22:02,403 WARN  L193               SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 14
[2020-07-20 12:22:17,263 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:22:17,263 INFO  L93              Difference]: Finished difference Result 32 states and 34 transitions.
[2020-07-20 12:22:17,264 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 12:22:17,264 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 17
[2020-07-20 12:22:17,265 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:22:17,265 INFO  L225             Difference]: With dead ends: 32
[2020-07-20 12:22:17,266 INFO  L226             Difference]: Without dead ends: 28
[2020-07-20 12:22:17,267 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210
[2020-07-20 12:22:17,267 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-07-20 12:22:17,273 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27.
[2020-07-20 12:22:17,273 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-07-20 12:22:17,274 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2020-07-20 12:22:17,275 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17
[2020-07-20 12:22:17,275 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:22:17,275 INFO  L479      AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2020-07-20 12:22:17,275 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 12:22:17,275 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2020-07-20 12:22:17,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 12:22:17,276 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 12:22:17,276 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:22:17,477 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:22:17,478 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:22:17,478 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:22:17,478 INFO  L82        PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times
[2020-07-20 12:22:17,479 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:22:17,479 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776901035]
[2020-07-20 12:22:17,480 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:22:17,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 12:22:17,516 INFO  L263         TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-07-20 12:22:17,518 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 12:22:17,762 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 16
[2020-07-20 12:22:17,774 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 12:22:37,277 WARN  L193               SmtUtils]: Spent 10.68 s on a formula simplification that was a NOOP. DAG size: 24
[2020-07-20 12:22:37,284 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 12:23:04,560 WARN  L193               SmtUtils]: Spent 13.06 s on a formula simplification that was a NOOP. DAG size: 24
[2020-07-20 12:23:06,638 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 12:23:14,892 WARN  L838   $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from false
[2020-07-20 12:23:16,909 WARN  L860   $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from true
[2020-07-20 12:23:16,913 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 12:23:16,913 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 12:23:22,616 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 12:23:26,595 WARN  L193               SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 9
[2020-07-20 12:23:37,875 WARN  L193               SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 11
[2020-07-20 12:23:38,826 WARN  L193               SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 22
[2020-07-20 12:23:38,829 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term
[2020-07-20 12:23:38,831 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 12:23:40,915 WARN  L860   $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0))) (or (= (+ (* c_main_~z~0 c_main_~a~0) (* main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0))) (not (= (+ .cse0 c_main_~a~0) (+ main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0))))))) is different from true
[2020-07-20 12:23:40,916 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776901035]
[2020-07-20 12:23:40,916 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 12:23:40,916 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-07-20 12:23:40,917 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389850024]
[2020-07-20 12:23:40,917 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-20 12:23:40,917 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 12:23:40,918 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-20 12:23:40,918 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=146, Unknown=10, NotChecked=50, Total=240
[2020-07-20 12:23:40,918 INFO  L87              Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states.
[2020-07-20 12:25:45,964 WARN  L193               SmtUtils]: Spent 1.59 m on a formula simplification. DAG size of input: 31 DAG size of output: 26
[2020-07-20 12:25:57,051 WARN  L193               SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 6
[2020-07-20 12:25:59,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 12:25:59,987 INFO  L93              Difference]: Finished difference Result 37 states and 37 transitions.
[2020-07-20 12:25:59,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-07-20 12:25:59,997 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 24
[2020-07-20 12:25:59,997 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 12:25:59,998 INFO  L225             Difference]: With dead ends: 37
[2020-07-20 12:25:59,998 INFO  L226             Difference]: Without dead ends: 35
[2020-07-20 12:25:59,999 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 184.3s TimeCoverageRelationStatistics Valid=53, Invalid=211, Unknown=16, NotChecked=62, Total=342
[2020-07-20 12:25:59,999 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-07-20 12:26:00,006 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34.
[2020-07-20 12:26:00,006 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-07-20 12:26:00,009 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions.
[2020-07-20 12:26:00,010 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24
[2020-07-20 12:26:00,010 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 12:26:00,010 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 34 transitions.
[2020-07-20 12:26:00,010 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-20 12:26:00,011 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions.
[2020-07-20 12:26:00,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 12:26:00,012 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 12:26:00,012 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 12:26:00,213 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 12:26:00,214 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 12:26:00,214 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 12:26:00,215 INFO  L82        PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times
[2020-07-20 12:26:00,215 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 12:26:00,215 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742055964]
[2020-07-20 12:26:00,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in